Panasonic WU-336ME2U9 Service Manual

Panasonic WU-336ME2U9 Manual

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  • Panasonic WU-336ME2U9 | Service Manual - Page 1
    U-144ME2U9 U-72ME2U94 U-96ME2U94 U-120ME2U94 U-144ME2U94 Model No. Outdoor Unit Type Outdoor Unit Type ME2 2WAY VRF System 72 U-72ME2U9 U-72ME2U94 Nominal Capacity 96 120 U-96ME2U9 U-120ME2U9 U-96ME2U94 U-120ME2U94 144 U-144ME2U9 U-144ME2U94  To be connecting Indoor Units Indoor
  • Panasonic WU-336ME2U9 | Service Manual - Page 2
    service the system so it operates safely and efficiently. For safe installation and trouble-free operation, you must: ● Carefully read this instruction problem, contact our sales/service outlet or your certified dealer for additional instructions rigid and strong enough to support or hold the unit,
  • Panasonic WU-336ME2U9 | Service Manual - Page 3
    authorized dealer or specialist for cleaning. • In case of malfunction of this appliance, do not repair by yourself. Contact to the sales dealer or service dealer for a repair. CAUTION • Do not touch the air inlet or the sharp aluminum fins of the outdoor unit. You may get injured. • Ventilate
  • Panasonic WU-336ME2U9 | Service Manual - Page 4
    Precautions for Installation Using New Refrigerant 1. Care regarding tubing 1-1. Process tubing l Material: Use clean, dry, free of oil, refrigeration grade, seamless, phosphorous deoxidized copper tube rated for R410A only. Wall thickness shall comply with the applicable legislation. The minimal
  • Panasonic WU-336ME2U9 | Service Manual - Page 5
    3-2. Use R410A exclusive cylinder only. Single-outlet valve (with siphon tube) Liquid refrigerant should be recharged with the cylinder standing on end as shown. New refrigerant R410A cannot be used for earlier models 1. Compressor specifications are different. If recharging a R22 or R407C
  • Panasonic WU-336ME2U9 | Service Manual - Page 6
    and Functions 3-4 4. Monitoring Operations 3-9 5. Outdoor Unit Alarm History Monitor 3-11 6. Mode Settings 3-12 Section 4: REMOTE CONTROLLER FUNCTIONS 4-1 1. Simple Settings Function 4-2 2. Detailed Settings Function 4-8 3. Remote Controller Servicing Functions 4-28 v
  • Panasonic WU-336ME2U9 | Service Manual - Page 7
    Section 5: TROUBLE DIAGNOSIS 5-1 1. Contents of Remote Controller Switch Alarm Display 5-2 2. Outdoor Unit Control Panel LED Display 5-4 3. 2WAY Alarm Codes 5-5 4. Blinking Inspection Display on the Remote Controller 5-30 5.
  • Panasonic WU-336ME2U9 | Service Manual - Page 8
    - MEMO - vii
  • Panasonic WU-336ME2U9 | Service Manual - Page 9
    Coonntteenntsts 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns 1. CONTROL FUNCTIONS 1. Introduction 1-2 2. Selecting Outdoor Unit for Operation 1-3 3. Compressor Control 1-5 4. Output of PCB 1-12 5. Outdoor Unit Fan Control 1-18 6. Outdoor Unit CCU (command controller unit
  • Panasonic WU-336ME2U9 | Service Manual - Page 10
    11.. IInnttrroodduuccttiioonn 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns 1. Introduction The ME2U series outdoor units for USA is a system that allows multiple outdoor units to be connected. All the outdoor units do not utilize the sub units that were used in earlier systems. The
  • Panasonic WU-336ME2U9 | Service Manual - Page 11
    2. SSeelleeccttiinngg OOuuttddoooorr UUnniitt ffoorr OOppeerraattiioonn 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns Outdoor Unit Operating Rules (1) Outdoor Unit Operating Rules As a result of setting the main outdoor and sub outdoor units due to the O/U.ADD setting, the order of
  • Panasonic WU-336ME2U9 | Service Manual - Page 12
    22.. SSeelleeccttiinngg OOuuttddoooorr UUnniitt ffoorrOOppeerraattiioonn 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns (3) Outdoor Unit Stop Rules 1. Stopping of all outdoor units When all outdoor units must stop, all units will stop in order of unit No. every one second. 2.
  • Panasonic WU-336ME2U9 | Service Manual - Page 13
    33. .CCoommpprreessssoorrCCoonnttrrooll 2WA2WY AVYRFVRSFYSSTYESMTEM CoCntornotlrFolunFcutniocntisons (1) Compressors Mounted in the Outdoor Units Placement of compressor seen from the top Type 72, 96 1st compressor 2nd compressor Type 120, 144 1st compressor Front side Front side (2)
  • Panasonic WU-336ME2U9 | Service Manual - Page 14
    33.. CCoommpprreessssoorr CCoonnttrrooll 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns 2. Operating compressors The compressor with higher priority order starts according to the priority orders described on previous page. 3. Stopping compressors The compressor with lower priority
  • Panasonic WU-336ME2U9 | Service Manual - Page 15
    3. Compressor Control 2WAY VRF SYSTEM Control Functions (6) Capacity Control (Roadmap control) 1 The capacity control by the compressors is performed according to the pressure sensor attached to the outdoor unit and temperature thermistor attached to the indoor / outdoor unit heat exchanger. *
  • Panasonic WU-336ME2U9 | Service Manual - Page 16
    3. Compressor Control 2WAY VRF SYSTEM Control Functions 6-2. Condensation temperature adjustment by roadmap control The area B target temperature is different due to cooling and heating operation. Target lower temperature Target upper temperature (Tc_tgt_min) (Tc_tgt_max) Cooling 127.4°F (53
  • Panasonic WU-336ME2U9 | Service Manual - Page 17
    3. Compressor Control 2WAY VRF SYSTEM Control Functions 6-3. Protection Control 1 Compressor discharge temperature protection The compressor capacity is controlled according to the table below. *Discharge temperature that is used for this control is the highest temperature among all compressors
  • Panasonic WU-336ME2U9 | Service Manual - Page 18
    2nd compressor are measured. Outdoor temperature 114.8°F (46°C) B Current table Outdoor temperature 109.4°F (43°C) 1 A Current table U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 A Normal status: Use the same values of 1st compressor and 2nd compressor. Type of outdoor
  • Panasonic WU-336ME2U9 | Service Manual - Page 19
    3. CCoommpprreessssoorr CCoonnttrrooll 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Use the same values of 1st compressor and 2nd compressor. Type of outdoor unit 72 96 120 Current limit 1 19.5 19.5 19.5 144 unit: Ampere 19
  • Panasonic WU-336ME2U9 | Service Manual - Page 20
    4. OSuptepcuiatloCf oPnCtBrol 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns Items Remarks 4-way valve Save valve Refrigerant control valve Solenoid valve Refrigerant balance valve Oil recovery valve By-pass valve Accumulator valve O2 valve MOV for heat exchanger 1 1
  • Panasonic WU-336ME2U9 | Service Manual - Page 21
    44.. OSuptepcuiat loCf oPnCtBrol 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns (3) Refrigerant Control Valve [RCV] The main purpose of this valve is to adjust the flow of refrigerant (refrigerant volume). When the outdoor unit receives a sign of refrigerant shortage, the valve opens
  • Panasonic WU-336ME2U9 | Service Manual - Page 22
    4. OSuptepcuiatloCf oPnCtBrol 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns (4) Refrigerant Balance Valve [RBV] The main purpose of this valve is to adjust the flow of refrigerant (refrigerant volume) in the evaporator. When the outdoor unit receives a sign of overcharged
  • Panasonic WU-336ME2U9 | Service Manual - Page 23
    44.. OSuptepcuiat loCf oPnCtBrol 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns (5) Oil Recovery Valve [ORVR] The purpose of this valve is to recover oil from the oil separator of its own outdoor unit or balance tube to the compressor. This valve turns ON when the oil level of the
  • Panasonic WU-336ME2U9 | Service Manual - Page 24
    4. OSuptepcuiatloCf oPnCtBrol 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns (9) MOV for Heat Exchanger [MOV1, MOV2] 9-1. Type of expansion valves MOV1 : For upper side heat exchanger MOV2 : For lower side heat exchanger 9-2. Power Initialization If no indoor units have started (
  • Panasonic WU-336ME2U9 | Service Manual - Page 25
    tubing connecting the indoor and outdoor units is long, the refrigerant flow in the indoor unit will be reduced significantly. To prevent this trouble from occurring, MOV4 operates so as to increase super-cooling in the double tube coil. MOV4 controls the difference of temperature between the SCG
  • Panasonic WU-336ME2U9 | Service Manual - Page 26
    5. Outdoor Unit Fan Control 2WAY VRF SYSTEM Control Functions (1) Fan Mode These outdoor units utilize a DC fan motor that can be controlled in a maximum of 15 steps (15 modes). However, fan modes 14 and 15 can only be used if high static pressure mode has been set. * For information concerning
  • Panasonic WU-336ME2U9 | Service Manual - Page 27
    55.. OOuuttddoooorr UUnniitt FFaannCCoonnttrrooll 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns 1-2. Snow removal control (1) Independent control of outdoor unit This control is intended to prevent snow from accumulating on stopped fans. The fan motor rotates at 500rpm in the below
  • Panasonic WU-336ME2U9 | Service Manual - Page 28
    5. Outdoor Unit Fan Control 2WAY VRF SYSTEM Control Functions 1-3. Silent mode This unit includes 2 types of silent modes. See the table under the section "(1) Fan Mode" for maximum fan mode in silent mode. Selecting the silent mode results in operation that gives priority to reducing noise,
