Daikin K-Series Service Manual page 110

SiBE061121.book Page 100 Monday, April 25, 2011 3:21 PM
Troubleshooting
Troubleshooting 25/35 class
Check No.15
Refer to P.123
Check No.18
Refer to P.126
Check No.20
Refer to P.127
100
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Turn off the power.
Check the power supply voltage.
NO
Voltage as rated?
YES
Check No. 18
Check the discharge pressure.
NO
OK?
YES
Check No. 20
Check the short circuit of the diode
bridge.
NO
Normal?
YES
Check the connection.
Electrical
components or
NO
compressor harnesses
connected as
specified?
YES
Turn on the power.
Check the electrolytic capacitor
voltage.
NO
320 ± 50 VDC?
YES
Turn off the power. Disconnect the
harnesses U, V, and W.
Check No.15
Check with the inverter checker (∗).
YES
Any LED OFF?
NO
∗ Inverter checker
Part No.: 1225477
SiBE061121
Correct the power supply.
Replace the stop valve.
Replace the outdoor unit
PCB.
Reconnect them as
specified.
Replace the outdoor unit
PCB.
Correct the power supply
or replace the outdoor unit
PCB.
Replace the compressor.
(R14625)
Service Diagnosis