MCAC-RTSM-2012-01 M-thermal Technical Manual (part 2)
B. "E2": Communication error of the outdoor chip and the indoor chip
Method of
malfunction
detection
Check whether communication cable is normal
1. Communication cable doesn’t connect well.
2. External factor other than malfunction.
Turn the power supply off
Turn the power supply off and
make sure the communication
cable is in well connection,
turn the power on again,
is”E2”displayed?
Problem could be cause by External
factor (noise, etc.) other than
malfunction
Replace the main control board.
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