Mitsubishi Heavy Industries FDC224KXZME1 Service Manual Download

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116

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'18 • KX-SM-292

Error code

Remote control:

7-segment display:

LED

Green

Red

Indoor

Outdoor

Content

E63

Emergency stop

Keeps flashing Stays Off
Keeps flashing 1 time flash

1. Applicable model

5. Troubleshooting

Indoor unit

Diagnosis

Countermeasure

Is the

remote control setting

of Emergency Stop

"Valid"?

Is ON

signal inputted to the

CnT terminal of indoor

unit control PCB?

Save data for 30 minutes before stopping in Mente PC

YES

Check and save the data of

operating conditions.

Check the conditions

whether it occurs

immediately after the power

on or during operation.

Replace remote control

PCB.

Replace indoor unit control

PCB.

Check the cause of

emergency stop.

(It is better to have the data

for 30 minutes before

stopping, when instructing

the installer.)

2. Error detection method

When ON signal is inputted

to the CnT terminal of indoor

unit control PCB

3. Condition of error displayed

Same as above

4. Presumable cause

Factors for emergency stop

Note:

Indoor unit detected emergency stop signal gives command "all stop"

YES

2.4 Outdoor unit control PCB replacement procedure

(Note) If cut the tie, the wiring cables should be bound with new tie again.

●

Exchange the control PCB according to the following procedure.

①

Replace the control PCB after elapsing 3 minutes from power OFF.

(Be sure to measure voltage (DC) at both capacitor terminals (1. Power source for PCB 2. Power source for fan motor)
and check that the voltage is discharged completely. (Refer to Fig.1))

②

Disconnect the connectors from the PCB.

③

Disconnect the blue wiring passing through CT1 on the PCB before replace the coutrol PCB.

④

Set the setting switches (SW1-6) and jumper wires (J11-16) of new PCB same as previous PCB.

⑤

Tighten up a screw after passing blue wiring through CT1 of the changed.

⑥

Connect the connectors to the PCB. (Contirm the connectors are not half inserted.)

After elapsing 3 minutes

from power OFF

CNQ3 2

CT1

LED2

(Green)

CNN2

CNTH

CNEEV1

CNN9

CNI

only FDC335KXZME1

CNL1

CNFAN_2

CNR1

CNB2

CNEEV2

CNQ1

CNFAN_1

CNN6

CNW

SW3-6

CNM1

CNN1

SW1,2

J11-16

Parts arrangement view

1 Reuse the parts used before the PCB exchange.
2 Please do not carry out wrong insertion.

The PCB will be destroyed if a mistake is made
in putting CNA2 (brown) and CNQ3 (yellow).

CNA2

CNQ3

LED3

(Green)

LED1

(Red)

CNA2 2

CN 2

CNS1
CNS2
CNG1
CNG2

CNX1

CNU1

CNF2

CNF1

CNP1

Precautions for Safety

●

Since the following precaution is the important contents for safety, be sure to observe them.

WARNING and CAUTION are described as follows:

Indicates an imminently hazardous situation which will result in death or serious injury if
proper safety procedures and instructions are not adhered to.
Indicates a potentially hazardous situation which may result in minor or moderate injury
if proper safety procedures and instructions are not adhered to.

WARNING

●

Securely replace PCB according to this following instruction.
If PCB is incorrectly replace, it will cause an electric shock or fire.

●

Be sure to check that the power source for the outdoor unit is turned OFF before replace PCB,
The PCB replacement under current-carrying will cause an electric shock.

●

After finishing PCB replacement, check that wiring is correctly connected with the PCB before power
distribution, If PCB is incorrectly replace, it will cause an electric shock or fire.

CAUTION

●

Bundle the wiring so as not to tense because it will cause an electric shock.

WARNING

CAUTION

PCB012D017G

134