41
10
TROUBLESHOOTING
10-1. CAUTIONS ON TROUBLESHOOTING
1. Before troubleshooting, check the following
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for miswiring.
2. Take care of the following during servicing
1) Before servicing the air conditioner, be sure to turn OFF the main unit first with the remote controller, then after con-
firming the horizontal vane is closed, turn off the breaker and/or disconnect the power plug.
2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic
control P.C. board.
3) When removing the electrical parts, be careful of the residual voltage of smoothing capacitor.
4) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the
components.
5) When connecting or disconnecting the connectors, hold the connector housing. DO NOT pull the lead wires.
3. Troubleshooting procedure
1) Check if the OPERATION INDICATOR lamp on the indoor unit is blinking on and off to indicate an abnormality. To make
sure, check how many times the OPERATION INDICATOR lamp is blinking on and off before starting service work. (See
the service manual of the indoor unit for a description of those failure codes.)
2) Before servicing, check that the connector and terminal are connected properly.
3) When the electronic control P.C. board seems to be defective, check the copper foil pattern for disconnection and the
components for bursting and discoloration.
4) Refer to 10-2 and 10-3.
Lead wiring
<Incorrect>
Connector housing
<Correct>
MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA
MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA
MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA
MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA
MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA
OBH733G
Содержание MUY-GL09NA-U1
Страница 9: ...9 5 WIRING DIAGRAM MUZ GL09NA U1 U8 MUZ GL12NA U1 MUZ GL09NA U2 MUZ GL12NA U2 OBH733G ...
Страница 10: ...10 MUZ GL09NAH U2 MUZ GL12NAH U2 MUZ GL09NAH U1 U8 MUZ GL12NAH U1 OBH733G ...
Страница 11: ...11 MUY GL09NA U1 MUY GL12NA U1 MUY GL09NA U2 MUY GL12NA U2 OBH733G ...
Страница 12: ...12 MUZ GL15NA U2 MUZ GL15NA U1 OBH733G ...
Страница 13: ...13 MUZ GL15NAH U2 MUZ GL15NAH U1 OBH733G ...
Страница 14: ...14 MUY GL15NA U1 MUY GL15NA U2 OBH733G ...
Страница 15: ...15 MUZ GL18NA OBH733G ...
Страница 16: ...16 MUZ GL18NAH OBH733G ...
Страница 17: ...17 MUY GL18NA OBH733G ...
Страница 18: ...18 MUZ GL24NA OBH733G ...
Страница 19: ...19 MUZ GL24NAH OBH733G ...
Страница 20: ...20 MUY GL24NA OBH733G ...
Страница 75: ...75 OBH733G ...