  • Panasonic WU-336ME2U9 | Service Manual - Page 29
    5. Outdoor Unit Faann CCoonnttrrooll 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl uFnucntciotinosns (2) Fixed Initial Fan Mode For the first 30 seconds after operation starts, the mode is fixed at the initial mode which was calculated from the relationship between the outdoor air temperature and the
  • Panasonic WU-336ME2U9 | Service Manual - Page 30
    6. OOuuttddoooorr UUnniitt CCCCUU ((ccoommmmaanndd ccoonnttrroolllleerr uunniitt)) CCoonnttrrooll 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns Some actuators of indoor unit are controlled by CCU. (1) MOV of Indoor Unit 1-1. Indoor unit without RAP valve kit unit : pulse
  • Panasonic WU-336ME2U9 | Service Manual - Page 31
    66.. OOuuttddoooorr UUnniitt CCCCUU ((ccoommmmaanndd ccoonnttrroollleerruunniitt))CCoonnttrrooll 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns 1-2. Indoor unit with RAP valve kit unit : pulse Operating mode of indoor unit Operating mode of outdoor unit Operating mode of
  • Panasonic WU-336ME2U9 | Service Manual - Page 32
    6. OOuuttddoooorr UUnniitt CCCCUU ((ccoommmmaanndd ccoonnttrroolllleerr uunniitt)) CCoonnttrrooll 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns (2) RAP Valve Kit Operating mode of indoor unit Operating mode of outdoor unit Operating mode of Compressor Thermostat ON/OFF RAP
  • Panasonic WU-336ME2U9 | Service Manual - Page 33
    66.. OOuuttddoooorr UUnniitt CCCCUU ((ccoommmmaanndd ccoonnttrroollleerruunniitt))CCoonnttrrooll 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns 3-2. Heating mode The indoor unit fan in heating mode is stopped from the CCU in the following condition. Discharge air temperature of
  • Panasonic WU-336ME2U9 | Service Manual - Page 34
    ) 8 * Regarding the preset discharge air temperature that is set in the indoor unit is able to change, see the section "4. REMOTE CONTROLLER FUNCTIONS" for this service manual. 9 1 - 26
  • Panasonic WU-336ME2U9 | Service Manual - Page 35
    (1) Oil Level Oil level 2 State Conditions of oil level in compressor Judgment Sufficient The compressor contains sufficient oil. There is no problem. 1 Possibility of shortage There will be a risk of oil shortage soon. Confirm that oil is improved after performing the oil recovery
  • Panasonic WU-336ME2U9 | Service Manual - Page 36
    77. .OOililCCoonntrtrooll 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns (5) System Oil Recovery Control The system oil recovery control is performed by operating all the systems. If the stopped outdoor unit exists, the unit starts operating and the system oil recovery control is
  • Panasonic WU-336ME2U9 | Service Manual - Page 37
    77.. OOiill CCoonnttrrooll 22WWAAYYVVRRFF SSYYSSTTEEMM Control Functions 5-2. Simplified flow of system oil recovery control The system oil recovery control shall be performed as the flow mentioned below. Normal operation → System oil recovery control → Normal operation In the case of cooling
  • Panasonic WU-336ME2U9 | Service Manual - Page 38
    8. 44--WWaayyVVaalvlveeAAddjujussttmmeennttCCoonnttrrooll 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns The purpose of this control is to change over the 4-way valve appropriately with big pressure difference. This control is performed at the following conditions. The first
  • Panasonic WU-336ME2U9 | Service Manual - Page 39
    99..DDeeffrroossttCCoonnttrrooll 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns (1) Type of Defrost Control This system uses the following 2 defrosting systems. System configuration Only 1 outdoor unit in the refrigerant system 2 or more outdoor units in the refrigerant system Name
  • Panasonic WU-336ME2U9 | Service Manual - Page 40
    1 outdoor unit in the refrigerant system 99.2.DoDer emfrfororoessotutCtdCoooonrnutnrtriotosliln the refrigerant system Reverse cycle defrost Outdoor unit cycle defrost 2W2AWYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntciotinosns (4(4)) HCeoantsintrgaiOnpt eCroantidointioSnest Time (Defrosting
  • Panasonic WU-336ME2U9 | Service Manual - Page 41
    99..DDeeffrroossttCCoonnttrrooll 2W2WAYAYVRVFRFSYSSYTSETMEM CConotnrtorloFl Funucntcitoinosns (7) Outdoor Unit Cycle Defrost Outdoor unit cycle defrost is performed in systems where 2 or more outdoor units are connected to the refrigerant system. 7-1. Description of outdoor unit cycle defrost In
  • Panasonic WU-336ME2U9 | Service Manual - Page 42
    . Either of them is controlled by the lower current limitation. The standard value of the limit current is listed in the table below. U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 Type of outdoor unit 72 96 Cooling mode 15.6 A 20.9 A Heating mode 16.8 A 22.2 A 120 26.5 A 28.9 A 144 35
  • Panasonic WU-336ME2U9 | Service Manual - Page 43
    demand control is not performed, upper current limitation is restricted. U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 1 Type of outdoor or service manual. * In respect of connection method for demand terminal block and Seri-Para I/O unit, refer to the installation 7 instructions supplied
  • Panasonic WU-336ME2U9 | Service Manual - Page 44
    system, only compressor that has sensor failure stops. When there are multiple outdoor units in the system, only the outdoor unit which contains the problem stops but the other outdoor units in the system operate normally. 6 B : When there is one outdoor unit in the system, the backup operation
  • Panasonic WU-336ME2U9 | Service Manual - Page 45
    system, only compressor that has sensor failure stops. When there are multiple outdoor units in the system, only the outdoor unit which contains the problem stops but the other outdoor units in the system operate normally. 5 B : When there is one outdoor unit in the system, the backup operation
  • Panasonic WU-336ME2U9 | Service Manual - Page 46
    Non-displayed (2) Manual Backup Operation The manual backup can be used when it is necessary to close the service valve for maintenance INV AC2 INV BACKUP AC1 BACKUP INV2 / AC 4 Type of outdoor unit U-72ME2U9 U-96ME2U94 U-120ME2U94 U-144ME2U94 INV1 + BACKUP INV1 + INV2 + BACKUP ON ON
  • Panasonic WU-336ME2U9 | Service Manual - Page 47
    11. Backup Operation 22WWAAYYVVRRFFSSYYSSTTEEMM CCoonnttrrol Functions 2-2. Disabling operation of one compressor (Type: 120, 144) At the SW7 switch on the PCB of the failed outdoor unit, turn ON the switch for the compressor to disable, and turn ON the "BACKUP" switch (SW7). Type of outdoor unit
  • Panasonic WU-336ME2U9 | Service Manual - Page 48
    12. Other Functions 2WAY VRF SYSTEM Control Functions (1) Auto Change over Cooling/Heating Function It is possible to select auto change over cooling/heating mode in each remote controller even in 2WAY VRF system. The system changes to cooling or heating operation according to number of thermostat
  • Panasonic WU-336ME2U9 | Service Manual - Page 49
    1123..OOththereFr uFnucnticotnios ns 2WAY3VWRAFY SSYYSSTTEEMM Controoll FFuunnccttiioonnss (2) Maintenance Function for Power Supply Stop of Indoor Unit (E06 ignore) The system can continue operation even if outdoor unit cannot communicate with some indoor units. It is necessary to set to EEPROM
  • Panasonic WU-336ME2U9 | Service Manual - Page 50
    13. Detailed Settings in EEPROM of Outdoor Unit 2WAY VRF SYSTEM Control Functions Never use the DN code unlisted in the following table. (P) : Factory preset mode DN Item Setting No. 04 Operation for using snowfall sensor 0=No sensor & control (P) 1=Sensor & control 2=No Sensor & no control
  • Panasonic WU-336ME2U9 | Service Manual - Page 51
    13. Detailed Settings in EEPROM of Outdoor Unit 2WAY VRF SYSTEM Control Functions Never use the DN code unlisted in the following table. (P) : Factory preset mode DN Item AC Actuation of solenoid valve kit (EP closed) C1 O2 output change E1 Discharge air temperature control with thermostat
  • Panasonic WU-336ME2U9 | Service Manual - Page 52
    1144.. OOuuttddoooorr UUnniitt CCoonnttrrooll PPCCBB 2WAY VRF SYSTEM Control Functions (1) Outdoor Unit Control PCB A747841 (U-72ME2U9 / U-96ME2U9) Terminating resistance pin (CN67) HIC3(CN43) RC1 plug (CN75) OC plug (CN76) RC plug (CN73) 1 EMG plug (CN69) 2 Alarm LED (LED1) Alarm LED (LED2)
  • Panasonic WU-336ME2U9 | Service Manual - Page 53
    14. Outdoor Unit Control PCB (2) Outdoor Unit Control PCB A747593 (U-120ME2U9 / U-144ME2U9) Terminating resistance pin (CN67) HIC7(CN78) HIC3(CN43) RC1 plug (CN75) OC plug (CN76) RC plug (CN73) EMG plug (CN69) 2WAY VRF SYSTEM Control Functions Alarm LED (LED1) Alarm LED (LED2) 1 EEPROM LED (
  • Panasonic WU-336ME2U9 | Service Manual - Page 54
    11.4O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB (3) Outdoor Unit Control PCB ACXA73-03280 (U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94) 2WPACYBVaRnFd FSuYnScTtiEoMns Control Functions CN34 CN33 LPS(CN49) HPS(CN46) SW4 SW3 SW2 OIL1,2(CN54) DISCH1(CN55) DISCH2(CN56) EXL1,2(CN60)
  • Panasonic WU-336ME2U9 | Service Manual - Page 55
    14. Outdoor Unit Control PCB (4) Outdoor Unit HIC PCB A747843 (U-72ME2U9 / U-120ME2U9 / U-144ME2U9) 2WAY VRF SYSTEM Control Functions 1 2 3 PUVWN (5) Outdoor Unit HIC PCB A747846 (U-96ME2U9) 4 5 6 7 8 P NU VW 1 - 47 9
