Midea CE-LRSJF-V80/N1-310

MCAC-RTSM-2012-01 M-thermal Technical Manual (part 2)
C. "E3": Communication error of outdoor chip and DSP
Outdoor Unit
Display
E3
Method of
malfunction
detection
Check whether communication cable between chip and DSP is not connected
well.
Supposed
Causes
1. Communication cable between chip and DSP is not connected well..
2. External factor other than malfunction.
Troubleshooting
E3
Turn the power supply off
once and then back on
Is normal reset
possible?
Turn the power supply off and
connect the communication
cable correctly, turn the power
on again, is”E3”displayed?
Problem could be cause by External
factor (noise, etc.) other than
malfunction
Replace the main control board.
Continue operation
YES
NO
YES
NO