Troubleshooting - Mitsubishi Electric Mr.SLIM SLZ-KA25VA Technical & Service Manual

7

TROUBLESHOOTING

7-1. CAUTIONS ON TROUBLESHOOTING
(1) Before troubleshooting, check the followings:
1Check the power supply voltage.
2Check that the indoor/outdoor connecting wire is correct.
(2) Take care of the followings during servicing.
1 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.
2 When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the
components.
3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires.
7-2. SELF-CHECK
7-2-1. Wired remote controller
B E D
ERROR CODE
TEMP. ON/OFF
C
MENU ON/OFF
BACK MONITOR/SET DAY
PAR-21MAA CLOCK OPERATION
G
7-2-2. Wireless remote controller
h
ON/OFF
TOO TOO
WARM COOL
56
FAN SELECT
AUTO COOL
VANE TIME
HEAT DRY
MODE
24
RESET
Lead wire
ERROR CODE
E
B
FILTER
CHECK TEST
ERROR CODE
CLEAR
A
[Procedure]
1 Turn ON the power.
2 While pressing both the MODE SELECT button and
3 Firstly, release the RESET button.
24
4 And release the other 2 buttons since all LCD in
5 Transmit the signal of remote controller, pressing ON/ OFF
23
6
1 Turn on the power.
2 Press the [CHECK] button twice.
3 Set address with [TEMP] button if system control is used.
4 Press the [ON/OFF] button to stop the self-check.
A CHECK button
B Address
C TEMP. button
D IC : Indoor unit
OC: Outdoor unit
E Check code
F Unit No.
G Timer ON/OFF button
<To delete check code>
F
1 Display the error code on the self-check result display screen.
2 The address for self-check will blink when the
button is pressed twice within 3 seconds.
TOO COOL button on the remote controller at the same
time, press the RESET button.
operation display section of the remote controller is
displayed after 3 seconds.
button on the remote controller.
(The above procedure allows OPERATION
to indicate the failure-mode.)
Transmit the signal of remote controller, pressing ON/ OFF
button to stop the self-check.
OPERATION INDICATER
13
– – – – : No trouble generated in the past.
F F F F : No corresponding unit.
INDICATOR lamp
G
ON/OFF