Indoor/Outdoor Unit’s Communication Diagnosis And Solution - Century B-VMH36SD-1 Service Manual

Service Manual - VMH 9/12/18/24 SU & VMH30/36S D Series
9.3.2 Indoor / outdoor unit's communication diagnosis and solution(E1)
Error Code
Malfunction condition
Possible causes
Trouble shooting:
E1
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Wiring error
●
Indoor or outdoor PCB faulty
●
Check the outdoor wiring connection.
Is the wiring correct?
Check reactor OHM
between terminals
∞ to ground
30
Check the indoor wiring connection.
27
Is the wiring correct?