Midea LRSJF-V120

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)
C. "E2": UI communication error
Wire
controller
Display
E2
Method of
malfunction
detection
Check whether communication cable is normal
Supposed
Causes
1. Communication cable doesn’t connect correctly.
2. External factor other than malfunction.
Troubleshooting
E2
Turn the power supply off
once and then back on
Is normal reset
possible?
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 (EMI, etc.) other than malfunction
Replace the main control board.
Continue operation
YES
NO
YES
NO