•When cooling, heat exchanger of
•When heating,
(LED display: 00, p1)
D Check of LEV
Start
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 a hand?
No
Disconnect the connector
(CN791: unit A, CN792: unit B, CN793: unit C,
CN794: unit D), and measure the resistance of LEV coil to check the integrity.
No
Replace the LEV coil.
Yes
Nomal
Yes Replace the electronic control P. C. board
•When heating, room does not get warm.
•When cooling, room does not get cool. (LED display: 00, a8)
E Check of inverter/ compressor
Start
Disconnect the lead wire to the compressor at terminals, and turn on power supply to the indoor and outdoor unit. Three minutes later, EMERGENCY OPERATION starts.
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Measure the voltage between |
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each leading to the compressor. | • The output voltage values in the above table have the tolerance of i20%. | ||||||||||||||||
U (BLK) - V (WHT) |
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V (WHT) - W (RED) |
| No | LED indicator the inverter | No |
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W (RED) - U (BLK) |
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Output voltage |
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COOL: 100V(58Hz) HEAT: 100V(58Hz) |
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Is voltage output? W1 |
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Is output balanced? | No |
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Turn off power supply of indoor and outdoor unit, |
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and measure the compressor winding resistance |
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between the compressor terminals. |
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the each terminals? |
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Return the lead wire of compressor to former, and |
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turn on power supply to indoor and outdoor unit. |
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Three minutes later EMERGENCY OPERATION starts. |
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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
0"
Replace the relay P. C. board.
Check the resistance HPS (63H2).
Infinite
Replace the
HPS (63H2).
31
