Daikin B-Series Service Manual page 201

Troubleshooting
Troubleshooting
Check No.04
Refer to P.217
Check No.06
Refer to P.219
190
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.
Motor functioning?
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
Si12-714
Activate the wiring error
check mode.
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 and then start the
wiring error check mode.
(R4715)
Service Diagnosis