Daikin FTXN25L Service Manual page 62

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