Daikin 2MXS40H2V1B Service Manual page 216

Troubleshooting for Outdoor Unit
Troubleshooting
Check No.15
Refer to P.212
Check No.17
Refer to P.215
Check No.18
Refer to P.215
Check No.22
Refer to P.217
205
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output
overcurrent after the wires have been disconnected and reconnected for part replacement, check the
wiring again.
Check No. 17
Check the installation condition.
Stop valve fully open?
YES
Turn off the power and turn it on
again to start the system. See if the
same error occurs.
Error again?
YES
Turn off the power and disconnect
the harnesses U, V, and W.
Check No.15
Check with the inverter analyzer.
Any LED off?
NO
Check No. 22
Check the power module.
Normal?
YES
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Check the power supply voltage.
Voltage as rated?
YES
Short circuit or
wire breakage between
compressor's coil
phases?
NO
Check No. 18
Check the discharge pressure.
NO
NO
Monitor the power supply voltage,
discharge and suction pressures,
and other factors for a long term.
Possible causes
∗
Momentary fall of power supply
voltage
∗
Compressor overload
∗
Short circuit
∗ Inverter analyzer:
RSUK0917C
YES
NO
NO
YES
SiBE121123_A
Fully open the stop valve.
Keep on using.
Check the connectors and
other components.
Correct the power supply
or replace the outdoor unit
PCB.
Replace the outdoor unit
PCB.
Correct the power supply.
Replace the compressor.
(R18321)
Service Diagnosis