Airwell ELECTRA JKD DCI Series Service Manual page 53

TROUBLE SHOOTING
10.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution (E1)
Power off, then turn on the unit 5 seconds
later(reconnect the power wire).Is the error
still displaying after several minutes?
Yes
Check all the wirings between indoor and
outdoor, indoor main PCB and outdoor main
PCB following the wiring diagram. Are all
the wirings connected correctly?
Yes
Measure Vs, is it moving alternately
between positive value and negative
value?
(Vs is the voltage between S and N of
outdoor unit.)
Yes
Is the wiring to the outdoor m a i n
PCB connected correctly?
Yes
Change the outdoor main PCB.
Power on. Is the error extinguished?
Change the indoor main PCB.
JKD DCI
No
No
Is the wiring to the indoor main
PCB connected correctly?
Yes
Change the indoor main PCB.
Power on. Is the error extinguished?
No
Change the outdoor main PCB.
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