Si12-411A Troubleshooting
Service Diagnosis 191
5.17 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
The compressor fails to start in about 15 seconds after the compressor run command signal
is sent.
Clearing condition: Continuous run for about 5 minutes (normal)
The system will be shut down if the error occurs 16 times.
Supposed
Causes
Compressor relay cable disconnected
Compressor itself defective
Outdoor unit PCB defective
Stop valve closed
Input voltage out of specification
Troubleshooting
Check No.13
Refer to P.213
Replace the outdoor unit
PCB, outdoor unit fan.
Replace the outdoor unit
PCB.
Reconnect as specified.
∗ Inverter checker
Part No.: 1225477
Correct the power supply or
replace the outdoor unit
PCB.
Replace the compressor.
(R2847)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Normal
NO
NO
NO
YES
YES
NO
YES
Any LED off?
DC380±30V?
Electricals
or compressor harnesses
connected as
specified?
Check the electrolytic capacitor
voltage.
Check with the inverter checker (∗).
Turn off the power. Disconnect the
harnesses U, V and W.
Check No. 13
Check for short-circuit.
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