E3": Communication Error Of Outdoor Chip And Dsp - Midea LRSJF-V120 Technical Manual

MCAC-RTSM-2012-07
C. "E3": Communication error of outdoor chip and DSP
Outdoor Unit
Display
Method of
malfunction
detection
Supposed
Causes
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?
NO
E3
Check whether communication cable between chip and DSP is not connected
well.
1. Communication cable between chip and DSP is not connected well..
2. External factor other than malfunction.
NO
Problem could be cause by External
YES
factor (noise, etc.) other than
malfunction
YES
Replace the main control board.
Continue operation
M-thermal Technical Manual (part 4)