SiUS12-928_A Troubleshooting
Service Diagnosis 128
5.19 Position Sensor Abnormality
Remote
Controller
Display
H6
Outdoor Unit LED
Display
A 5 1 4 2 4 3 1 4 1
Method of
Malfunction
Detection
A compressor startup failure is detected by checking the compressor running condition through the
position detection circuit.
Malfunction
Decision
Conditions
If the error repeats 8 times, the system is shut down.
Reset condition: Continuous run for about 5 minutes without any other error
Supposed
Causes
Disconnection of the compressor relay cable
Defective compressor
Defective outdoor unit PCB
Startup failure caused by the closed stop valve
Input voltage out of specification
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