Specifications

Troubleshooting SiUS12-928_A
105 Service Diagnosis
Troubleshooting
Check No.06
Refer to P.152
Note: If the outdoor temperature is below –10°C (14°F) in the cooling mode, the unit may be suspended
with error A5 displayed. The system is reset, but this suspension is recorded in the error history
memory.
f
NO
NO
NO
Check No. 06
Check the indoor heat exchanger
thermistor.
YES
YES
(R7131)
YES
YES
NO
Caution
Provide sufficient air passage.
Clean the air filter.
Clean the indoor heat
exchanger.
Replace the indoor unit PCB.
Replace the thermistor.
Does it
conform to the
thermistor characteristic
chart?
Check the air filter.
Check the dust accumulation on
the indoor heat exchanger.
Are there any short circuits?
Is it very dirty?
Is it very dirty?
Check the air passage.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.