TCL TAC-18CSD/XA81I

TCL Air Conditioner Service Manual
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35
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3.2 Trouble shooting
3.2.1 E0 ---IDU & ODU communication failure
Start
Dis
p
la
y
E0
IDU wiring
connection correct ?
Check communication,
earth wiring and the
connection, in good
condition?
ODUwiring
Connection correct?
Yes
Check and
re-connect
No
Main power supply
from IDU?
Yes
No
Replace/
re-connect
Check and
re-connect
No
Check voltage from IDU
terminal btw L,N. is there
220V?
Re
p
lace IDU PCB
No
Yes
Yes
Is the ODU PCB
LED5 ON?
Re
p
lace ODU PCB
Check voltage from IDU
terminal btw L,N. is there
220V?
Check the power
supply connection
Replace or
reconnect
Yes
Is the ODU PCB
LED5 ON?
Yes
Re
p
lace ODU PCB
No
No
No
End
ON constantl
y
Flash
Flash or not?
No
Yes
Yes
E0 disappear?
Yes
No
E0 disappear?
No
Yes
E0 disappear?
No
No
Yes
E0 disappear?
Yes
No
First replace
IDU PCB
E0 disappear?
Yes
No
First replace IDU
PCB
E0 disappear?
Yes
Re
p
lace ODU PCB
E0 disappear?
Yes
No
No
Yes
Re
p
lace ODU PCB
E0 disappear?
Yes
No
Yes