Mitsubishi Electric MR-B46Z-W-C Service Manual page 32

Excessive cooling
Is supercool chilling set?
No
Only food around the air
outlet gets frozen.
No
Does the motor damper baf-
fle, for the chilled and the ice
making compartment, in the fan
grille open and close?
(Wait 1 minute for self-check).
(See "Self check method and
its operation, Ice making
test operation" on page 23.)
Normal
Does the motor damper have a sign of frost?
Not frosted
Check the chilled thermistor.
Dip the chilled thermistor into ice water (0ºC), and discon-
nect the 6-pin connector in the connector cover in the
bottom of the refrigerator control panel, and measure the
resistance between the (white) and
• Resistance at 0 : Approx. 6~7 k
CN5D
26 26
24 24
22 22
20 20
CN9S
29 29
OAH162
Yes
Set supercool chilling to
"Low".
Yes
Keep the food away from
air outlet.
The baffle
does not
Is connector CN5D on
operate
the control board con-
nected properly?
Yes
Disconnect CN5D and measure
the resistances between
20
and between and .
24 26
Check that the winding of the
motor damper for chilled and ice
making compartment has a resist-
ance of approx. 415 .
Frosted
(white) terminals.
6-pin connector
6-pin connector
Is supercool chilling set to
"Low"?
No
Open the refrigerator com-
partment door and attach a
magnet on the door switch to
check that cold air blows from
the outlet. (See 1.)
Yes
No
Connect the connector
properly.
0
Is the 6-pin connector which is in the connector
or
and ,
cover in the back of ice making compartment
22
connected properly?
(The 6-pin connector is connected to the motor
damper. Refer to the figure below.)
Normal Replace the motor damper for chilled and ice mak-
ing compartment.
Repair the frosted part.
Failure in the thermistor
Motor damper
for chilled and ice making
compartment
M
Chilled
thermistor
If the food is cooled excessively,
adjust the temperature setting for
lower case (when supercool chilling
is set).
32
Poor cooling
Yes
Release the supercool
chilling setting.
No
Proceed to [6] on page 36.
No
Yes
Note: Replace the fan grille as the motor
damper for chilled and ice making
compartment is integrated in it.
Replace the chilled thermistor.
Note: Replace the control panel assem-
bly as the chilled thermistor is inte-
grated in it.
Refrigerator
compartment
Attach a
magnet bar
here.
1
Ice
Versa
making
compart-
compart-
ment
ment
Page 9.
The set temperature can be adjusted
on the operation panel. Page 20.