Mitsubishi Electric MXZ-2B20NA Service Manual page 27

• When cooling, heat exchanger of non-operating indoor unit frosts.
• When heating, non-operating indoor unit get 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.
CN791: LEV A, CN792: LEV B, CN795: LEV E
Is there normal resistance to LEV coil ?
(Refer to 11-5.)
No
Replace LEV coil.
Yes
Normal
Yes
Replace the outdoor electronic control P.C. board.
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