Service Manual -
VMH 9/12/18/24 SU & VMH30/36S D Series
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9.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1)
Error Code
E1
Malfunction condition
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Possible
causes
●
Wiring
error
●
Indoor or outdoor PCB faulty
Trouble shooting:
Check the outdoor wiring connection.
Is the wiring correct?
Check the indoor wiring connection.
Is the wiring correct?
Check reactor OHM
between terminals
∞
to ground