Troubleshooting - Mitsubishi Electric SLZ Series Technical & Service Manual

7

TROUBLESHOOTING

7-1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
Check the power supply voltage.
Check that the indoor/outdoor connecting wire is correct.
(2) Take care of the followings during servicing.
Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn
off the breaker.
When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
7-2. SELF-CHECK
Wireless remote controller
h
ON/OFF
TOO TOO
WARM COOL
56 24
FAN SELECT
AUTO COOL
VANE TIME
HEAT DRY
MODE
24
RESET
23
OCH564
Lead wire
7-2-1. WIRED REMOTE CONTROLLER
For details, refer to the installation manual that comes with each remote controller.
7-2-2. WIRELESS REMOTE CONTROLLER
1 Turn ON the power.
2 While pressing both the MODE SELECT button and
TOO COOL button on the remote controller at the same
time, press the RESET button.
3 Firstly, release the RESET button.
4 And release the other 2 buttons since all LCD in
operation display section of the remote controller is
displayed after 3 seconds.
5 Transmit the signal of remote controller, pressing ON/ OFF
button on the remote controller.
(The above procedure allows OPERATION INDICATOR lamp
to indicate the failure-mode.)
6 Transmit the signal of remote controller, pressing a button other
than ON/ OFF button or VANE button to stop the self-check.
13
OPERATION INDICATER