Problem Solution - Electrolux MSG-07HRIN2 Service Manual

10.3

Problem Solution

Problem
Not operating
Module protection
Compressor top
protection against
temperature
Open or short circuit
of outdoor
temperature sensor.
Open or short circuit
of indoor temperature
sensor.
Over load or too low
voltage protection.
Fan speed out of
control.
Zero-crossing
examination error
EEPROM data error
Indoor/outdoor units'
communication
protection.
24
Cause
Power failure
Transformer failure
Indoor main control board failure Replace it after checked failure.
The frequency converter module
protect against current、voltage
and temperature for 4 times
within 1 hour.
Lack of refrigerant.
Over-current protector failure.
Outdoor main control board
failure.
Temperature sensor failure.
Outdoor main control board
failure.
Temperature sensor failure.
Indoor main control
failure.
Power failure.
Power control board failure.
Wiring failure.
Indoor fan motor failure.
Indoor main control
failure.
Indoor main control
failure.
Indoor main control
failure.
Wiring failure.
Inverter control board failure.
Outdoor main control board
failure.
Indoor main control
failure.
Outdoor power control board
failure.
Service manual
Check the power cord.
Check the input and output on transformer.
Replace it if failure.
Check wiring. Correct if there is any wrong
connection.
Check the sequence of compressor wiring.
Correct if in wrong sequence.
Check the resistance between P-N、P-U、P-V、
P-W、 N-U、 N-V、 N-W on inverter control board.
Replace if any one of this group is fault.
Replace the compressor after checked failure.
Check
Correct and recharge if there is any leakage in
the refrigerant system.
Check
over-current protector. Replace if failure.
Replace it after checked failure.
Replace after checked failure.
Replace after checked failure.
Replace after checked failure.
board Replace after checked failure.
Wait if checked the power failure is really too
low.
Replace after checked failure.
Correct if the wiring of indoor fan motor is
loosen.
Check the input of indoor fan motor. Replace if
failure.
board Replace after checked failure.
board Replace after checked failure.
board Replace after checked failure.
Check wiring. Correct if there is any wrong
wiring or the wiring is loosen.
Replace after checked failure, no +5V power.
Replace if the LED is not on.
board Replace if the photo coupler on indoor main
control board is failure.
Replace if the photo coupler on outdoor main
control board is failure.
Remedy
leakage. Recycle
the resistance of
the refrigerant.
compressor