Position Sensor Abnormality - Daikin CTXS09GVJU Service Manual

Troubleshooting

5.19 Position Sensor Abnormality

H6
Remote
Controller
Display
Outdoor Unit LED A 5
Display
Method of
A compressor startup failure is detected by checking the compressor running condition through the
position detection circuit.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.13
Refer to P.165
140
1 4 2 4 3 1 4 1
The system will shut down if the error occurs 8 times.
Compressor relay cable disconnected
Compressor itself defective
Outdoor unit PCB defective
Stop valve closed
Input voltage out of specification
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check No. 13
Check for short-circuit.
Normal?
YES
Check the electrolytic capacitor
voltage.
DC320±30V?
YES
Electricals or
compressor harnesses
connected as
specified?
Turn off the power. Disconnect the
harnesses U, V and W.
Check with the inverter checker (∗).
Any LED off?
NO
NO
NO
NO
YES
SiUS12-814
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.
(R7175)
Service Diagnosis