Daikin 2MXS40H2V1B Service Manual page 190

Troubleshooting for Outdoor Unit
Troubleshooting
Check No.01
Refer to P.206
Check No.12
Refer to P.210
Check for refrigerant shortage.
Change for a specified amount of
fresh refrigerant.
179
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Any thermistor
disconnected?
NO
Stop valve closed?
NO
Oil oozing at relay
pipe connections?
NO
Oil oozing at internal
piping?
NO
Check No. 12
Outdoor electronic
expansion valve
functioning?
YES
Refrigerant shortage error
again?
NO
YES
∗ Discharge pipe thermistor
∗ Indoor or outdoor heat exchanger thermistor
∗ Room temperature thermistor
∗ Outdoor temperature thermistor
YES
YES
YES
Compressor vibrating
too much?
NO
NO
YES
Check No. 01
Check the thermistors.
OK
Replace the outdoor unit PCB.
Error again?
NO
SiBE121123_A
Replace the thermistor(s)
position.
Open the stop valve.
Repair the pipe flare or
replace the union.
YES
Check the harness for
loosening.
Correct it as required. Also
replace the cracked pipe.
Check the pipes for
improper contact. Correct
them as required. Also
replace the cracked pipe.
Replace the outdoor
electronic expansion valve.
NG
Replace the defective
thermistor(s).
YES
Replace the compressor.
Completed.
Completed.
(R17254)
Service Diagnosis
in