188
DC Inverter Multi
VRF Service Manual
1) The LCD will display current protection upon startup.
Yes
Yes
Yes
No
No
Current protection
Is voltage of power
supply normal？
Disconnect compressor
wire Restart the unit
Is there overcurrent
protection？
Replace compressor
Note：DC inverter unit can not be tested by
disconnecting the compressor wire
Replace the damaged module
Adjust parameter of power supply
2) The LCD will display current protection after it runs for a while.
Yes
Yes
Yes
Yes
No
No
No
Inspect match of
indoor unit
Within 135%
Adjust the indoor
unit to suitable capacity
Inspect charging volume?
Adjust it to be within
the permitted range
Over charge
Voltage of DC
monitoring module P, N
Voltage is kept
within 252~330V, without
10V or more variation.
Replace the damaged
DC capacitor
Compressor and module
are damaged
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