11 TROUBLESHOOTING

1.TROUBLES IN TEST RUN

Symptom

 

Cause

 

 

Check points

 

 

 

 

 

 

The display “CENTRALLY

1)

Wrong address setting of remote con-

1) Check the address setting of remote controller

CONTROLLED” on remote

 

troller/indoor controller board.

and indoor controller.

 

 

controller does not disap-

2) Timer adapter is connected to the

2) Make sure the timer adapter is used correctly.

pear.

 

remote controller.

3) 1 Turn another remote controller’s DIP SW17-

 

3)

Signal transmission error between

 

7 ON to make it sub controller.

 

 

indoor unit and remote controller.

2 Connect the sub controller to the unit, and

 

 

 

 

turn circuit breaker ON.

 

 

 

 

 

● If the display “centrally controlled” disap-

 

 

 

 

pears, replace the original remote controller.

 

 

 

● If the display remains the same, replace the

 

 

 

 

indoor controller board.

 

 

 

 

 

 

When remote controller

1)

Signal transmission error between

1) 1 Connect a sub remote controller.

POWER button is turned

 

indoor unit and remote controller

2 Turn circuit breaker ON.

 

 

ON, the check code

 

 

 

If the display “centrally controlled” remains,

“E0”appears.

 

 

 

replace the indoor controller board.

 

 

 

3 If the display disappears, turn the remote

 

 

 

 

controller POWER button ON and check as

 

 

 

 

follows.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remote controller

Sub remote controller

Malfunction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

Operating Display

E0 Display

Malfunction of

 

 

 

 

 

indoor Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Operating Display

Operating Display

Malfunction of

 

 

 

 

 

Remote controller

 

 

 

 

 

 

 

 

 

 

 

 

 

3

No Display

E0 Display

Malfunction of

 

 

 

 

 

indoor Unit and

 

 

 

 

 

 

 

 

Remote Controller

 

 

 

 

 

4

No Display

Operating Display

Malfunction of

 

 

 

 

 

Remote controller

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When remote controller

1)

Short circuit of indoor/outdoor connect-

1), 2) Check the wire

 

 

POWER button is turned

 

ing wire

3) Turn the circuit breaker OFF, and then turn ON.

ON, operating display

2)

Short circuit of transmission wire.

If the remote controller remains abnormal,

appears, but disappears

3)

Wrong operation of remote controller

despite the above measures, replace the indoor

soon.

 

due to noise wave emitted by other

controller board.

 

 

 

 

 

appliances.

 

 

 

 

 

 

 

 

 

 

Despite turning POWER

1)

Damaged remote controller.

1) Measure the voltage between terminals of

button ON, the remote

2)

Short circuit of transmission wire.

remote controller. If no voltage, remove the ter-

controller display does not

3)

Bad contact of indoor CN40.

minals and measure the voltage between

appear.

4) CN40 is attached to a sub unit.

wires. If the voltage is between 6VDC and 12V,

 

5)

Damaged power board.

replace the remote controller.

 

 

 

6)

Bad contact of CN2D.

2) ~ 8) Check each point.

 

 

 

7)

Blown fuse.

 

 

If it is not defective, replace the indoor

 

8)

Circuit breaker OFF.

 

 

controller board.

 

 

 

 

 

 

 

 

 

 

 

OC194-36

Page 35 Page 37
Page 36
Image 36
Mitsubishi Electronics PL42FK21, PL36FK31, PL30FK21, PL18FK21, PL12FK1 Troubleshooting, OC194-36, Troubles in Test RUN
Page 35 Page 37

PL18FK21, PL30FK21, PL12FK1, PL36FK31, PL24FK21 specifications

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