42
11
SERVICE FUNCTIONS
CHANGE IN DEFROST SETTING
<JS> When the JS wire of the outdoor inverter P.C. board is cut, the defrost temperature is changed.
(Refer to page 66.)
Jumper wire
Change point
Deforst finish temperature changes from 5
:
to 8
:
.
JS
12
TROUBLESHOOTING
12-1-3. Troubleshooting procedure
For SLZ/SUZ
1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.
To make sure, check how many times the abnormality indication is flashing on and off before starting service work.
2) Before servicing check that the connector and terminal are connected properly.
3) If the inverter P.C. board or electronic control P.C. board is supposed to be defective, check the copper foil pattern for
disconnection and the components for bursting and discolouration.
4) When troubleshooting, refer to the flow chart on page 43 for SLZ-A09AR.TH, SLZ-A12AR.TH, SUZ-A09VR.TH and
SUZ-A12VR.TH and page 45 for SLZ-A18AR.TH and SUZ-A18VR.TH.
For SEZ/SUZ
1) First, check if the OPERATION lamp on the remote controller is flashing and off to indicate an abnormality.
To make sure, check the ERROR CODE on the remote controller.
2) Before servicing check that the connector and terminal are connected properly.
3) If the inverter P.C. board or electronic control P.C. board is supposed to be defective, check the copper foil pattern for
disconnection and the components for bursting and discolouration.
4) When troubleshooting, refer to the flow chart on page 44 for SEZ-A09CR.W, SEZ-A12AR.TH, SUZ-A09AR.TH and
SUZ-A12AR.TH and page 46 for SEZ-A18AR.W, SEZ-A24AR.TH, SUZ-A18AR.TH and SUZ-A24AR.TH.
12-1. Cautions on troubleshooting
12-1-1. Before troubleshooting, check the following:
1) Check the power supply voltage.
2) Check the indoor/outdoor connecting wire for mis-wiring.
12-1-2. Take care the following during servicing.
1) Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then after
confirming 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 inverter
control P.C. board or electronic control P.C. board.
3) When removing the electrical parts, be careful to the residual voltage of smoothing capacitor.
4) When removing the inverter 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 housing of the connector. DO NOT pull the lead wires.
Housing point
Lead wiring
SUZ-A09VR.TH
SUZ-A12VR.TH
SUZ-A09VR.TH SUZ-A12VR.TH SUZ-A18VR.TH SUZ-A24VR.TH
OC304A --2qxp 04.6.29 8:33 AM Page 42
