Error Code

Abnormal point and detection method

Case

Judgment and action

 

 

 

 

 

63H connector open

1 Disconnection or contact failure

1 Check connection of 63H connector on

 

Abnormal if 63H connector circuit is open

of 63H connector on outdoor

outdoor controller circuit board.

 

for 3 minutes continuously after power sup-

controller circuit board

Refer to 10-9.

F5

ply.

2 Disconnection or contact failure

2 Check the 63H side of connecting wire.

63H: High-pressure switch

of 63H

 

(5201)

 

3 63H is working due to defective

3 Check continuity by tester.

 

 

parts.

Replace the parts if the parts are defective.

 

 

4 Defective outdoor controller

4 Replace outdoor controller circuit board.

 

 

circuit board

 

 

 

 

 

 

2 connector open

1 Disconnection or contact failure

1 Check connection of connector(63H,63L) on

 

Abnormal if both 63H and 63L connector

of connector (63H,63L) on

outdoor controller circuit board.

 

circuits are open for 3 minutes continuous-

outdoor controller circuit board.

Refer to 10-9.

 

ly after power supply.

2 Disconnection or contact failure

2 Check the 63H and 63L side of connecting

F9

63H: High-pressure switch

of 63H, 63L

wire.

(4119)

3 63H and 63L are working due

3 Check continuity by tester.

 

63L: Low-pressure switch

to defective parts.

Replace the parts if the parts are defective.

 

<A42N only>

4 Defective outdoor controller

4 Replace outdoor controller circuit board.

 

board

 

 

 

 

 

 

Indoor/outdoor unit connector

1 Contact failure or miswiring of

1 Check disconnection or looseness or polarity

 

miswiring, excessive number of units

indoor/outdoor unit connecting

of indoor/outdoor unit connecting wire of

 

1. Outdoor controller circuit board can

wire

indoor and outdoor units.

 

automatically check the number of

2 Diameter or length of

 

 

connected indoor units. Abnormal if the

indoor/outdoor unit connecting

2 Check diameter and length of indoor/outdoor

 

number cannot be checked automatically

wire is out of specified capacity.

unit connecting wire.

 

due to miswiring of indoor/outdoor unit

3 4 or more indoor units are

Total wiring length: 80m[262ft]

 

connecting wire and etc. after power is

connected to 1 outdoor unit.

(including wiring connecting each indoor unit

 

turned on for 4 minutes.

4 Defective transmitting receiving

and between indoor and outdoor unit)

EA

2. Abnormal if outdoor controller circuit

circuit of outdoor controller

Also check if the connection order of flat

board recognizes excessive number of

circuit board

cable is S1, S2, S3.

(6844)

indoor units.

5 Defective transmitting receiving

 

 

3 Check the number of indoor units that are

 

 

circuit of indoor controller

 

 

board

connected to one outdoor unit. (If EA is

 

 

6 Defective indoor power board

detected)

 

 

7 2 or more outdoor units have

4~6 Turn the power off once, and on again to

 

 

refrigerant address “0” .

 

 

(In case of group control)

check.

 

 

8 Noise has entered into power

Replace outdoor controller circuit board,

 

 

supply or indoor / outdoor unit

indoor controller board or indoor power

 

 

connecting wire.

board if abnormality occurs again.

 

 

 

 

 

Miswiring of indoor/outdoor unit

1 Contact failure or miswiring of

7 Check if refrigerant addresses (SW1-3 to

 

connecting wire (converse wiring or

indoor/outdoor unit connecting

SW1-6 on outdoor controller circuit board)

 

disconnection)

wire

 

are overlapping in case of group control

 

Outdoor controller circuit board can

2 Diameter or length of

 

system.

 

automatically set the unit number of indoor

indoor/outdoor unit connecting

 

 

 

units.

wire is out of specified capacity.

8 Check transmission path, and remove the

 

Abnormal if the indoor unit number cannot

4 Defective transmitting receiving

 

be set within 4 minutes after power on

circuit of outdoor controller circuit

cause.

 

 

Eb

because of miswiring (converse wiring or

board

w The descriptions above, 1-8, are for EA, Eb

(6845)

disconnection) of indoor/outdoor unit con-

5 Defective transmitting receiving

 

necting wire.

circuit of indoor controller board

and EC.

 

 

 

 

6 Defective indoor power board

 

 

 

7 2 or more outdoor units have

 

 

 

refrigerant address “0” .

 

 

 

(In case of group control)

 

 

 

8 Noise has entered into power

 

 

 

supply or indoor/outdoor unit

 

 

 

connecting wire.

 

 

 

 

 

 

Start-up time over

1 Contact failure of indoor/

 

 

The unit cannot finish start-up process

outdoor unit connecting wire

 

 

within 4 minutes after power on.

2 Diameter or length of indoor/

 

 

 

outdoor unit connecting wire is

 

EC

 

out of specified capacity.

 

 

7 2 or more outdoor units have

 

(6846)

 

refrigerant address “0” .

 

 

 

(In case of group control)

 

 

 

8 Noise has entered into power

 

 

 

supply or indoor/outdoor unit

 

 

 

connecting wire.

 

 

 

 

 

36

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Mitsubishi Electronics PUY-A18NHA2-BS, PUZ-A30NHA2 Error Code, Case Judgment and action 63H connector open, Connector open

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