  • Panasonic WU-336ME2U9 | Service Manual - Page 56
    114. O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB (6) Outdoor Unit HIC PCB ACXA73-02090 (U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94) 2WPACYBVaRnFd FSuYnScTtiEoMns Control Functions 1 2 3 4 5 6 P U V W NU NV NW 7 8 9 17--468
  • Panasonic WU-336ME2U9 | Service Manual - Page 57
    11.4O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB (7) Outdoor Unit Filter PCB A747842 (U-72ME2U9 / U-120ME2U9 / U-144ME2U9) A747845 (U-96ME2U9) 2WPACYBVaRnFd FSuYnScTtiEoMns Control Functions 1 2 3 ACXA73-02080 (U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94) 4 5 6 7 8 17--479 9
  • Panasonic WU-336ME2U9 | Service Manual - Page 58
    114. O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB (8) Outdoor Unit FAN PCB A747844 A747844 (U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9) 1 2 3 P W V UN ACXA73-02100 (U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94) 4 5 P U V 6 W NU 7 NV NW 8 9 17--580 2WPACYBVaRnFd
  • Panasonic WU-336ME2U9 | Service Manual - Page 59
    11.4O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB (9) Outdoor Unit Relay PCB ACXA73-02110 (U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94) 2WPACYBVaRnFd FSuYnScTtiEoMns Control Functions 1 2 3 4 5 6 7 8 17--591 9
  • Panasonic WU-336ME2U9 | Service Manual - Page 60
    11.4O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB 2WPACYBVaRnFd FSuYnScTtiEoMns Control Functions (10) Functions A. ADD pin (2P, White) (CN30) Auto address setting pin Short-circuit this pin for 1 second or longer to automatically set the addresses at the indoor units that are connected to that
  • Panasonic WU-336ME2U9 | Service Manual - Page 61
    11.4O. Ouutdtdoooor rUUnnititCCoonntrtorol lPPCCBB 2WPACYBVaRnFd FSuYnScTtiEoMns Control Functions Terminating resistance pin (3P, Black) (CN67) For communications circuit impedance matching • A connecting socket (2P, White) is attached to the terminating resistance pin at the time of shipment
  • Panasonic WU-336ME2U9 | Service Manual - Page 62
    114. .OOuutdtdoooorrUUnnititCCoonntrtorol lPPCCBB 2WAY VRF SYSTEM Control Functions Table 1. Setting the System Address [SW1: Rotary switch (black), SW2: 2P DIP (black)] Outdoor system address SW1 setting SW2 setting 1P 2P (10s digit) (20s digit) Outdoor system address SW1 setting SW2
  • Panasonic WU-336ME2U9 | Service Manual - Page 63
    Contents 2WAY VVRRFF SSYYSSTTEEMM OOuuttddoooorr UUnniitt RReeppaaiirr PPrroocceedduurreess 2. OUTDOOR UNIT REPAIR PROCEDURES 1. Removing Panels 2-2 2. Discharging Compressor Oil 2-4 3. Backup Operation 2-7 4. Recovering Refrigerant 2-9 5. Checking for Leakage After Repair 2 -14 6.
  • Panasonic WU-336ME2U9 | Service Manual - Page 64
    2 front (upper and lower) panels. (2) Power outlet panel & tubing cover removal • Remove the power outlet panel. • Remove the tubing cover. U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 1 Type: 72, 96 2 Upper side 3 front panel 4 5 Type: 120, 144 Lower side front panel Mounting Plate
  • Panasonic WU-336ME2U9 | Service Manual - Page 65
    1. RReemmoovviinngg PPaanneellss U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Type: 72, 96 2WAY VVRRFF SSYYSSTTEEMM OOuuttddoooorr UUnniitt RReeppaaiirr PPrroocceedduurreess Upper side front panel Type: 120, 144 Upper side front panel Lower side front panel Mounting Plate 1 Tubing cover
  • Panasonic WU-336ME2U9 | Service Manual - Page 66
    . Be careful to avoid accidental oil release when using the port. 2 U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 Type: 72, 96 Low-pressure Liquid tube service port (for ø5/16" (ø7.94mm)-dia connector) Gas tube service port (for ø5/16" (ø7.94mm)-dia connector) Oil balance tube service port (For
  • Panasonic WU-336ME2U9 | Service Manual - Page 67
    High-pressure outlet port (for ø5/16" (ø7.94mm)-dia connector) Liquid tube service port (for ø5/16" (ø7.94mm)-dia connector) Gas tube service port 1 (for ø5/16" (ø7.94mm)-dia connector) Oil balance tube service port (For ø5/16" (ø7.94mm)-dia connector) Fig. 2-c 2 3 Low-pressure outlet port
  • Panasonic WU-336ME2U9 | Service Manual - Page 68
    22.. DDiisscchhaarrggiinnggCCoommpprreessssoorrOOiill 2WAYY VVRRFF SSYYSSTTEEMM OOuuttddoooorrUUnniittRReeppaaiirrPPrroocceedduurreess 2-2. Discharging Oil in Compressor Recover the refrigerant in the outdoor unit following the procedures in "4. Recovering Refrigerant." Remove the compressor and
  • Panasonic WU-336ME2U9 | Service Manual - Page 69
    during the period after trouble occurs until repairs are made. However, during repair and at other times, use manual backup operation. 3-1. Automatic Settings at the failed outdoor unit No particular changes However, close all service valves (gas tubes, liquid tube, and balance tube) at the
  • Panasonic WU-336ME2U9 | Service Manual - Page 70
    . Collecting refrigerant in the failed outdoor unit Short-circuit the AP pin (CN24) on the control PCB of the failed outdoor unit where the service valves are closed, then turn the power ON. Also disconnect the wiring between the outdoor units. 2 With the normal outdoor units operating, monitor
  • Panasonic WU-336ME2U9 | Service Manual - Page 71
    power of the outdoor unit beforehand (at power mains). (2) Fully close each service valve on the liquid tube, gas tubes, and the balance tube of the 2 CAUTION cylinder and methods used for recovery, follow the specific instructions that came with the refrigerant recovery unit. (5) Locate the AP
  • Panasonic WU-336ME2U9 | Service Manual - Page 72
    service port (for ø5/16" (ø7.94mm)-dia connector) 2 Refrigerant recovery cylinder 4-2. Refrigerant Recovery Procedures (Indoor Unit) Fig. 3-b The flowchart below shows the refrigerant recovery procedures you must follow when replacing or repairing the indoor unit due to trouble Service service
  • Panasonic WU-336ME2U9 | Service Manual - Page 73
    has been provided in the indoor unit as shown in Fig. 4, follow the instructions 3 given in (2) through (6) below. If the service port is instead located in the outdoor side, follow the instructions in "4-2-3. Refrigerant recovery procedures (2)." (2) After running the unit in Cooling mode for
  • Panasonic WU-336ME2U9 | Service Manual - Page 74
    sure that no air enters the tubing at this time. (2) Follow the instructions in "4-2-1. Cooling operation (for all units)" and operate all units in Cooling , connect the manifold gauge valves to the gas tube service port and the liquid tube service port in the next outdoor unit to undergo pump down
  • Panasonic WU-336ME2U9 | Service Manual - Page 75
    (3) If any unit has encountered a power failure, follow the instructions in "4-1. Refrigerant Recovery Procedures (from Outdoor Units)" and perform each part to prevent air from entering the tubing. (6) Check that each service valve of the gas tubes, liquid tube, and the balance tube for
  • Panasonic WU-336ME2U9 | Service Manual - Page 76
    in case of rain. If no problem is found, purge all nitrogen from service port (for ø5/16" (ø7.94mm)-dia connector) Gas tube service port (for ø5/16" (ø7.94mm)-dia connector) 8 5-2. Checking for Leakage in Refrigerant Tubing Between Indoor and Outdoor Units Refer to the "Installation Instructions
  • Panasonic WU-336ME2U9 | Service Manual - Page 77
    circuit and causing operating problems. Therefore, 1 never skip service port 7 (for ø5/16" (ø7.94mm)-dia connector) Gas tube service port (for ø5/16" (ø7.94mm)-dia connector) 8 6-2. Evacuating Refrigerant Tubing Between Indoor and Outdoor Units Refer to the "Installation Instructions
  • Panasonic WU-336ME2U9 | Service Manual - Page 78
    bypass circuit for refrigerant, connect it to the gas 1 tube service port carefully to avoid releasing refrigerant into the atmosphere. (DPR stop the vacuum pump. To ensure proper evacuation, refer to the operating instructions CAUTION that came with the vacuum pump. 5 Manifold gauge Lo Hi
  • Panasonic WU-336ME2U9 | Service Manual - Page 79
    connection port. • Since the DPR valve opens at pressures of 362.6 psi (2.5 MPa) and above, be sure to connect the DPR to the gas tube service port (low-pressure side). 5 Type: 72, 96 High-pressure outlet port (for ø5/16" (ø7.94mm)dia connector) Low-pressure outlet port (for ø5/16" (ø7.94mm)dia
  • Panasonic WU-336ME2U9 | Service Manual - Page 80
    SSYYSSTTEEMM OOuuttddoooorrUUnniittRReeppaaiirrPPrroocceedduurreess DPR Upper side valve Manifold gauge Lo Hi Lower side valve Liquid tube service port (for ø5/16" (ø7.94mm)dia connector) Gas tube service port (for ø5/16" (ø7.94mm)dia connector) Close Close Fig. 11-b 3 4 5 6 7 8 9 2 - 18
  • Panasonic WU-336ME2U9 | Service Manual - Page 81
    Lower side valve Procedure 3: 5 Liquid tube service port Open (for ø5/16" (ø7.94mm)- dia connector) Gas tube service port (for ø5/16" (ø7.94mm)dia connector) of new refrigerant by referring to the "Installation 8 Instructions" that came with the outdoor unit. NOTE To determine the completion
  • Panasonic WU-336ME2U9 | Service Manual - Page 82
    end of the tube into the oil container. (2) Follow the instructions in "6. Evacuating System," and apply vacuum to the outdoor unit to tube service port (for ø5/16" (ø7.94mm)- dia connector) Vacuum pump 4 Oil Liquid tube service port (for ø5/16" (ø7.94mm)dia connector) Gas tube service port
