39
When OPERATION INDICATOR lamp flashes 5-time.
• When heating, room does not get warm.
• When cooling, room does not get cool.
Check of LEV
No
Yes
No
Yes
Turn ON 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 the LEV coil with hands?
Disconnect the connector CN795.
Is there normal resistance to LEV coil?
Normal
Replace the outdoor electronic
control P.C. board.
Replace the LEV coil.
• When cooling, heat exchanger of non-operating indoor unit frosts.
• When heating, non-operating indoor unit gets warm.
How to check inverter/compressor
No
No
Yes
Yes
Yes
No
Yes
No
Disconnect the terminal of the compressor.
3 minutes after turning ON the power supply, start
EMERGENCY OPERATION.
Is output balanced?
Clarify the causes by counting time until the inverter stops.
0 to 10 seconds: compressor rare short
10 to 60 seconds: compressor lock
60 seconds to 5minutes: refrigerant circuit defective
5 minutes or more: normal
Measure the voltage between each
lead wire leading to the compressor.
U (BLK) - V (WHT)
V (WHT) - W (RED)
W (RED) - U (BLK)
Is there output voltage?
Turn OFF power supply of indoor and outdoor
unit, and measure the compressor winding
resistance between the compressor terminals.
Is the resistance between each terminal normal?
Is the input voltage to the outdoor electronic
control P.C. board 370V or more?
Reconnect the lead wire of compressor, and turn ON
power supply to indoor and outdoor unit.
3 minutes later, start EMERGENCY OPERATION.
Replace the
compressor.
Replace the power board.
• After the outdoor fan starts running, wait for 1 minute or more before
measuring the voltage.
• The output voltage values have the tolerance of ± 20%.
Summary of Contents for MUZ-GA50VA-E1
Page 10: ...10 MUZ GA60VA E3 ...
