(1) Self-diagnostics Lamps

INDOOR UNIT

OPERATION button

 

 

OPERATION lamp

 

TIMER lamp

 

HIGH POWER lamp

 

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)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OPERATION

Timer

HIGH POWER

Code

Diagnostics items

 

 

 

 

 

Diagnostics contents

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

 

 

 

(3)

Indoor/outdoor PCboard 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 PCboard failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S06

Outdoor air temperature sensor failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

S07

Outdoor electrical current detection

Outdoor PCboard failure

 

 

 

 

 

 

 

 

 

 

failure

 

 

 

 

 

 

 

 

 

 

 

Indoor/outdoor communications failure

(1)

Mis-wiring

(2) AC power failure

(3) Blown fuse

(4) Power Relay failure

 

 

 

E01

(5)

Indoor or outdoor PCboard failure

(6) Outdoor Fan Motor failure (7) Reactor failure

 

 

 

(serial communications)

(8)

High-Pressure Switch failure

(9) Overload Relay failure

(10) Magnetic Coil failure

 

 

 

 

 

* See detailed flowchart in this section.

 

 

 

 

 

 

 

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 PCboard failure

 

 

 

 

 

 

 

E03

Outdoor unit external ROM (OTP data)

(1)

External ROM data failure

 

(2) Outdoor PCboard failure

 

 

 

 

failure

 

 

 

 

 

E04

Peak current cut-off

(1)

Instantaneous power outage

(2) HIC or power transistor failure

 

 

 

(3)

Outdoor PCboard failure

 

 

 

 

 

 

 

 

 

 

E05

PAM circuit failure

(1)

Outdoor PCboard 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 PCboard failure

 

 

 

E07

Indoor fan operating failure

(1)

Fan motor failure

(2) Contact failure at connector

 

(3) Indoor PCboard failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E08

4-way valve switching failure

(1)

4-way valve failure (heat pump model only)

 

 

 

 

 

 

 

Indoor zero-cross failure

(2)

Outdoor PCboard 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 PCboard failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E11

Outdoor fan operating failure

(1)

Fan motor failure

(2) Contact failure at connector

 

(3) Outdoor PCboard failure

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor system communications failure

(1)

Mis-wiring

(2) Blown fuse

(3) Power Relay failure

 

(4) Outdoor PCboard failure

 

 

 

E12

OLR operation

(5)

Compressor failure

 

 

 

 

 

 

 

 

 

 

 

Outdoor power supply open phase

 

 

 

 

 

 

 

 

 

 

 

 

Outdoor coil freezing

* See detailed flowchart in this section.

 

 

 

 

 

 

 

E13

Freeze-prevention operation activated.

(1)

Indoor fan system failure

(2) Shortage of refrigerant

(3) Low-temperature operation

TIMER

BLINKING (3 SEC. INTERVAL)

LAMP

 

FLOAT SWICTH (FS) IS ACTIVED.

(1) DRAIN PUMP FAILURE (2) FS FAILURE (3) CHOKED DRAIN HOSE

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Sanyo XMS0972, XMS1272 service manual Self-diagnostics Lamps

XMS1272, XMS0972 specifications

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