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Panasonic 26PEK2U6 26PEK2U6 Service Manual - Page 247

Service procedures, Possible cause of malfunction

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Possible cause of malfunction 4. Service procedures Wired remote control display Wireless remote controller receiver display Operation Timer Standby Ceiling panel connection failure P09 Activation of Indoor protection Fan protective thermostat P01 protective Float switch P10 device Faulty drain pump. Drain pump locked. P11 DC fan error. P12 Outdoor protection Discharge temperature trouble P03 High pressure switch or compressor motor thermal protector is activated. P04 Open phase detected, AC power trouble P05 No gas P15 4-way valve locked P19 High cooling load P20 Outdoor fan trouble P22 Inverter compressor trouble (HIC PCB) P26 Inverter compressor trouble (MDC) P29 Simultaneous-operation multi control trouble P31 Compressor current failure (overload) H01 Thermistor Thermistor open circuit Indoor heat exchanger temperature sensor (E1) F01 fault • Short circuit (indoor) Indoor heat exchanger temperature sensor (E2) F02 Indoor temperature sensor F10 Thermistor open circuit Discharge temperature (TD) F04 • Short circuit (outdoor) Outdoor heat exchanger temperature (C1) F06 Outdoor heat exchanger temperature (C2) F07 Outdoor air temperature (TO) F08 Intake temperature (TS) F12 Indoor EEPROM error F29 Outdoor EEPROM error F31 Alter. Alternately Alter. Alter. Simul. Simul. 4 4-3

Section	Page
TECHNICAL DATA & SERVICE MANUAL	1
IMPORTANT!	2
Check of Density Limit	4
Contents	6
1. SPECIFICATIONS	9
1-1. Unit Specifications	10
1-2. Major Component Specifications	37
1-3. Other Component Specifications	61
1-4. Dimensional Data	64
1-5. Refrigerant Flow Diagram	78
1-6. Operating Range	79
1-7. Capacity Correction Graph According to Temperature Condition	80
1-8. Noise Criterion Curves	81
1-9. Increasing the Fan Speed	90
1-10. External Static Pressure Setting	91
1-11. Air Throw Distance Chart	97
1-12. ELECTRICAL WIRING	105
1-13. Installation Instructions	108
2. PROCESSES AND FUNCTIONS	207
2-1. Room Temperature Control	208
2-2. Cold Draft Prevention (Heating Cycle)	210
2-3. Automatic Fan Speed (Indoor Unit)	211
2-4. Control Functions	212
2-5. Outdoor Unit Control PCB	215
2-6. Outdoor Unit Control PCB (CR-CH4272R)	216
3. ELECTRICAL DATA	219
3-1. Indoor Units	220
3-2. Outdoor Units	232
4. SERVICE PROCEDURES	245
4-1. Meaning of Alarm Messages	246
4-2. Symptoms and Parts to Inspect	249
4-3. Details of Alarm Messages	252
4-4. Table of Thermistor Characteristics	260
5. OUTDOOR UNIT MAINTENANCE REMOTE CONTROL	261
In the case of CZ-RTC2	262
5-1. Overview	262
5-2. Functions	262
5-3. Normal Display Operations and Functions	263
5-4. Monitoring Operations: Display of Indoor Unit and Outdoor Unit Sensor Temperatures	266
5-5. Monitoring the Outdoor Unit Alarm History: Display of Outdoor Unit Alarm History	267
5-6. Setting Modes: Setting the Outdoor Unit EEPROM	267
In the case of CZ-RTC4	271
5-7. Overview	271
5-8. Functions	272
5-9. Normal Display Operations and Functions	273
5-10. Monitoring Operations: Display of Indoor Unit and Outdoor Unit Sensor Temperatures	278
5-11. Mounting the Outdoor Unit Alarm History :Display of Outdoor Unit Alarm History	280
5-12. Setting Modes : Setting the Outdoor Unit EEPROM	281
6. TEST RUN	285
6-1. Preparing for Test Run	286
6-2. Caution	287
6-3. Test Run Procedure	287
6-4. Items to Check Before the Test Run	288
6-5. Test Run Using the Remote Controller	288
6-6. Precautions	289
6-7. Table of Self-Diagnostic Functions and Corrections (Type F2, U2, T2, K2, U1, K1, T1 and F1)	290