  • Panasonic WU-336ME2U9 | Service Manual - Page 83
    The rated amount of oil is pre-charged in the compressors as given below: Model name Compressor model Q'ty U-72ME2U9 C-9RVN393H0M 1 Pre-charged amount of oil gallon liter 0.502 1.9 U-96ME2U9 C-9RVN393H0N 1 0.502 1.9 U-120ME2U9 C-9RVN393H0M C-9RVN393H0M 2 1 1 0.502 0.502
  • Panasonic WU-336ME2U9 | Service Manual - Page 84
    cylinder to any one of the normal outdoor units at the liquid tube service port (Schrader-type push-to-release valve). Perform the connection work quickly so that -pressure outlet port (for ø5/16" (ø7.94mm)dia connector) Liquid tube service port (for ø5/16" (ø7.94mm)dia connector) 5 6 Connect from
  • Panasonic WU-336ME2U9 | Service Manual - Page 85
    tube and balance tube on the outdoor unit to be repaired. Then slowly close the liquid tube service valve. (6) When the low pressure at the outdoor unit to be repaired reaches 72.5 psi of refrigerant recovery, follow the instructions that came with the refrigerant recovery unit. 6 7 8 2 - 23
  • Panasonic WU-336ME2U9 | Service Manual - Page 86
    cylinder to any one of the normal outdoor units at the liquid tube service port (Schrader-type push-to-release valve). Perform the connection work quickly so -pressure outlet port (for ø5/16" (ø7.94mm)dia connector) Liquid tube service port (for ø5/16" (ø7.94mm)dia connector) 6 7 Connect from
  • Panasonic WU-336ME2U9 | Service Manual - Page 87
    tube on the outdoor unit to be repaired. Then slowly close the liquid tube service valve. * When the low pressure at the outdoor unit to be repaired reaches To determine the completion of refrigerant recovery, follow the instructions that came with the refrigerant recovery unit. 2 3 4 5 6 7
  • Panasonic WU-336ME2U9 | Service Manual - Page 88
    Electrical trouble → (A) Coil burning (B) Open circuit (C) Insulation failure (D) Short circuit Trouble 300 MΩ (2) Compressor → Min. 100 MΩ (servicing part) (3) Unit → Min. 10 MΩ failed YES compressor. Then inspect. Follow the instructions in "2. Discharging Compressor Oil" and drain the
  • Panasonic WU-336ME2U9 | Service Manual - Page 89
    at a time in order to prevent liquid back-flow. (9) Fully close the low-pressure gauge valves on the manifold gauge, follow the instructions in "7. Charging Compressor Oil," and charge with oil if necessary. 5 (10) Remove the manifold gauge. The connecting port employs a Schrader-type push
  • Panasonic WU-336ME2U9 | Service Manual - Page 90
    a little at a time in order to prevent CAUTION liquid back-flow. (9) Fully close the low-pressure gauge valves on the manifold gauge, follow the instructions in "7. Charging Compressor Oil," and charge with the necessary amount of oil. Also add an amount of oil that is equivalent to 5 the amount
  • Panasonic WU-336ME2U9 | Service Manual - Page 91
    little at a time in order to CAUTION prevent liquid back-flow. (10) Fully close the low-pressure gauge valves on the manifold gauge, follow the instructions in "7. Charging Compressor Oil," and charge with the necessary amount of oil. Also add an amount of oil that is equivalent to 5 the amount
  • Panasonic WU-336ME2U9 | Service Manual - Page 92
    in Cooling mode, close first the liquid tube service valve then the ball valve on all outdoor units SCT connector is pulled out, alarm F12 (sensor trouble) immediately occurs and all outdoor units stop operating complete, follow the instructions in the instruction 5 manual of the refrigerant
  • Panasonic WU-336ME2U9 | Service Manual - Page 93
    removed, pressurize with 484 psi (3.34MPa) of nitrogen from the liquid tube service port and check for leaks. (16) After evacuating all nitrogen gas 5 Torr} or less. (17) INSTALLATION: Refer to the Installation Instructions for further information. 1 Charge with an amount of refrigerant equal to
  • Panasonic WU-336ME2U9 | Service Manual - Page 94
    gas replacement in the outdoor unit tubings. (2) Follow the instructions in "1. Removing Panels" and remove the corresponding parts from the compressor. Then disconnect the power terminal. (5) Remove the crankcase heater. U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 2 Type: 72, 96 3 4
  • Panasonic WU-336ME2U9 | Service Manual - Page 95
    9. CCoommpprreessssoorr U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Type: 72, 96 2WAY VVRRFF SSYYSSTTEEMM OOuuttddoooorr UUnniitt RReeppaaiirr PPrroocceedduurreess Remove the post under the box containing the trans. 1 Type: 120, 144 2 3 Insulator for compressor Remove the post under the
  • Panasonic WU-336ME2U9 | Service Manual - Page 96
    9. CCoommpprreessssoorr 2WAY VVRRFF SSYYSSTTEEMM OOuuttddoooorr UUnniitt RReeppaaiirr PPrroocceedduurreess (7) Remove the bolts (×3), washer and spacer (rubber spring). CAUTION Protect the sensors and the surrounding plates, rubber, lead wires, clamps, and other items. Remove the discharge
  • Panasonic WU-336ME2U9 | Service Manual - Page 97
    the manifold gauge to a nitrogen cylinder and perform nitrogen gas replacement. (9) Perform copper brazing at the 2 brazing locations. (10) Follow the instructions in "5. Checking for Leakage After Repair" and check for leaks at the outdoor unit where the compressor was replaced. At this time, also
  • Panasonic WU-336ME2U9 | Service Manual - Page 98
    10. RReeppllaacciinngg PPeerriipphheerraall PPaarrttss ooff FFuussiibbllee PPlluugg 2WAY VVRRFF SSYYSSTTEEMM OOuuttddoooorr UUnniitt RReeppaaiirr PPrroocceedduurreess CAUTION If the fusible plugs are affected by the heat, refrigerant leaks may occur. When welding at the time of replacing the
  • Panasonic WU-336ME2U9 | Service Manual - Page 99
    from outdoor unit and then please follow the following steps. 11-1. Removing the High and Low Pressure Sensors (1) Follow the instructions in "1. Removing Panels" and remove the corresponding components from the outdoor unit where the high pressure sensors will be removed. (2) Disconnect
  • Panasonic WU-336ME2U9 | Service Manual - Page 100
    11. HHiigghh aanndd LLooww PPrreessssuurree SSeennssoorrss Type: 120, 144 Low Pressure Sensor 1 2 3 4 5 6 7 8 9 2 - 38 2WAY VVRRFF SSYYSSTTEEMM OOuuttddoooorr UUnniitt RReeppaaiirr PPrroocceedduurreess High Pressure Sensor
  • Panasonic WU-336ME2U9 | Service Manual - Page 101
    Contents 2WAY VRF SYSTEM Outdoor Unit Maintenance Remote Controller 3. OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER 1. Overview 3-2 2. Functions 3-3 3. Ordinary Display Controls and Functions 3-4 4. Monitoring Operations 3-9 5. Outdoor Unit Alarm History Monitor 3-11 6. Mode Settings 3-12 1 2
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    unit control wiring Outdoor unit control PCB Indoor unit Indoor unit Remote controller Ass'y 4 " Operation manual included in package. Remote controller Remote controller l The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller to
  • Panasonic WU-336ME2U9 | Service Manual - Page 103
    2. Functions 2WAY VRF SYSTEM Outdoor Unit Maintenance Remote Controller n Functions on the ordinary display (1) Functions: Button operations can be used to perform the following functions. • Start/stop of all indoor units • Switching between cooling and heating • Test run of all indoor units •
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    CZ-RTC4, cut out the wire as shown in the figure below because the connector of the remote controller cannot be used directly. Special service checker wiring Relay connector (2P, WHT) RC Outdoor unit PCB (3P, BLU) CUT PCB connector 1 (3P, BLU) Top case Bottom case (Back side) (Back
  • Panasonic WU-336ME2U9 | Service Manual - Page 105
    2WAY VRF SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller l All units start/stop The (Start/Stop operation) button can be used to start and stop all the indoor units. • The LED illuminates if any indoor units is operating. • The LED
  • Panasonic WU-336ME2U9 | Service Manual - Page 106
    2WAY VRF SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller n Display (functions) • Use the temperature setting and buttons to change the item code. À Item code Á Item Outdoor unit alarm No. of connected indoor units Unit Nos. of connected indoor unit
  • Panasonic WU-336ME2U9 | Service Manual - Page 107
    2WAY VRF SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller  XX-YY R.C. Displays the outdoor unit sub-bus address which is currently selected. XX = Outdoor system address on main bus line (1 - 30) YY = Outdoor unit sub-bus address (1 - 8) "1" appears when
  • Panasonic WU-336ME2U9 | Service Manual - Page 108
    2WAY VRF SYSTEM 3. Ordinary Display Controls and Functions Outdoor Unit Maintenance Remote Controller n Concerning the 7-segment, 4-digit display remote controller timer display The unit Nos. of connected units are indicated by four 7-segment digits ( ) and a colon. l Display of unit Nos. 1 − 20
  • Panasonic WU-336ME2U9 | Service Manual - Page 109
    4. Monitoring Operations 2WAY VRF SYSTEM Outdoor Unit Maintenance Remote Controller Display the indoor unit and outdoor unit sensor temperatures. 1. Press and hold the (Check) button and buttons simultaneously for 4 seconds or longer to engage temperature monitor mode.
