Error Code

Abnormal point and detection method

Cause

Countermeasure

 

Remote controller transmission

 

 

 

error(E3)/signal receiving error(E5)

2 remote controllers are set as

Set a remote controller to main, and the

 

Abnormal if remote controller could not

“main.”

other to sub.

 

find blank of transmission path for 6 sec-

(In case of 2 remote con-

 

 

onds and could not transmit.

trollers)

Remote controller is connected with only one

 

(Error code: E3)

Remote controller is connected

 

Remote controller receives transmitted

with 2 indoor units or more.

indoor unit.

 

data at the same time, compares the

Repetition of refrigerant

The address changes to a separate setting.

 

data, and when detecting it, judges

address

~ Diagnose remote controller.

 

different data to be abnormal 30

Defective transmitting receiving

E3

continuous times. (Error code: E3)

a) When “RC OK” is displayed, remote con-

circuit of remote controller

or

 

trollers have no problem.

 

Defective transmitting receiving

Abnormal if indoor controller board could

Turn the power off, and on again to check.

E5

circuit of indoor controller board

 

not find blank of transmission path.

When becoming abnormal again, replace

 

(Error code: E5)

Noise has entered into trans-

indoor controller board.

 

Indoor controller board receives trans-

mission wire of remote control-

b) When “RC NG” is displayed, replace

 

mitted data at the same time, compares

ler.

remote controller.

 

the data,and when detecting it, judges

 

c) When “RC E3” or “ERC 00-66” is dis-

 

different data to be abnormal 30

 

played, noise may be causing abnormal-

 

continuous times. (Error code: E5)

 

ity.

 

 

 

 

 

Indoor/outdoor unit communication

Contact failure, short circuit or,

Check LED display on the outdoor control

 

error (Signal receiving error)

miswiring (converse wiring) of

circuit board. (Connect A-control service

 

Abnormal if indoor controller board

indoor/outdoor unit connecting

tool, PAC-SK52ST.)

 

cannot receive any signal normally for 6

wire

Refer to EA-EC item if LED displays EA-EC.

 

minutes after turning the power on.

Check disconnection or looseness of indoor/

 

Defective transmitting receiving

 

Abnormal if indoor controller board

outdoor unit connecting wire of indoor unit or

 

circuit of outdoor controller

 

cannot receive any signal normally for 3

outdoor unit.

 

circuit board.

 

minutes.

Check all the units in case of twin indoor

E6

Consider the unit as abnormal under

Defective transmitting receiving

unit system.

the following condition: When 2 or more

circuit of indoor controller board

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

 

indoor units are connected to an

Noise has entered into indoor/

If abnormality generates again, replace

 

outdoor unit, indoor controller board

outdoor unit connecting wire.

indoor controller board or outdoor

 

cannot receive a signal for 3 minutes

controller circuit board.

 

 

 

from outdoor controller circuit board, a

 

Other indoor controller board may have

 

signal which allows outdoor controller

 

defect in case of twin indoor unit system.

 

circuit board to transmit signals.

 

 

 

 

 

 

 

Indoor/outdoor unit communication

Defective transmitting receiving

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

 

error (Transmitting error)

circuit of indoor controller board.

If abnormality generates again, replace

 

Abnormal if indoor controller board

Noise has entered into power

indoor controller board.

E7

receives “1” 30 times continuously when

supply.

 

indoor controller board transmits “0” signal.

Noise has entered into outdoor

 

 

 

 

 

control wire.

 

 

 

 

 

 

Indoor controller board

Defective indoor controller

Replace indoor controller board.

 

Abnormal if data cannot be read normally

board

 

Fb

from the nonvolatile memory of the indoor

 

 

controller board.

 

 

 

 

 

 

 

Remote controller control board

Defective remote controller

Replace remote controller.

 

Abnormal if data cannot be read nor-

 

 

 

mally from the nonvolatile memory of the

 

 

 

remote controller control board.

 

 

 

(Error code: E1)

 

 

E1

Abnormal if the clock function of remote

 

 

or

 

 

controller cannot be operated normally.

 

 

E2

 

 

(Error code: E2)

 

 

 

 

 

 

 

 

 

19

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Mitsumi electronic PKA-A18HA4 Indoor/outdoor unit communication, Error Signal receiving error, Error Transmitting error

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