Midea Mini VRF Service Manual

MCAC-VTSM-2016-02 R410A All DC Inverter Mini VRF
Troubleshooting 75
4.14 P6: IPM Module protection
LED displays P6
IPM module protection
Check whether P-N voltage on the IPM module
is OK. The DC voltage is from 483 to 586V.
NO
Check whether the input power is
correct. The power is 380-415V,
3N, 50Hz.
NO
Adjust to the right
range. Then check
whether the system
runs normally.
YES
Check whether power
wiring is connected
correctly and firmly.
NO
Connect firmly again
and check whether it is
connected right.
NO
YES
Check whether wiring
connection of E part is
connected firmly.
NO
Connect firmly again and
check whether it is connected
correctly.
NO
YES
Check if rectifier bridge is normal
or not.
NO
Replace rectifier.
NO
YES
Check each reactor is
connected normally. If wiring
is damaged, the resistance of
two ports is ∞.
NO
Replace connecting
wire.
YES
Check if wiring connection
between main PCB and IPM
module is fastened or not.
YES
Check whether wiring
connection of the
compressor is connected
right and firmly.
YES
Replace IPM module and
check whether the system
can operate normally or not..
NO
Replace main PCB and
check whether the system
can operate normally or not..
YES
Solve the
malfunction.
NO
Replace compressor and
check whether the system
can operate normally or
not.
Connect firmly
again and
check whether
it is connected
correctly.
NO
Connect well
again and
check whether
it is connected
correctly.
。
NO
YES
Solve the problem
NO
NO
YES
Solve the
malfunction.
YES
Check the fuse on the power
board is normal or not.
NO
Replace the
same model
fuse.
YES
Replace the power
board.

Midea Mini VRF Specifications

General

Brand	Midea
Model	Mini VRF
Category	Air Conditioner
Language	English