Midea MIV V4+ Mini Service Manual page 45

DM12-01.01.05en
12) P6 malfunction
LED indicates P6
IPM protection
Check whether the voltage range of P-N
on IPM module is normal? DC 310-650V
Yes
Check whether the connecting
line between main board and
the IPM module is connected
tightly
Yes
Check whether the
connecting line of the
compressor is connected
tightly
Yes
Replace the IPM module,
check whether the system
can work normally?
No
Replace the main board, check
whether the system can work
normally?
No
Replace the compressor, check
whether the system can work
normally?
Outdoor units
No
Check whether the input power
supply is correct? 380-415V, 3N,
50Hz 220V-240V,1N,50Hz
Connect it
tightly, check
ok or not?
No
No
Connect it
tightly, check
ok or not?
Check whether the three phase
bridge is normal?
Yes
Trouble is solved
Yes
Trouble is solved
Yes
Trouble is solved
MIV V4+ Mini DC Inverter R410A (220V, 8 kW)
Yes
Check whether the power
supply line is connected
correctly and tightly
Yes
Check whether the lines in
E-part box are connected
tightly
Yes
Yes
Check whether the
3300µF/450V electrolytic
capacitor is normal?
Regulate it to correct,
No
then check whether
the system can work
normally?
No
No
Connect it correctly and
tightly, check ok or not?
No
Connect it tightly,
check ok or not?
No Replace the three
phase bridge
No
Replace this electrolytic
capacitor
No
No
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