  • Panasonic WU-336ME2U9 | Service Manual - Page 110
    4. Monitoring Operations 2WAY VRF SYSTEM Outdoor Unit Maintenance Remote Controller Display of unit No. 1 (main unit) DN Description Indoor unit intake temp. (TA) °C Indoor unit heat exchanger temp. E1 (E1) °C - Indoor unit heat exchanger temp. E3 (E3) °C Discharge air temp. (BL) °C
  • Panasonic WU-336ME2U9 | Service Manual - Page 111
    5. Outdoor Unit Alarm History Monitor 2WAY VRF SYSTEM Outdoor Unit Maintenance Remote Controller • D isplays outdoor unit alarms only. • C heck the indoor unit alarm histories separately using the indoor unit remote controllers or other control device. 1. Press and hold
  • Panasonic WU-336ME2U9 | Service Manual - Page 112
    6. M6.oMdoedSeeSttientgtisngs 2W2WAAYYVSRYFSTSEYMSTEM OOutudtodooroUr nUitnMit aMinatienntaenncaenRceemRoetme oCtoenCtroonllterroller Setting mode 1 A Display of first 3 digits 1. Press and hold the (Check) button and (Ventilation) button simultaneously for 4 seconds or
  • Panasonic WU-336ME2U9 | Service Manual - Page 113
    2WAY VRF SYSTEM Remote Controller Functions 4. REMOTE CONTROLLER FUNCTIONS 1. Simple Settings Function 4-2 2. Detailed Settings Function 4-8 3. Remote Controller Servicing Functions 4-28 Regarding the content of the remote controller mentioned below: Refer to the 2WAY VRF SYSTEM Technical Data
  • Panasonic WU-336ME2U9 | Service Manual - Page 114
    the LCD display. Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 2 3. RC setting mode 4.Test run Sel. Page [ ] Confirm 2. button. 4 Maintenance func 20:30 (THU) 5. Sensor info. 6. Servicing check 7. Simple settings 8. Detailed settings Sel. Page [ ] Confirm 5
  • Panasonic WU-336ME2U9 | Service Manual - Page 115
    1. Simple Settings Function 1. Press and hold the and buttons simultaneously for 4 seconds or longer. 2. " ", unit No. " " (or " " in the case of group control), item code " ", and settings 4 data " " are displayed blinking on the remote controller LCD display .
  • Panasonic WU-336ME2U9 | Service Manual - Page 116
    1. Simple Settings Function 2WAY VRF SYSTEM Remote Controller Functions List of Simple Setting Items Item code Item No. Setting data Description 0000 Not displayed 0001 150 hours Filter sign ON time (filter lifetime) 0002 2,500 hours 0003 5,000 hours 0004 10,000 hours 0005 Use the filter
  • Panasonic WU-336ME2U9 | Service Manual - Page 117
    1. Simple Settings Function 2WAY VRF SYSTEM Remote Controller Functions Simple setting items Item code Item 01 Filter sign ON time setting (filter lifetime) 02 Degree of filter fouling Description Changes the indoor unit filter lifetime when a high-performance filter or other optional
  • Panasonic WU-336ME2U9 | Service Manual - Page 118
    Central control address Operating mode priority change Description Set when using a central control device. Used when setting the central control address manually from the remote controller. Note (1) NOTE (1) Explanation of operation mode priority change Enabled only in 2WAY VRF System heat-pump
  • Panasonic WU-336ME2U9 | Service Manual - Page 119
    1. Simple Settings Function 2WAY VRF SYSTEM Remote Controller Functions When the operating mode at the priority remote controller is changed, the operating modes of other remote controllers change as shown below. Mode change at priority remote controller Operating modes at other remote
  • Panasonic WU-336ME2U9 | Service Manual - Page 120
    seconds. The "Maintenance func" screen appears on the LCD display. 20:30 (THU) [ ] START Maintenance func 20:30 (THU) 2 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm 2. Press the or button to see each 3 menu. If you wish to see the
  • Panasonic WU-336ME2U9 | Service Manual - Page 121
    2. Detailed Settings Function 1. Press and hold the , and buttons simultaneously for 4 seconds or longer. 2. " ", unit No. " ", item code " ", and settings data " " are displayed blinking on the 4 remote controller LCD display. At this time, the indoor unit fan
  • Panasonic WU-336ME2U9 | Service Manual - Page 122
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions List of Detailed Setting Items Item code Item No. Description Type 0000 1-Way Cassette (D1) 0006 Concealed Duct - High Static (E1) 0010 Floor Standing (P1) 0001 22 (Type 7) Setting data No. Description No. 4-Way
  • Panasonic WU-336ME2U9 | Service Manual - Page 123
    Normal 0001 Ignore heat exchanger temperature conditions. 0000 Filter input (differential pressure switch input) Filter (CN70) input 0001 Alarm input (for trouble input about air cleaner or similar device) switching 0002 Humidifier input (Operates linked with drain pump when humidifier is ON
  • Panasonic WU-336ME2U9 | Service Manual - Page 124
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions Item code Item Automatic drain pump operation No. 0000 0001 Setting data Description No forced operation Forced operation for 1 minute 0060 Continuous operation Ventilation fan operation 0000 0001 None Ventilation
  • Panasonic WU-336ME2U9 | Service Manual - Page 125
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions Item code Item No. Setting data Description DC fan tap operating mode Purpose 0000 Standard Standard (setting at shipment) Fan tap setting (Fan tap change in order to prevent drop in air discharge caused by filter
  • Panasonic WU-336ME2U9 | Service Manual - Page 126
    (outdoor unit) address Indoor unit address Group address 17 Cooling intake temperature shift Description Set when the indoor unit EEPROM memory is replaced during servicing. These are not set at the time of shipping from the factory. These must be set after installation if auto address setting is
  • Panasonic WU-336ME2U9 | Service Manual - Page 127
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions Item code Item Description 1F (Upper limit) 20 (Lower limit) Cooling 21 (Upper limit) 22 (Lower limit) 23 (Upper limit) 24 (Lower limit) Change to the remote control temperature setting range Heating Drying This
  • Panasonic WU-336ME2U9 | Service Manual - Page 128
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions (Continued from previous page) Item code Item 3C Heat exchanger temperature for cold air discharge 3d Fan output switching 3E Drain pump delayed stop time Description The heat exchanger temperature control point for
  • Panasonic WU-336ME2U9 | Service Manual - Page 129
    No No Set the rated airflow Wired remote controller available volume with the exception of lines 15 , 14 and 8 Yes Yes 6 b. Manual setting c. Manual setting d. Auto airflow volume setting (set with the PC board) Item code "b0" : 0~15 setting (* Note (4)) Item code "b0" : a. No setting
  • Panasonic WU-336ME2U9 | Service Manual - Page 130
    changes, etc.), it is necessary to cancel [b. Manual setting] (disconnect short-circuit connector). When [b. Manual setting] has not been cancelled, [c. Manual setting] and [d. Auto airflow volume setting] will be activated if selected, but [b. Manual setting] takes precedence when the power is
  • Panasonic WU-336ME2U9 | Service Manual - Page 131
    B0 Maintenance func 20:30 (THU) flow volume 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm 0.60 in No auto airflow volume setting -001 5 5. Sensor info. 6. Servicing check Auto airflow volume setting -002 7. Simple settings 8. Detailed
  • Panasonic WU-336ME2U9 | Service Manual - Page 132
    simultaneously for 4 or more seconds. The "Maintenance func" screen appears on the LCD display. Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm 7. Press the or button to see each 1 menu. If you wish to see the
  • Panasonic WU-336ME2U9 | Service Manual - Page 133
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions 1-3. Operating the Timer Remote Controller Table 2 Setting the external static pressure (CZ-RTC4) 1-3-1. Setting Item Code " " Indoor unit 7, 9, 12, 15, 18, 24 36, 48, 54 Item code 1. Press and hold down the , and
  • Panasonic WU-336ME2U9 | Service Manual - Page 134
