Daikin D Series Service Manual page 152

SiBE12-519
Troubleshooting
Check No.04
Refer to P.171
Check No.06
Refer to P.173
Service Diagnosis
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Check the wiring and piping.
Wiring or piping out of spec?
NO
Check No. 04
Check the electronic expansion valve.
Normal?
YES
Check No. 06
Check the outdoor unit heat
exchanger thermistor.
Thermistor as specified
in its characteristic
chart?
YES
Check No. 06
Check the room temperature
thermistor.
Thermistor as specified
in its characteristic
chart?
YES
Change the gas to let moisture out
of the unit (after drawing a
vacuum).
Error again?
NO
YES
NO
NO
NO
YES
Troubleshooting
Correct the wiring or piping
error.
Replace the defective EV or
coil.
Replace the heat exchanger
thermistor.
Replace the room
temperature thermistor.
Replace the room
temperature thermistor or
indoor unit heat exchanger
thermistor.
Do the vacuum-drying.
Replace the indoor unit PCB.
(R4760)
143