Daikin 4MXL-T Series Service Manual page 202

Troubleshooting for Outdoor Unit
Troubleshooting
196
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
Any thermistor
disconnected?
NO
Stop valve
closed?
NO
Check for refrigerant shortage.
Oil leak at relay
pipe connections?
NO
Oil leak at
internal piping?
NO
A
Go to the next page
NG
NG
YES
∗ Discharge pipe thermistor
∗ Indoor or outdoor heat exchanger thermistor
∗ Room temperature thermistor
∗ Outdoor temperature thermistor
YES
YES
YES
Compressor
vibrating too much?
YES
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.
Reconnect the thermistor(s).
Open the stop valve.
Repair the pipe flare or
replace the union.
NO
Check if any harnesses are
in contact with the piping
and correct as required.
Also, replace any cracked
pipes.
Check the connection of the
power transistor harness.
Also, replace any cracked
pipes.
Part 6 Service Diagnosis
R6000442