    2. Detailed Settings Function Indoor Fan Performance Item code " " 2WAY VRF SYSTEM Remote Controller Functions Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating Cooling Heating 15 H H Setting at
  • Panasonic WU-336ME2U9 | Service Manual - Page 135
    shipment on PQ line drawing? Yes No Operating by wired remote 3 controller Selection methods of external static pressure setting Yes 4 b. Manual setting c. Manual setting (Setting on PCB) Item code 5d : Setting 3 a. No setting changes Setting switches of TP3 See section "1-4. How to
  • Panasonic WU-336ME2U9 | Service Manual - Page 136
    2. Detailed Settings Function 1-4. How to Set on PC Board 1. Turn off the power breaker to halt the supply of electricity to the PC board. 2. Open the cover of the electrical box and confirm that there is the indoor unit control PC board in it. When using with high static pressure mode, set the
  • Panasonic WU-336ME2U9 | Service Manual - Page 137
    for 4 or more seconds. The "Maintenance func" screen appears on the LCD display. Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm Indoor unit Item code 7 9 12 15 18 External static pressure of the rated
  • Panasonic WU-336ME2U9 | Service Manual - Page 138
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions 1-6. Operating the Timer Remote Controller (CZ-RTC4) 1-6-1. Setting Item Code " " 1. Press and hold down the , and buttons simultaneously for 4 or more seconds. ( , the Unit No., Item Code and Detailed Data will blink
  • Panasonic WU-336ME2U9 | Service Manual - Page 139
    2. Detailed Settings Function 2WAY VRF SYSTEM Remote Controller Functions External static pressure's upper limit in high static pressure mode Standard external static pressure's upper limit H M Rated external static pressure in high static pressure mode External Static Pressure in.WC (Pa) L
  • Panasonic WU-336ME2U9 | Service Manual - Page 140
    with forced thermostat ON 4. Test run 4 Sensor temperature display Temperature display from each sensor Servicing check display Alarm history display 5. Sensor info 6. Service check Press the button. Filter lifetime, operating Simple settings 5 mode priority, central control address
  • Panasonic WU-336ME2U9 | Service Manual - Page 141
    Sensor temperature display Temperature display from each sensor Press and hold the and buttons for 4 seconds or longer. Current operation is maintained. Servicing check display Alarm history display Press and hold the and buttons for 4 seconds or longer. Press the 4 Simple settings Filter
  • Panasonic WU-336ME2U9 | Service Manual - Page 142
    the or button. Select "4. Test run" on the LCD display and press the button. 3 Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm 4 Change the display from OFF to ON by pressing the or button. Then press the
  • Panasonic WU-336ME2U9 | Service Manual - Page 143
    3. Remote Controller Servicing Functions 2WAY VRF SYSTEM Remote Controller Functions Operates the unit with the thermostat forced ON. 1. Press and hold the longer. button
  • Panasonic WU-336ME2U9 | Service Manual - Page 144
    LCD display. Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 3. RC setting mode 2 4.Test run Sel. Page [ ] Confirm 2. button. 4 Maintenance func 20:30 (THU) 5. Sensor info. 6. Servicing check 7. Simple settings 8. Detailed settings Sel. Page [ ] Confirm 5
  • Panasonic WU-336ME2U9 | Service Manual - Page 145
    hold the and buttons simultaneously for 4 seconds or longer. 2. The unit No. "X-X" (main unit No.), item code " " (sensor address), and servicing monitor " " (sensor temperature) are displayed on the remote controller LCD display. 3. Press the temperature setting / buttons and select the item
  • Panasonic WU-336ME2U9 | Service Manual - Page 146
    3. Remote Controller Servicing Functions 2WAY VRF SYSTEM Remote Controller Functions Indoor unit sensors 00 Room temp. controlled * Unit No.1 0A Unit No.2 2A Outdoor unit sensors Unit No.3
  • Panasonic WU-336ME2U9 | Service Manual - Page 147
    CCoonntteennttss 2WA2YWVARYFSSYYSSTTEEMM TTrroouubbllee DDiiaaggnnoossiiss 55. .TTRROOUUBBLLEEDDIAIAGGNNOOSSISIS 1. Contents of Remote Controller Switch Alarm Display 5-2 2. Outdoor Unit Control Panel LED Display 5-4 3. 2WAY Alarm Codes 5-5 4. Blinking Inspection Display on the Remote
  • Panasonic WU-336ME2U9 | Service Manual - Page 148
    1. Contents of Remote Controller Switch Alarm Display Possible cause of malfunction 2WAY VRF SYSTEM Trouble Diagnosis ON: Blinking: OFF: Wired remote control display Wireless remote controller receiver display Operation Timer Standby for heating Serial communi- Remote controller is detecting
  • Panasonic WU-336ME2U9 | Service Manual - Page 149
    1. Contents of Remote Controller Switch Alarm Display Possible cause of malfunction 2WAY VRF SYSTEM Trouble Diagnosis ON: Blinking: OFF: Wired remote control display Wireless remote controller receiver display Operation Timer Standby for heating Thermistor fault Outdoor thermistor is either
  • Panasonic WU-336ME2U9 | Service Manual - Page 150
    2. Outdoor Unit Control Panel LED Display 2WAY VRF SYSTEM Trouble Diagnosis ( : ON : Blinking : OFF) LED (RED) 1 2 Display meaning (Both ON) After the power is turned ON (and auto address setting is not in progress), no
  • Panasonic WU-336ME2U9 | Service Manual - Page 151
    With types 72 and 96, only one INV compressor is supplied. With types 120 and 144, two INV compressors are supplied. 2WAY VRF SYSTEM Trouble Diagnosis Alarm code Alarm meaning Page E06 Some indoor units does not respond to outdoor unit. 5-7 E12 Auto Address failed to start. 5-7 E15 Fewer
  • Panasonic WU-336ME2U9 | Service Manual - Page 152
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis Alarm code Alarm meaning Page P03 1st compressor discharge temperature too high. 5-25 P04 Protection device activated. High pressure switch (63PH, 63PH1 or 63PH2)
  • Panasonic WU-336ME2U9 | Service Manual - Page 153
    communications are completed. Therefore, it does not occur in cases of "disconnected serial connector," "no terminal unit set," or other trouble that occurs before initial communications are completed. If initial communications have not been completed, alarm E04 occurs. 1 E12 Alarm Alarm code
  • Panasonic WU-336ME2U9 | Service Manual - Page 154
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis E16 Alarm Alarm code E16 Alarm meaning More unit control wiring, perform auto address setting again. Example - 1 Notes - E20 Alarm (U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9) Alarm code E20 2 Alarm meaning Alarm conditions
  • Panasonic WU-336ME2U9 | Service Manual - Page 155
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis E20 Alarm (U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94) Alarm code E20 Alarm meaning Alarm conditions Probable cause Check Correction Example Notes No indoor unit responded in
  • Panasonic WU-336ME2U9 | Service Manual - Page 156
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis E25 Alarm Alarm code Alarm meaning Alarm conditions Probable cause Check Correction Example Notes E25 The outdoor unit address is duplicating. Communication by outdoor
  • Panasonic WU-336ME2U9 | Service Manual - Page 157
    is used. Check: • Wiggle the sensor and check whether the trouble continues. • Check whether the connector is partially disconnected from the Step 2: If an abnormality was found at Step 1, connect the problem compressor sensor to the other compressor connector on the Outdoor Unit Control PCB
  • Panasonic WU-336ME2U9 | Service Manual - Page 158
    above, then it is possible that electrical noise is the cause of the trouble. It is necessary to provide a line filter or carry out other noise apparent reason. The purpose of this alarm is to facilitate identification of the problem in this case. 3 F06, F23 Alarm Alarm code F06, F23 Alarm
  • Panasonic WU-336ME2U9 | Service Manual - Page 159
