Mitsubishi Electronics 6 TROUBLE SHOOTING

6.1 TROUBLE CRITERION OF MAIN PARTS
MR-385R-A MR-420R-A MR-455R-A
MR-385R-A(NZ) MR-420R-A(NZ) MR-455R-A(NZ)
Compressor
Measure the resistance with a tester.
(Ambient temperature:Room temperature 15oC ~ 25oC)
In the control
panel of the
Measure the resistance with a tester. refrigerator
compartment
Model
Measure the resistance with a tester.(Ambient temperature:Room temperature 15oC ~ 25oC)
PTC RELAY
PTH7M330MD2
Measure the resistance with a tester.
(Ambient temperature:Room temperature 15oC ~ 25oC)
Normal abnormal(faulty)
As PTC Relay has been heated while refrigerator is running be sure
to measure the resistance after the thermistor has got cool enough.
6 TROUBLE SHOOTING
69 + 9o C
120 + 5o C
400VAC
Run capacitor
Opened (∞Ω )
W
Rated input
Compressor in
Opened (∞Ω )
69 + 9o C
Motor
protector
120 + 5o C
- 14 -
33 Ω (Approx.)
Connected
Point
Model
Normal abnormal(faulty)
Less than 1Ω
Opened(∞Ω ) or Short (0Ω)
rear side of
the frame
Starting current
Running current A
chamber at the
Compressor in
the machine
chamber at the
rear side of
the machine
the machine
chamber at the
Components/
Part Name
Model
Parts Mounted
Position
Check Method and Criterion
DG57C96RAW5
MR-420R,455RMR-385R
DG66C11RAW5
the frame
Compressor in
rear side of
the frame
Abnormal
(faulty)
Close
Open
Normal
Main wiring
Auxilliary wiring 17.7 Ω (Approx.)
5TM181NHBYY 5TM205NHBYY
abnormal(faulty)
A
Opened(∞ Ω )
RU
Short (0Ω)
7.38/8.01(220/240V 50Hz)
0.57/0.55(220/240V 50Hz)
Normal
MR-385R MR-420R,455R
18.2 Ω (Approx.)
17.7 Ω (Approx.)
15.4 Ω (Approx.)
117/118(220/240V 50Hz)
8.05/8.83(220/240V 50Hz)
0.71/0.66(220/240V 50Hz)
106/108(220/240V 50Hz)
Short (0Ω )
MR-420R,455RMR-385R
Rated input
Auxilialy
wiring
Main
wiring
5
6
3
2
5
6
2
3