MCAC-RTSM-2012-01 M-thermal Technical Manual (part 2)
E. "E5": Voltage protection error
Outdoor Unit
Display
E5
Method of
malfunction
detection
Check whether the power supply voltage is at normal range.
Supposed
Causes
1. The power supply voltage is too high or too low
2. Something wrong with the detecting element on the main board
Troubleshooting
E5
Measure the voltage, is at
the normal range?
Use a voltage regulator, adjust to
normal voltage,
turn the power on
again, is”E5”displayed?
Continue operation
YES
NO
Replace the main board
ON
YES
Replace the main board
