Troubleshooting Guide

Troubleshooting 35
Current protection of compressor
Was the protection activated
in standby?
Yes
Yes
Is the current normal
Yes
No
Replace the outdoor main PCB
Is the power voltage is
normal?
Is outdoor terminal voltage
normal
Restart the unit when the power
supply returns to normal
No
Yes
No
Reconnect the
power wiring
Yes
Is the voltage between L and
N is normal
Yes
Is the input voltage of the
bridge rectifier is normal
No
No
Is the power wiring
wired correctly?
Reconnect L and N
Are L and N wired
properly?
Reconnect the
bridge rectifier
Is the bridge
rectifier wired
properly?
No
No
Yes
Replace the PFC module (if this has not
been done already)
No
Is the voltage between P and
N normal refer according to
Appendix
Replace the bridge
rectifier
No
Is the bridge rectifier
functioning normally?
Is the wiring of the
reactor or inductance
properly wired?
Reconnect the
wiring
No
Are the reactor and
inductance functioning
normally
Yes
Replace reactor or
inductance
No
Is the outdoor ambient
temperature is higher than
50
?
No
Stop the unit
Yes
Is the outdoor unit
ventilation functioning
properly?
Yes
Ensure that the outdoor unit
ventilate is working properly
Is the heat exchanger dirty?
No
Clean the heat exchangerYes
Check whether the refrigerant
system is running normally
Replace outdoor main
board. Does a problem still
exist?
No
No
Is the outdoor fan running
properly?
Refer to the solution to the
malfunction of fan speed being out
of control. Find the cause and
resolve the issue
No
Yes
No
Yes
Yes
Is system pressure too high?
Recycle the overcharged
refrigerant
Yes