Indoor Unit; Self-Diagnostics Lamps - Sanyo KHS1872 + CH1872 Service Manual

(1) Self-diagnostics Lamps

INDOOR UNIT

Since the indications cover various units, the corresponding parts listed below may not be present in some models.
Indication on indoor unit
Quiet
Timer Operation
(3) (2) (1)
Code Diagnostics item
S01
Room temperature sensor failure
S02
Indoor heat exchanger sensor failure
S03
Humidity sensor failure
S04 Compressor temperature sensor failure
S05
Outdoor heat exchanger sensor failure
Outdoor air temperature sensor failure
S06
Outdoor electrical current detection
S07
failure
Indoor/outdoor communications failure
E01
(serial communications)
• HIC circuit failure
E02
• Power Tr (transistor) circuit failure
Outdoor unit external ROM (OTP data)
E03
failure
E04 Peak current cut-off
• PAM circuit failure
E05
• Active circuit failure
Compressor discharge overheat
E06
prevention activated.
E07 Indoor fan operating failure
• 4-way valve switching failure
E08
• Indoor zero-cross failure
E09
No-refrigerant protection
E10
DC compressor drive circuit failure
Outdoor fan operating failure
E11
• Outdoor system communications failure
• Outdoor high-pressure SW
•
E12 OLR operation
•
Outdoor power supply open phase
•
Outdoor coil freezing
E13
Freeze-prevention operation activated.
(1) OPERATION lamp
(2) TIMER lamp
(3) QUIET lamp
ION lamp
OPERATION button
REMOTE CONTROL receiver
.... OFF .... Blinking
Diagnostics contents
(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 circuit board failure
(1) Sensor open circuit or short circuit
(2) Contact failure at connector or open circuit at terminal crimping location
(3) Outdoor circuit board failure
Outdoor circuit board failure
(1) Mis-wiring (2) AC power failure (3) Blown fuse (4) Power relay failure
(5) Indoor or outdoor circuit board failure
(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 circuit board failure
(1) External ROM data failure (2) Outdoor circuit board failure
(1) Instantaneous power outage (2) HIC or power transistor failure
(3) Outdoor circuit board failure
(1) Outdoor circuit board 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 circuit board failure
(1) Fan motor failure (2) Contact failure at connector (3) Indoor circuit board failure
(1) 4-way valve failure (heat pump model only)
(2) Outdoor circuit board failure
(1) Service valve not opened. (2) Shortage of refrigerant
(1) Open phase (2) Outdoor circuit board failure
(1) Fan motor failure (2) Contact failure at connector (3) Outdoor circuit board failure
(1) Mis-wiring (2) Blown fuse (3) Power relay failure (4) Open phase
(5) Outdoor circuit board failure (6) Compressor failure
(1) Indoor fan system failure (2) Shortage of refrigerant (3) Low-temperature operation
41
.... ON (Illuminated)