DM12-01.01.09en Oasis On-off
Service manual 55
11.2.6 Indoor / outdoor units communication error
Yes
No
No
Change the indoor PCB
Change the outdoor PCB
Power on. Is the E1 extinguished
after 3 minutes?
Yes
Power on. Is the E1 extinguished
after 3 minutes?
Change the outdoor PCB
Yes
Power off, then power on the A/C by
the breaker. (reconnect the power
wire). Is the E1 extinguished?
Check the wiring on the outdoor
terminal and indoor terminal follow
the wiring diagram. Is all the
connecting correctly?
-24V<Vs<+24V?
(Vs is the voltage between S and N).
No
Is the wiring to the outdoor PCB
connecting correctly?
Is the wiring to the indoor PCB
connecting correctly?
No
Change the indoor PCB
Yes
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