Sanyo C1872, C2472, CL2472, CL1872 service manual 1Self-diagnosticsLamps

(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

.... OFF

.... Blinking

.... ON (Illuminated)

Quiet

Timer

Operation

Code

Diagnostics item

Diagnostics contents

(3)

(2)

(1)

S01

Room temperature sensor failure

(1)

Sensor open circuit or short circuit

(2)

Contact failure at connector or open circuit at terminal crimping location

S02

Indoor heat exchanger sensor failure

(short-circuit detection only for the humidity sensor)

(3)

Indoor/outdoor circuit board failure

S03

Humidity sensor failure

S04

Compressor temperature sensor failure

(1)

Sensor open circuit or short circuit

(2)

Contact failure at connector or open circuit at terminal crimping location

S05

Outdoor heat exchanger sensor failure

(3)

Outdoor circuit board failure

S06

Outdoor air temperature sensor failure

S07

Outdoor electrical current detection

Outdoor circuit board failure

failure

E01

Indoor/outdoor communications failure

(1)

Mis-wiring

(2) AC power failure

(3) Blown fuse

(4) Power relay failure

(serial communications)

(5)

Indoor or outdoor circuit board failure

E02

• HIC circuit 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

• Power Tr (transistor) circuit failure

(7)

Compressor failure

(8) Outdoor circuit board failure

E03

Outdoor unit external ROM (OTP data)

(1)

External ROM data failure

(2) Outdoor circuit board failure

failure

E04

Peak current cut-off

(1)

Instantaneous power outage (2) HIC or power transistor failure

(3)

Outdoor circuit board failure

E05

PAM circuit failure

(1)

Outdoor circuit board failure

(2) Outdoor power supply voltage failure

Active circuit failure

E06

Compressor discharge overheat

(1) Electric expansion valve failure

(2) Capillaries choked (3) Shortage of refrigerant

prevention activated.

(4) Continuous overload operation

(5) Outdoor fan does not rotate (6) Outdoor circuit board failure

E07

Indoor fan operating failure

(1)

Fan motor failure

(2) Contact failure at connector

(3) Indoor circuit board failure

E08

4-way valve switching failure

(1)

4-way valve failure (heat pump model only)

Indoor zero-cross failure

(2)

Outdoor circuit board failure

E09

No-refrigerant protection

(1)

Service valve not opened.

(2) Shortage of refrigerant

E10

DC compressor drive circuit failure

(1)

Open phase

(2) Outdoor circuit board failure

E11

Outdoor fan operating failure

(1)

Fan motor failure

(2) Contact failure at connector

(3) Outdoor circuit board failure

Outdoor system communications failure

E12

Outdoor high-pressure SW

(1)

Mis-wiring

(2) Blown fuse

(3) Power relay failure

(4) Open phase

OLR operation

(5)

Outdoor circuit board failure

(6) Compressor failure

Outdoor power supply open phase

Outdoor coil freezing

E13

Freeze-prevention operation activated.

(1)

Indoor fan system failure

(2) Shortage of refrigerant

(3) Low-temperature operation

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