Trouble Shooting - Aiwa -09CHSRINV/TP11 Service Manual

3.2 Trouble shooting

3.2.1 E0 ---IDU & ODU communication failure
Start
Display E0
IDU wiring
connection correct ?
Yes
Check communication
wiring and the connection,
in good condition?
ODU wiring
Connection correct?
Main power supply
from IDU?
Yes
Check voltage from IDU
terminal btw L,N. is there
220V?
Yes
Is the ODU PCB
LED5 ON?
No
Flash
Replace ODU PCB
Air Conditioner Service Manual
No
Check and re-
No
Replace/ re-
connect
Yes
No
Check and re-
n
Yes
No
No
Replace IDU
No
E0 disappear?
Yes
ON
constantly
No
connect
E0 disappear?
connect
Check voltage from IDU
terminal btw L,N. is there
220V?
Replace IDU
PCB
PCB
Yes
Is the ODU PCB
LED5 ON?
Replace ODU PCB
End
Yes
E0 disappear?
No
Yes
No
Yes
E0 disappear?
No
No
Check the power
supply connection
Yes
Replace or
reconnect
E0 disappear?
No
Yes
ON
Flash
constantly
No
Yes
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