15

(2) Timing in self-check

Trouble of Defrost heater

: Self-check is conducted after defrosting.

 

(Make sure to confirm the display before unplugging the power cord

 

because it is automatically reset once the power cord is pulled out.)

Trouble of Ice maker

: Press the

switch on the panel for 5 seconds. (Ice making test mode.)

 

The setting of ice making compartment blinks on LCD during the test operation.

Trouble of Fan motor

: Open the door and then closed it.

 

When abnormality is found in fan motor, buzzer sound is heard every time the door

 

is closed.

 

Trouble of Inverter

: Check the error when compressor starts up or is operating.

Trouble of Thermistor

: Self-check is continuously working

(3) Error display and trouble locating

1. Display details

After conducting the self-check by referring to 6-2(1), error codes are displayed in the tempera- ture display section. ”e” and two digit error code flashes alternately as shown in the right figure. When several errors occur, they are displayed alternately. However, the error whose code has a smaller number has priority to be displayed first.

(Ex.) In case the errors of ice tray thermistor (e10), refrigerator thermistor (e13) and refrigerator fan motor (e31) are happening simultaneously;

TEMP

TEMP

e 10 13 31 e 10 13 31 ·····

For 2 minutes in self-check, a high-tone sound is heard due to the operation check of damper.

2. Check point and treatment

(Ex.) When ice maker gear

 

box is defective.

Display

Testing

Self-check

LCD

Error code

Trouble

Detecting method

 

Check point

Treatment

Control

(*3)

 

 

 

 

 

 

 

 

 

 

(*1)

 

Ice maker is under testing

 

 

 

 

 

 

 

 

 

 

 

 

 

(*5)

When the following communi-

1.

Connector CN8K, CN7S on control board

Repair the

Keep the same operation as

 

 

 

Communication

cation errors occur

 

4-pin relay connector (hinge)

contact failure.

the one before the communi-

 

 

 

error of

between control board and

 

4-pin connector on operation P.C. board

 

cation error has occurred.

 

 

 

operation P.C. board:

 

 

 

 

 

operation panel

 

 

 

 

e

 

01

•They transmit and receive

 

 

 

 

 

 

data that has nothing to do

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with settings.

2.

Trouble of control board and operation

Replace

 

 

 

 

 

•They cannot transmit and

 

P.C. board

 

 

 

 

 

 

receive data each other

 

 

 

 

 

 

 

 

for about two seconds.

 

 

 

 

 

 

 

Communication

When abnormality is found in

 

 

Replace the

Compressor OFF.

 

 

 

error of inverter

the communication between

 

 

control

 

e

 

02

 

refrigerator control circuit and

 

 

board.

 

 

 

inverter control circuit in con-

 

 

 

 

 

 

 

 

 

 

 

 

 

trol board. (When they do not

 

 

 

 

 

 

 

 

transmit and receive data for

 

 

 

 

 

 

 

 

10 seconds.)

 

 

 

 

 

 

 

Trouble of

When the model of con-

1.

Check the model name of control board

Replace

Keep operating the unit, and

e

 

03

model judge-

trol board is different from

 

 

 

conduct error code indication

 

 

 

ment

the one of operation P.C.

2.

Check the operation p.c. board.

Replace

only.

 

 

 

 

board.

 

 

 

 

 

 

 

 

 

 

 

 

Trouble of ice

When there is a short or

1.

Connector CN7S on control board, Ice gear

Repair the

When the compartment door

 

 

 

making tray

open circuit in the ice

 

box 6-pin relay connector, 8-pin relay

contact failure.

has been closed for 3 hours

e

 

10

thermistor

making tray thermistor.

 

connector

 

and when freezer compartment

 

 

 

 

 

2.

Check the resistance of thermistor.

Replace

thermistor is -10:or less, ice-

 

 

 

 

 

detecting operation starts.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Trouble of

When there is a short or

1.

Connector CN7S on control board. 6-pin

Repair the

After 10 minutes off, the

e

 

11

freezer com-

open circuit in the freezer

 

relay connector

contact failure.

compressor repeats 30-

 

 

 

partment

compartment thermistor.

 

 

 

minute ON and 20-minute

 

 

 

thermistor

 

2. Check the resistance of thermistor.

Replace

OFF.

 

 

 

Trouble of

When there is a short or

1.

Connector CN7S on control board. 2-pin

Repair the

The defrost heater won’t be

e

 

12

defrost

open circuit in the defrost

 

relay connector

contact failure.

turned ON.

 

thermistor

thermistor.

 

 

 

 

 

 

 

2.

Check the resistance of thermistor.

Replace

 

 

 

 

 

 

 

 

 

 

Trouble of

When there is a short or

1.

Connector CN7S on control board, 4-pin

Repair the

Synchronize the open/close

e

 

13

refrigerator

open circuit in the refrig-

 

relay connector

contact failure.

status of R damper with that

 

 

 

thermistor

erator compartment ther-

 

 

 

of C damper.

 

 

 

 

mistor.

2.

Check the resistance of thermistor.

Replace

 

 

 

 

Trouble of

When there is a short or

1.

Connector CN7S, on control board, 6-pin

Repair the

Synchronize the open/close

e

 

14

chilled compart-

open circuit in the chilled

 

relay connector

contact failure.

status of C damper with that

 

 

 

ment thermistor

compartment thermistor.

 

 

Replace

of R damper.

 

 

 

 

 

2.

Check the resistance of thermistor.

 

 

 

 

Trouble of

When there is a short or

1. Connector CN7S on control board, 6-pin

Repair the

•When S-compartment is

 

 

 

versa compart-

open circuit in the versa

 

relay connector

contact failure.

used as “freezer”: S-damper

 

 

 

ment thermis-

compartment thermistor.

 

 

 

is open when compressor is

 

 

 

tor

 

 

 

 

turned on, S-damper is

 

 

 

 

 

 

 

closed when compressor is

 

 

 

 

 

 

 

 

e

 

15

 

 

2. Check the resistance of thermistor.

Replace

turned off.

 

 

 

•When S-compartment is

 

 

 

 

 

 

 

 

used other than “freezer”: S-

 

 

 

 

 

 

 

 

damper remains open for

 

 

 

 

 

 

 

 

the first 3 minutes and then

 

 

 

 

 

 

 

 

closed for the rest of time.

 

 

 

 

 

 

 

 

S-compartment:

 

 

 

 

 

 

 

 

Versa(select) compartment.

 

 

 

Trouble of veg-

When there is a short or

1.

Connector CN7S on control board, 4-pin

Repair the

When R-damper is open,

e

 

16

etable compart-

open circuit in the veg-

 

relay connector

contact failure.

V-heater is turned on.

 

 

 

ment thermistor

etable compartment ther-

 

 

 

When R-damper is closed,

 

 

 

 

mistor .

2.

Check the resistance of thermistor.

Replace

V-heater is turned off.

 

 

 

 

 

 

 

 

 

Page 15
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Mitsubishi Electronics MR-G50J-SS-NZ Timing in self-check, Error display and trouble locating, Check point and treatment