Mitsubishi Electric PLA Series Service Manual page 17

9-2. MALFUNCTION-DIAGNOSIS METHOD BY REMOTE CONTROLLER
<In case of trouble during operation>
When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform
unusual stop.
<
Malfunction-diagnosis method at maintenance service>
CHECK
CHECK
display
TEMP
ON/OFF
ON/OFF
button
FAN AUTO STOP
AUTO START
MODE VANE
CHECK LOUVER
CHECK
TEST RUN
button
SET RESET CLOCK
OCH529A
[Procedure]
1. Press the CHECK button twice.
Refrigerant
address
display
2. Press the temperature
buttons.
Temperature
button
3. Point the remote controller at the
HOUR
sensor on the indoor unit and
button
press the HOUR button.
h
min
4. Point the remote controller at the
sensor on the indoor unit and
press the ON/OFF button.
17 17
• "CHECK" lights, and refrigerant address
"00" flashes.
• Check that the remote controller's dis-
play has stopped before continuing.
• Select the refrigerant address of the
indoor unit for the self-diagnosis.
Note: Set refrigerant address using the
outdoor unit's DIP switch (SW1).
(For more information, see the out-
door unit installation manual.)
• If an air conditioner error occurs, the
indoor unit's sensor emits an intermittent
buzzer sound, the operation light flashes,
and the check code is output.
(It takes 3 seconds at most for check
code to appear.)
• The check mode is cancelled.