Daikin 4MXL-T Series Service Manual page 224

Troubleshooting for Outdoor Unit
Troubleshooting
Reference
Check No.01 Refer to P.232
Reference
Check No.12 Refer to P.236
Reference
Check No.17 Refer to P.240
Reference
Check No.18 Refer to P.241
Reference
Check No.19 Refer to P.241
218
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Check the installation space.
Check No. 17
Check the installation
condition.
OK
Check No. 19
Check the outdoor fan.
OK
Check No. 18
Check the discharge
pressure.
OK
Check No. 12
Check the electronic
expansion valve.
OK
Check No. 01
Check the outdoor heat
exchanger thermistor.
OK
NG
NG
NG
NG
NG
SiUS121827E
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Replace the outdoor fan
motor.
Reconnect the connector or
fan motor lead wires.
Replace the stop valve.
Replace the electronic
expansion valve or the coil.
Replace the outdoor unit
PCB (main PCB).
Replace the outdoor heat
exchanger thermistor.
Replace the outdoor unit
PCB (main PCB).
(R20418)
Part 6 Service Diagnosis