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis F08 Alarm Alarm code F08 Alarm meaning TO thermistor for outdoor ambient air temperature has failure. (TO) Alarm conditions (1) Short circuit (A/D step is 10
  • Panasonic WU-336ME2U9 | Service Manual - Page 160
    Control PCB (3) Failure to open the service valve of the outdoor unit (4) Clogged malfunction. A normal PCB is needed to determine whether the problem is a PCB failure or a pressure sensor malfunction. If again. 5 Trouble is corrected: Outdoor Unit Control PCB failure Trouble is not corrected
  • Panasonic WU-336ME2U9 | Service Manual - Page 161
    Codes 2WAY VRF SYSTEM Trouble Diagnosis F17 Alarm Alarm (overcurrent) listed in the table below. Model name U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9 Current (A) 30.0 43.0 30 -pressure status (over-loaded operation) • Open the service valve of the outdoor unit. • Replacing high-pressure
  • Panasonic WU-336ME2U9 | Service Manual - Page 162
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis H03, H13 Alarm (U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9) Alarm (3) Correct the problem. Example (1) The connector was not inserted after the PCB was replaced. Notes Use a normal CT as a tool to determine whether the trouble is a PCB
  • Panasonic WU-336ME2U9 | Service Manual - Page 163
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis H05, H15 Alarm Alarm code H05, H15 Alarm meaning H05 : DISCH1 thermistor at the discharge of 1st compressor is disconnected, shorted or misplaced. (DISCH1)
  • Panasonic WU-336ME2U9 | Service Manual - Page 164
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis H06 Alarm Alarm code H06 Alarm meaning Low pressure a moment. Probable cause (1) Low-pressure sensor failure (2) Failure to open the service valve of the outdoor unit (3) Clogged refrigerant circuit (4) Insufficiency of refrigerant gas
  • Panasonic WU-336ME2U9 | Service Manual - Page 165
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis H07 Alarm Alarm code H07 Alarm meaning Low on oil or the oil recovery circuit has restriction. Alarm conditions This alarm occurs when oil
  • Panasonic WU-336ME2U9 | Service Manual - Page 166
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis H08, H27 Alarm Alarm code Alarm meaning Alarm conditions Probable cause Check Correction Example Notes H08, H27 H08 : OIL1 thermistor for the oil of
  • Panasonic WU-336ME2U9 | Service Manual - Page 167
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis H21, H31 Alarm (U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9) Alarm code H21, H31 Alarm meaning Alarm conditions Probable cause Check H21 : HIC for 2nd compressor has failure. Overcurrent or overheat of
  • Panasonic WU-336ME2U9 | Service Manual - Page 168
    or overheat of HIC. H31 : HIC for 1st compressor has failure. Overcurrent or overheat of HIC. This alarm occurs when the microcomputer identifies a trouble signal (indicating abnormal HIC temperature or other trouble) from the HIC. The HIC judges the current and temperature, and outputs the
  • Panasonic WU-336ME2U9 | Service Manual - Page 169
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis L10 Alarm Alarm code L10 Alarm meaning Alarm conditions Probable cause Check Capacity setting of outdoor unit is not correct. The outdoor unit capacity
  • Panasonic WU-336ME2U9 | Service Manual - Page 170
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis L17 Alarm Alarm code L17 Alarm meaning Model mismatch between outdoor units in one Unit Control PCB 4 Correction circuit. If the connector is normal, correct or replace the problem locations. Example - Notes - 5 6 7 8 9 5 - 24
  • Panasonic WU-336ME2U9 | Service Manual - Page 171
    the outdoor unit service valve. 7 (6) If the cause is still unknown after checking the above, there is possibility that electrical noise is the cause of the trouble. Correction (1) Replace the sensor. (2) Replace the Outdoor Unit Control PCB. (3) Correct the problem locations. Example All
  • Panasonic WU-336ME2U9 | Service Manual - Page 172
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis P04 Alarm Alarm code P04 Alarm meaning Protection device fan failure. (10) Check whether the refrigerant circuit is clogged. Check that all service valves are closed. Check whether welded locations are clogged. (11) Check for expansion
  • Panasonic WU-336ME2U9 | Service Manual - Page 173
    secondary current. Secondary current HIC PCB Model name Current (A) U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9 30.0 44.0 30.0 30.0 7 strong possibility of a compressor failure. An alarm occurs for current detection trouble when it is judged that no current is flowing after Check start (
  • Panasonic WU-336ME2U9 | Service Manual - Page 174
    3. 2WAY Alarm Codes 2WAY VRF SYSTEM Trouble Diagnosis P20 Alarm Alarm code Alarm meaning Alarm of outdoor fan Check the valve, mechanical valve and outdoor fan. - - - 1 P22 Alarm (U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9) Alarm code P22 Alarm meaning Fan motor or inverter drive
  • Panasonic WU-336ME2U9 | Service Manual - Page 175
    lock occurs, there is an open phase in the inverter compressor wiring, or a 7 DCCT failure occurs. This can be judged to be starting trouble which is not caused by HIC. Check Check the power wiring and connector wiring. Correction DCCT failure (replace the HIC PCB) or compressor failure
  • Panasonic WU-336ME2U9 | Service Manual - Page 176
    F16, F17, F23, F24 has occurred, check the alarm history then see the corresponding items. Correction Follow the instructions in the corresponding items to correct the trouble. Recovery 2 Notes 3 After repairing the malfunctioning locations, reset the power for the system (all outdoor units
  • Panasonic WU-336ME2U9 | Service Manual - Page 177
    5. Inspection and Characteristics of Parts 2WAY VRF SYSTEM Trouble Diagnosis (1) High-Pressure Switch (63PH1, 63PH2) U-72ME2U9 / U-96ME2U9 / U-120ME2U9 / U-144ME2U9 63PH1 Disconnect the CN3 connector (3P, white) from the Outdoor Unit Control PCB. Measure the resistance between socket pins 1 and
  • Panasonic WU-336ME2U9 | Service Manual - Page 178
    ˔ Intake temperature thermistor (TA) 10 9 8 7 Resistance 6 5 4 1 3 2 1 50 59 68 77 86 95 104 113 122 131 2 Temperature (˚F) 2WAY VRF SYSTEM Trouble Diagnosis ˔ Indoor unit heat exchanger thermistor (E1, E3) 3 40 35 4 30 25 Resistance 20 15 5 10 5 0 -4 5 14 23 32 41 50 59
  • Panasonic WU-336ME2U9 | Service Manual - Page 179
    5. Inspection and Characteristics of Parts 2WAY VRF SYSTEM Trouble Diagnosis (5) Coil Resistance of Outdoor Unit Fan Motor Model name U-72ME2U9 U-96ME2U9 U-120ME2U9 U-144ME2U9 U-72ME2U94 U-96ME2U94 U-120ME2U94 U-144ME2U94 Resistance (at 68°F) DMSBJ75SY DMSBG75SY U - V 2.8 2.8 2.8 2.8 8.8 8.8
  • Panasonic WU-336ME2U9 | Service Manual - Page 180
    Inspection 144 C-9RVN393HOM a0n.2d46 CCh-9aRVr0N.a234c963tHeOrMis0t.2ic46s of C-9RVN393HOM Parts 0.246 0.246 C-9RVN393HOM 0.2462WAY VRF SYSTEM Trouble Diagnosis 0.246 0.246 0.246 0.246 0.246 0.246 (7) Characteristics of Thermistor (Outdoor Unit) ˔ Ambient air temperature thermistor (TO
  • Panasonic WU-336ME2U9 | Service Manual - Page 181
    6. Test Pin 2WAY VRF SYSTEM Trouble Diagnosis When the TEST pin on the Outdoor Unit Control PCB is short-circuited, each part can be operated individually. • After turning OFF the main
  • Panasonic WU-336ME2U9 | Service Manual - Page 182
    SSyymmppttoomm:: TThheerrmmoossttaatt iinn OOFFFF ccoonnttiinnuueess oorr ccyycclleess OOFFFF && OONN ttoooo ffrreeqquueennttllyy Mini VRF SYSTEM 2TWroAuYbVleRFDiSaYgSnToEsMis Trouble Diagnosis 1. How to detect abnormality • Abnormality does not occur. Protective function can be checked when
  • Panasonic WU-336ME2U9 | Service Manual - Page 183
    Contents 2WAY VRF SYSTEM Test Run 6. TEST RUN 1. Preparing for Test Run 6-2 2. Test Run Procedure 6-3 3. Main Outdoor Unit PCB Setting 6-4 4. Function Switches on P.C. Board 6-7 5. Auto Address Setting 6-9 6. Setting Test Run Remote Controller 6-17 7. Caution for Pump Down 6-18 8.
