Mitsubishi PCA-RP140KAQ Manuel de service télécharger pdf (Page 23)

Error Code

Abnormal point and detection method

Cause

Countermeasure

1 Contact failure, short circuit or,

miswiring (converse wiring) of

indoor/outdoor unit connecting

wire

2 Defective transmitting receiving

circuit of indoor controller board

3 Defective transmitting receiving

circuit of indoor controller board

4 Noise has entered into indoor/

outdoor unit connecting wire.

* Check LED display on the outdoor control

circuit board. (Connect A-control service

tool, PAC-SK52ST.)

Refer to outdoor unit service manual.

1 Check disconnection or looseness of indoor/

outdoor unit connecting wire of indoor unit or

outdoor unit.

Check all the units in case of twin triple

indoor unit system.

2-4 Turn the power off, and on again to check.

If abnormality generates again, replace

indoor controller board or outdoor

controller circuit board.

* Other indoor controller board may have

defect in case of twin triple indoor unit

system.

Indoor/outdoor unit communication

error (Transmitting error)

Abnormal if “1” receiving is detected 30

times continuously though indoor controller

board has transmitted “0”.

1 Defective transmitting receiving

circuit of indoor controller board

2 Noise has entered into power

supply.

3 Noise has entered into outdoor

control wire.

1-3 Turn the power off, and on again to check.

If abnormality generates again, replace

indoor controller board.

Indoor/outdoor unit communication

error (Signal receiving error)

1 Abnormal if indoor controller board

cannot receive any signal normally for 6

minutes after turning the power on.

2 Abnormal if indoor controller board

cannot receive any signal normally for 3

minutes.

3 Consider the unit abnormal under the fol-

lowing condition: When 2 or more indoor

units are connected to an

outdoor unit, indoor controller board

cannot receive a signal for 3 minutes

from outdoor controller circuit board, a

signal which allows outdoor controller

circuit board to transmit signals.

Indoor controller board

Abnormal if data cannot be read normally

from the nonvolatile memory of the indoor

controller board.

1 Defective indoor controller

board

1 Replace indoor controller board.

Remote controller control board

1 Abnormal if data cannot be read nor-

mally from the nonvolatile memory of the

remote controller control board.

(Error code: E1)

2 Abnormal if the clock function of remote

controller cannot be operated normally.

(Error code: E2)

1 Defective remote controller 1 Replace remote controller.

Forced compressor stop

(due to water leakage abnormality)

1 The unit has a water leakage abnor-

mality when the following conditions, a)

and b), are satisfied while the above-

mentioned detection is performed.

a) The intake temperature subtracted

with liquid pipe temperature detects

to be less than -10: for a total of

30 minutes. (When the drain sensor

is detected to be NOT soaked in the

water, the detection record of a) and b)

will be cleared.)

b) Drain float switch detects to be in the

water for more than 15 minutes.

*Once the water leakage abnormality is

detected, abnormality state will not be

released until the main power is reset.

1 Drain pump trouble

2 Drain defective

· Drain pump clogging

· Drain pipe clogging

3 Open circuit of float switch

4 Contact failure of float switch

connector

5 Dew condensation on float

switch

· Drain water descends along

lead wire.

· Drain water waving due to

filter clogging.

6 Extension piping connection

difference at twin, triple, quad-

ruple system.

7 Miswiring of indoor/outdoor

connecting at twin, triple, quad-

ruple system.

8 Room temperature thermistor/

liquid pipe temperature thermis-

tor detection is defective.

1 Check the drain pump.

2 Check whether water can be drained.

3 Check the resistance of the float switch.

4 Check the connector contact failure.

5 Check the float switch leadwire mounted.

Check the filter clogging.

6 Check the piping connection.

7 Check the indoor/outdoor connecting wires.

8 Check the room temperature display of

remote controller.

Check the indoor liquid pipe temperature

display of outdoor controller board.

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Mitsubishi PCA-RP140KAQ Manuel de service Page 23

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