Check Of Lev - Mitsubishi Electric MXZ-2B20NA Service Manual

• When cooling, heat exchanger of non-operating indoor unit frosts.
• When heating, non-operating indoor unit gets warm.

Check of LEV

Turn ON the power supply to the outdoor unit after checking LEV coil is
mounted to the LEV body securely.
Is "click - click" sound heard ?
Or, do you feel vibration of LEV coil with your hand ?
No
Disconnect the connectors.
MXZ-2B
CN791: LEV A, CN792: LEV B, CN795: LEV E
MXZ-3B/4B/5B
CN791: LEV A, CN792: LEV B, CN793: LEV C,
CN794: LEV D (MXZ-4B/5B), CN795: LEV E
(MXZ-5B), CN796: LEV F (MXZ-3B/4B),
CN797: LEV M (MXZ-5B)
Is there normal resistance to LEV coil ?
(Refer to 11-5.)
No
Replace LEV coil.
OBH560G
Yes
Normal
Yes
Replace the electronic control P.C. board/outdoor
control P.C. board..
70
MXZ-2B/
MXZ-5B
3B/4B
CN791
CN792
Outdoor
Electronic
CN793
control
control
CN794
P.C. board P.C. board
CN795
CN796
CN797