innovair PIN413C2V31 Service Manual page 37

10.3.2 Indoor / outdoor unit's communication diagnosis and solution(E1)
Error Code
Malfunction decision
conditions
Supposed causes
Trouble shooting:
Power off, then turn on the unit 5 seconds
later(reconnect the power wire).Is the error
still displaying after several minutes?
Measure Vs, is it moving alternately
with positive value?
(Vs is the voltage between L2 and S
of outdoor unit. Connect the red pin of
multimeter with L2 port, black pin with
S port)
Check all the wiring with outdoor
u n i t s . Is the wiring to the outdoor
m a i n PCB connect e d correctly? I s
the reactor connected well?
M e a s u r e t h e r e s i s t a n c e o f t h e
reactor(The one without capacitor).
If it is zero ,follow the below step. If
not, replace a new reactor.
Replace the outdoor main PCB.
Power on. Is the error extinguished?
Replace the indoor main PCB.
E1
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Wiring mistake
●
Indoor or outdoor PCB faulty
●
Yes
Yes
Yes
Yes
No
No
Check all the wiring with indoor units.
Is the wiring to the indoor main PCB
connected correctly?
Yes
Replace the indoor main PCB.
Power on. Is the error extinguished?
No
Replace the outdoor main PCB.
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