  • Panasonic WU-336ME2U9 | Service Manual - Page 184
    the contents of the instruction manual, then have the customer actually operate the system. (8) Be sure to give the instruction manual and warranty certificate to Power mains switch (6) Both the gas and liquid tube service valves are open. If not, open them now. 5 6 7 Balance tube Liquid tube 8 Gas
  • Panasonic WU-336ME2U9 | Service Manual - Page 185
    .) 7 Set the remote controller to a test run. Follow the section "8. Self-Diagnosis Function Table and Contents of Alarm Display" and resolve the problem. See the section "6. Setting Test Run Remote Controller." Does system operate? NO *2 At least 5 hours must have passed after the power ON
  • Panasonic WU-336ME2U9 | Service Manual - Page 186
    3. Main Outdoor Unit PCB Setting 2WAY VRF SYSTEM Test Run 37.-3M.aiMnaOinutOduotodroUornUitnPitCPBCSBeStteinttging U-72ME2U9 / U-96ME2U9 Terminating resistance pin CN73 SW6 CN23 CN34 CN33 SW5 SW4 CN24 SW3 CN27 CN28 CN30 1 SW5 ON SW6 ON OFF OFF O/U. ADD NO. OF O/U
  • Panasonic WU-336ME2U9 | Service Manual - Page 187
    3. Main Outdoor Unit PCB Setting U-72ME2U94 / U-96ME2U94 / U-120ME2U94 / U-144ME2U94 Terminating resistance pin CN73 JP11 JP12 CN69 CN82 TM1 6 - 5 2WAY VRF SYSTEM Test Run LED1 LED2 CN34 CN33 SW5 SW6 SW4 SW3 SW2 1 SW1 CN25 CN24 CN23 2 CN40 CN30 CN28 CN27 3 4 5 6 7 8 9
  • Panasonic WU-336ME2U9 | Service Manual - Page 188
    3. Main Outdoor Unit PCB Setting 2WAY VRF SYSTEM Test Run l Outdoor unit number setting (SW5) Unit number setting Unit 1 (at shipment) Unit 2 Unit 3 Unit number setting (SW5) (3P Dip switch, black) ON ON 1: ON 2 31 OFF ON ON 2: ON 1 23 OFF ON ON 1 & 2: ON 1 23 OFF Notes:
  • Panasonic WU-336ME2U9 | Service Manual - Page 189
    4. Function Switches on P.C. Board 2WAY VRF SYSTEM Test Run 4. Function Switches on P.C. Board UU--7722MMEE22UU99 // UU--9966MMEE22UU99//UU--112200MMEE22UU99//UU--114444MMEE22UU99 Function Switch Remarks MODE pin (3P, BLK) (CN40) Changes to cooling/heating mode. (outdoor main unit is only
  • Panasonic WU-336ME2U9 | Service Manual - Page 190
    4. Function Switches on P.C. Board 2WAY VRF SYSTEM Test Run UU--7722MMEE22UU9944/ /UU-9-966MMEE2U2U9494/ U/ -U1-2102M0EM2EU29U49/4U/-1U4-41M44EM2UE924U94 Function Switch Remarks MODE pin (3P, BLK) (CN40) Changes to cooling/heating mode. (Outdoor main unit is only usable.) When in normal
  • Panasonic WU-336ME2U9 | Service Manual - Page 191
    5. Auto Address Setting 2WAY VRF SYSTEM Test Run 57.-A5.utAouAtoddArdedsrsesSsetStientgting Example: Basic Wiring Diagram (1) • Case of no link wiring (Inter-unit control wiring is not connected to a multiple system.) Indoor unit address setting is possible without starting the compressor. Unit
  • Panasonic WU-336ME2U9 | Service Manual - Page 192
    5. Auto Address Setting 2WAY VRF SYSTEM Test Run 3 2 Example: Basic Wiring Diagram (2) Setting of terminating resistance pin (CN67) • Case of link wiring No. 1 refrigerant system * See the section "ATTENTION!". Unit 1 setting (outdoor main unit) System address (System 1 setting) (SW1) (SW2)
  • Panasonic WU-336ME2U9 | Service Manual - Page 193
    120Ω. If the resistance value is out of range, check adjustment of the termination resistor again. Even if it is out of range, the problem is caused by wiring. • Is the wiring connection properly completed? • Are there any scratches or deterioration on the coverage? • Measure between conductors and
  • Panasonic WU-336ME2U9 | Service Manual - Page 194
    5. Auto Address Setting 2WAY VRF SYSTEM Test Run Case 3.a (Auto address setting in heating mode) l In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system: Indoor unit auto address setting cannot be made unless the compressor is started. How to control
  • Panasonic WU-336ME2U9 | Service Manual - Page 195
    5. Auto Address Setting 2WAY VRF SYSTEM Test Run Case 3.b (Auto address setting in cooling mode) l In case of impossibility of turning ON power to indoor/outdoor units in each refrigerant system: The indoor unit auto address setting cannot be made unless the compressor is started. How to control
  • Panasonic WU-336ME2U9 | Service Manual - Page 196
    5. Auto Address Setting 2WAY VRF SYSTEM Test Run Auto Address Setting from the High-spec Wired Remote Controller (CZ-RTC5A) 1. Keep pressing the , and buttons simultaneously for 4 or more seconds. The "Maintenance func" screen appears on the LCD display. 2. Press the or button to see
  • Panasonic WU-336ME2U9 | Service Manual - Page 197
    5. Auto Address Setting 2WAY VRF SYSTEM Test Run Display During Auto Address Setting On the surface of outdoor unit control P.C. board LED 1 2 Blinks alternately * Do not short circuit the A.ADD pin (CN30) again during auto address setting. LEDs 1 and 2 go out and address setting is interrupted
  • Panasonic WU-336ME2U9 | Service Manual - Page 198
    appears on the LCD display. Select the "Unit no." by pressing the or button for changes. Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm 1 2. Press the or button to see each menu. If you wish to see the next
  • Panasonic WU-336ME2U9 | Service Manual - Page 199
    the button. Maintenance func 20:30 (THU) 1. Outdoor unit error data 2. Service contact 3. RC setting mode 4.Test run Sel. Page [ ] Confirm Change the Diagnosis Function Table and Contents of Alarm Display" and correct the problem. 4. After the test run is completed, press the button again
  • Panasonic WU-336ME2U9 | Service Manual - Page 200
    means refrigerant gas in the system is returned to the outdoor unit. Pump down is used when the unit is to be moved, or before servicing the refrigerant circuit. See the section 2. CAUTION This outdoor unit cannot collect more than the rated refrigerant amount as shown by the nameplate on the
  • Panasonic WU-336ME2U9 | Service Manual - Page 201
    unit normal? (Compressor ON at the time of auto address setting) Are there any wrong system address installed in indoor units caused by manual or incorrect auto address control? 3 1) When auto address setting from outdoor main unit control P.C. board or remote controller begins, "Under Setting
  • Panasonic WU-336ME2U9 | Service Manual - Page 202
    8. Self-Diagnosis Function Table and Contents of Alarm Display 2WAY VRF SYSTEM Test Run Remote control display Alarm contents E09 Two or more remote controllers are set as main on R1-R2 link. E12 Auto Address failed to start. E14 Two or more indoor units are set as main, in the group
  • Panasonic WU-336ME2U9 | Service Manual - Page 203
    8. Self-Diagnosis Function Table and Contents of Alarm Display 2WAY VRF SYSTEM Test Run Remote control display Alarm contents P04 Protection device activated. High pressure switch (63PH, 63PH1 or 63PH2) or compressor thermal protector (49C1 / 49C2). P05 Missing phase in power input is
  • Panasonic WU-336ME2U9 | Service Manual - Page 204
    8. Self-Diagnosis Function Table and Contents of Alarm Display 2WAY VRF SYSTEM Test Run Wired remote control display Detected contents Indoor thermistor is either open or damaged. E1 thermistor on liquid side of indoor heat exchanger has failure. (E1) Indoor unit set as single
  • Panasonic WU-336ME2U9 | Service Manual - Page 205
    120 . If the resistance values are out of range, check again the terminating resistance. Nevertheless, if the values are out of range, the problem comes from wiring. Megger Line 7 • Is the connection properly made? (Wire) • Are there any scratches or damages on the coated surface? • Measure
  • Panasonic WU-336ME2U9 | Service Manual - Page 206
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2WAY VRF System
U-72ME2U9
U-120ME2U9
U-96ME2U9
U-144ME2U9
U-72ME2U94
U-120ME2U94
U-96ME2U94
U-144ME2U94
85464849337007
REFERENCE NO.
SM830237-07
Order No. SBPAC1404012CE
Model No.
To be connecting Indoor Units
This air conditioner uses the refrigerant R410A.
7
9
12
15
18
24
36
48
54
Y2
D1
F2
M2
E1
T2
K2
P1
R1
Concealed Floor Standing
Outdoor Unit
72
96
120
144
Nominal Capacity
ME2
2WAY VRF System
U-72ME2U9
U-72ME2U94
U-96ME2U9
U-120ME2U9
U-144ME2U9
U-96ME2U94
U-120ME2U94
U-144ME2U94
Outdoor Unit Type
Type
Indoor Units
Nominal Capacity
U2
4-Way Cassette 36"x36"
Indoor Unit Type
Type
S-12MY2U6
S-12MD1U6
S-12MF2U6
S-12MM2U6
S-09MD1U6
S-09MF2U6
S-09MM2U6
S-07MD1U6
S-09MY2U6
S-07MY2U6
S-12MU2U6
S-09MU2U6
S-07MU2U6
S-07MF2U6
S-07MM2U6
S-12MT2U6
S-12MK2U6
S-12MP1U6
S-12MR1U6
S-15MF2U6
S-15MM2U6
S-15MP1U6
S-15MR1U6
S-09MK2U6
S-09MP1U6
S-09MR1U6
S-07MK2U6
S-07MP1U6
S-07MR1U6
S-18MY2U6
S-18MF2U6
S-18MM2U6
S-18MT2U6
S-18MK2U6
S-18MP1U6
S-18MR1U6
S-24MU2U6
S-24MF2U6
S-36MU2U6
S-36MF2U6
S-36ME1U6
S-48MF2U6
S-54MF2U6
S-48ME1U6
S-24MT2U6
S-24MK2U6
S-24MP1U6
S-24MR1U6
Concealed Duct
-High Static
Concealed Duct
-Low Static
Concealed Duct
-Medium Static
4-Way Cassette 24"x24"
1-Way Cassette
Ceiling
Wall Mounted
Floor Standing