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28
DIAGNOSIS AND SOLUTION (CONT)
Indoor / outdoor unit’s communication diagnosis and solution (E1)
Error Code
E1
Malfunction Decision Conditions
Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition
happens four times continuously.
Supposed Causes
S Wiring mistake
S Indoor or outdoor PCB faulty
Troubleshooting
Measure Vs., is it a positive fluctuation?
(Vs represents the voltage S and N of the
outdoor unit. Red pan-S, Black pan-N)
Power off, then restart the unit 2 minutes later
Replace the indoor main PCB.
Power on. Is the error resolved?
No
Check the indoor wiring connection
Yes
Check whether the
reactor is normal
Yes
No
Check the outdoor wiring connection
Replace the reactor
Yes
Replace the outdoor main PCB.
Power on. Is the error resolved?
Replace the indoor main PCB
No
Replace the outdoor main PCB.
Yes
No
Yes
Yes
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