Sanyo 24KHS72 Service Manual - Page 43

Self-diagnostics Lamps

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(1) Self-diagnostics Lamps INDOOR UNIT (1) OPERATION lamp (2) TIMER lamp (3) QUIET lamp ION lamp OPERATION button REMOTE CONTROL receiver Since the indications cover various units, the corresponding parts listed below may not be present in some models. Indication on indoor unit Quiet (3) Timer (2) Operation (1) Code .... OFF Diagnostics items .... Blinking .... ON (Illuminated) Diagnostics contents S01 S02 S03 Room temperature sensor failure Indoor heat exchanger sensor failure Humidity sensor failure (1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (short-circuit detection only for the humidity sensor) (3) Indoor/outdoor PCboard failure S04 S05 Compressor temperature sensor failure Outdoor heat exchanger sensor failure (1) Sensor open circuit or short circuit (2) Contact failure at connector or open circuit at terminal crimping location (3) Outdoor PCboard failure S06 S07 E01 E02 E03 E04 E05 E06 E07 E08 E09 Outdoor air temperature sensor failure Outdoor electrical current detection failure Indoor/outdoor communications failure (serial communications) • HIC circuit failure • Power Tr (transistor) circuit failure Outdoor PCboard failure (1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power Relay failure (5) Indoor or outdoor PCboard failure (6) Outdoor Fan Motor failure (7) Reactor failure (8) High-Pressure Switch failure (9) Overload Relay failure (10) Magnetic Coil failure * See detailed flowchart in this section. (1) HIC or power Tr failure (2) Outdoor fan does not turn. (3) Instantaneous power outage (4) Service valve not opened. (5) Outdoor fan blocked. (6) Continuous overload operation (7) Compressor failure (8) Outdoor PCboard failure Outdoor unit external ROM (OTP data) failure Peak current cut-off PAM circuit failure Active circuit failure (1) External ROM data failure (2) Outdoor PCboard failure (1) Instantaneous power outage (2) HIC or power transistor failure (3) Outdoor PCboard failure (1) Outdoor PCboard failure (2) Outdoor power supply voltage failure Compressor discharge overheat prevention activated. (1) Electric expansion valve failure (2) Capillaries choked (3) Shortage of refrigerant (4) Continuous overload operation (5) Outdoor fan does not rotate (6) Outdoor PCboard failure Indoor fan operating failure (1) Fan motor failure (2) Contact failure at connector (3) Indoor PCboard failure 4-way valve switching failure Indoor zero-cross failure No-refrigerant protection (1) 4-way valve failure (heat pump model only) (2) Outdoor PCboard failure (1) Service valve not opened. (2) Shortage of refrigerant E10 DC compressor drive circuit failure (1) Open phase (2) Outdoor PCboard failure E11 E12 E13 Outdoor fan operating failure (1) Fan motor failure (2) Contact failure at connector (3) Outdoor PCboard failure Outdoor system communications failure OLR operation Outdoor power supply open phase Outdoor coil freezing (1) Mis-wiring (2) Blown fuse (3) Power Relay failure (4) Outdoor PCboard failure (5) Compressor failure * See detailed flowchart in this section. Freeze-prevention operation activated. (1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation 43

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Since the indications cover various units, the corresponding parts listed below may not be
present in some models.
REMOTE CONTROL receiver
(1) OPERATION lamp
(2) TIMER lamp
(3) QUIET lamp
ION lamp
OPERATION button
INDOOR UNIT
(1) Self-diagnostics Lamps
Indication on indoor unit
....
OFF
Timer
Operation
Code
Diagnostics items
Diagnostics contents
S01
Room temperature sensor failure
Indoor heat exchanger sensor failure
Humidity sensor failure
Compressor temperature sensor failure
Outdoor heat exchanger sensor failure
Outdoor air temperature sensor failure
Indoor/outdoor communications failure
(serial communications)
Outdoor unit external ROM (OTP data)
failure
Peak current cut-off
• HIC circuit failure
• Power
Tr (transistor) circuit failure
PAM circuit failure
Active circuit failure
Outdoor system communications failure
OLR operation
Outdoor power supply open phase
Outdoor coil freezing
Compressor discharge overheat
prevention activated.
Indoor fan operating failure
No-refrigerant protection
DC compressor drive circuit failure
Outdoor fan operating failure
Freeze-prevention operation activated.
4-way valve switching failure
Indoor zero-cross failure
Outdoor electrical current detection
failure
S02
S03
S04
S05
S06
S07
E01
E02
E03
E04
E05
E06
E07
E08
E09
E10
E11
E12
E13
....
Blinking
....
ON (Illuminated)
Quiet
(3)
(2)
(1)
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(short-circuit detection only for the humidity sensor)
(3) Indoor/outdoor PCboard failure
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(3) Outdoor PCboard failure
Outdoor PCboard failure
(1) Mis-wiring
(2) AC power failure
(3) Blown fuse
(4) Power Relay failure
(5) Indoor or outdoor PCboard failure
(6) Outdoor Fan Motor failure
(7) Reactor failure
(8) High-Pressure Switch failure
(9) Overload Relay failure
(10) Magnetic Coil failure
* See detailed flowchart in this section.
(1) HIC or power Tr failure
(2) Outdoor fan does not turn.
(3) Instantaneous power outage
(4) Service valve not opened.
(5) Outdoor fan blocked.
(6) Continuous overload operation
(7) Compressor failure
(8) Outdoor PCboard failure
(1) External ROM data failure
(2) Outdoor PCboard failure
(1) Instantaneous power outage
(2) HIC or power transistor failure
(3) Outdoor PCboard failure
(1) Outdoor PCboard failure
(2) Outdoor power supply voltage failure
(1) Electric expansion valve failure
(2) Capillaries choked
(3) Shortage of refrigerant
(4) Continuous overload operation
(5) Outdoor fan does not rotate
(6) Outdoor
PCboard
failure
(1) Fan motor failure
(2) Contact failure at connector
(3) Indoor PCboard failure
(1) 4-way valve failure (heat pump model only)
(2) Outdoor PCboard failure
(1) Service valve not opened.
(2) Shortage of refrigerant
(1) Open phase
(2) Outdoor PCboard failure
(1) Fan motor failure
(2) Contact failure at connector
(3) Outdoor PCboard failure
(1) Mis-wiring
(2) Blown fuse
(3) Power Relay failure
(4) Outdoor PCboard failure
(5) Compressor failure
* See detailed flowchart in this section.
(1) Indoor fan system failure
(2) Shortage of refrigerant
(3) Low-temperature operation
43