(R14418)
Caution
NO
YES
NO
YES
NO
YES
YES
NO
NO
YES
YES
NO
Monitor the supply voltage,
discharge and suction pressures,
and other factors for a long term.
Possible causes
∗ Momentary fall of supply voltage
∗ Compressor overload
∗ Short circuit
∗ 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. 18
Check the discharge pressure.
Check the supply voltage.
Turn off the power, and reconnect
the harnesses. Turn on the power
again and start operation.
Check No. 22
Check the power module.
Check No. 15
Check with the inverter checker (∗).
Turn off the power and disconnect
the harnesses U, V, and W.
Turn off the power and turn it on
again to start the system. See if the
same error occurs.
Check No. 17
Check the installation condition.
Keep on using as it is.
Check the connectors and
other components.
Fully open the stop valve.
Correct the power supply.
Replace the compressor.
Correct the power supply or
replace the PM1.
(Replace the outdoor unit
PCB.)
Replace the PM1.
(Replace the outdoor unit
PCB.)
∗ Inverter checker
Part No.: 1225477
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Short circuit or wire
breakage between
compressor's coil
phases?
Voltage as rated?
Normal?
Any LED off?
Error again?
Stop valve fully open?
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