Daikin FTXN50L - Page 62

Service Diagnosis
54
H6 (ARXN/RXN50/60M/N, RXK50/60A)
Description
POSITION SENSOR ABNORMAL (COMPRESSOR)
Possible Root
cause
1. Compressor relay cable disconnected.
2. Compressor itself defective.
3. Outdoor PCB defective.
4. Stop valve closed.
5. Inputvoltageoutofspecication
Troubleshooting
Remark:
Refer to Appendix A for Diode bridge short circuit check procedures.(Page 78, item 6.8)
Voltage as rated?
No
Yes
Check the power supply voltage.
Check stop valve.
Check the connection.
Turn off the power.
Check with the inverter analyzer.
Turn off the power. Disconnect
the harnesses U, V and W.
Turn on the power. Check the
electrolytic capacitor voltage.
Any LED off?
No
Correct the power supply or
replace the outdoor unit PCB.
Reconnect the electrical
components or compressor
harnesses as specified.
Electrical
components or
compressor harnesses
connected as
specified?
No
* Inverter analyzer:
RSUK0917C
Check the short circuit of the
diode bridge.
Normal?
No
Yes
Replace the outdoor unit PCB.
320 = 50 VDC?
No
Yes
Yes
Replace the outdoor unit PCB.
Correct the power supply.
OK?
No
Yes
Yes
Replace the stop valve.
Replace the compressor.