TCL U-MATCH-R32 Series

TCL U-MATCH-R32 SERIES DC INVERTER AIR CONDITIONERS SERVICE MANUAL
91
3.3.6 P0---IPM protection
When overheat or overcurrent for IPM, AC unit will display P0 protection.
Restart unit. It
Yes
works normal?
No
Wiring connection
No
U/V/W correct?
Yes
P0 disappear?
Yes
No
Can compressor
start up?
Yes
ODU fan motor no
works or too slowly?
Yes
Replace ODU
fan motor
No
No
No
Works normal?
Yes
test voltage btw
U/V/W , (normally
from DC 20~200V.)
Yes
No
Yes
AC pressure correct?
(cooling:0.8-1.3Mpa,/
heating 2.0-3.6Mpa)
No
Turn unit on to check
whether the malfunction
is eliminated.
No
Yes
Is the condenser
and/or evaporator
too dirty?
No
Yes
Clean it
Unit works
normal?
Yes
No
Replace compressor
No
Capillary
blocked?
Yes
Replace capillary
No
P0 disappear?
Yes
End
Display P0
Re-connect
Replace ODU PCB