TCL TAC-18CSD/XA81I

TCL Air Conditioner Service Manual
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43
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3.2.9 P0---IPM protection
When overheat or overcurrent for IPM, AC unit will display P0protection.
Can compressor
start up?
Wiring connection
U/V/W correct?
Re-connect
Re
p
lace ODU PCB
Re
p
lace ca
p
illar
y
Clean it
ODU fan motor no
works or too slowly?
Replace ODU
f
a
n m
otor
Yes
Replace compressor
End
Yes
No
Yes
P0 disappear?
test voltage btw
U/V/W , (normally
from DC 20~200V.)
Unit works
normal?
Turn unit on to check
whether the malfunction
is eliminated.
AC pressure correct?
(cooling:0.8-1.3Mpa,/
heating 2.0-3.6Mpa)
Is the condenser
and/or evaporator
too dirty?
Capillary
blocked?
P0 disa
pp
ear?
Works normal?
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
No
No
No
Dis
p
la
y
P0
Restart unit. It
w
orks normal?
No
No
Yes
No
No