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MRQ23B4AST
Midea MRQ23B4AST Service Manual
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Service Manual_2018-
V1
.0
13
the
refrigerating
chamber
The side
light of
refrigerating
chamber
LED
12V/≤1
W
/
Switch
Switch of the
refrigerating
chamber
door
Pillar switch
M7G7-505,
VDE
，
CQC
/
Switch of t
he
freezing
chamber
Door
Sector-shap
ed
switch
2027
VDE
，
CQC
/
5.3 Inside temperature
T
emper
ature
tolerance ≤ 2
o
C
Compartment
The highest
Lowest
Freezing
-
14
o
C( 6.8
℉
)
-
22
o
C ( -7.6
℉
)
Refrigerating
7
o
C( 44.6
℉
)
1
o
C ( 33.8
℉
)
V
ariabl
e temperatur
e
/
/
5.4 Defrosting parts
Item
Initial
de
frosting peri
od
Normal defro
sting period
Defrosting
period
6hour
s
6-
48
hours
Defrosting s
ensor
NTC
NTC
Defrosting temperatur
e
controller
None
None
Thermal f
use
C
an’t be r
estore
d
77
℃
( 170.6
℉
)
Defrosting
heater in freezing
chamber
Steel pipe
Defrosting h
eater 1
15V/190
W
12
14
Table of Contents
Default Chapter
3
Table of Contents
3
1 Safety Warning Code
5
Warning for Operation Safety
5
Safety Instruction for Refrigerant
7
2 Description for Product Features
8
3 Installation and Commissioning
9
Handling
9
Door Disassembly and Assembly
9
Installation Location
9
Leveling of the Refrigerator
10
Door Reversal(None)
10
Installation of Handle
10
Installation of Door Lock
10
Adjustment to Level the Door
10
Adjustment to Shelves
10
4 Terms
11
Definition of Model(None)
11
Location of Nameplate(None)
11
5 Product Specification
12
Type Specification(None)
12
Electrical Parameters
12
Inside Temperature
13
Defrosting Parts
13
Circuit Diagram
14
6 Internal View and Dimension
15
Main Parts and Their Names
15
External Dimension
15
7 Refrigerating Piping System and Circulating Route of Cooling Air
16
Refrigerating Piping System
16
Circulating Route of Cooling Air
17
8 Dismantling of Parts
18
Parts on the Door
18
Parts Inside the Refrigerator
20
Light System
21
Air Duct and Fan Motor
22
Evaporator and Temperature Sensing System
24
Compressor Case
25
Display Control Board
27
Main Control Board
28
Bar Counter
30
Water Dispenser
30
Ice Maker
30
Water Filter
31
9 Function and Operation
32
Operation Panel
32
Display
32
Temperature Setting
32
Mode Setting
33
Super Freeze Mode
33
Fault Code and Solutions
34
Defrosting Function
35
Test Mode
36
10 Circuit Description
37
Sensor Resistance(R/T)
37
11 Troubleshooting Method
38
No Cooling(Air Cooling-Electronic)
38
No Working of Compressor
39
Inside Frosting, no Defrosting
39
Inside Frosting, no Defrosting-Maintenance Guidelines
40
Light Is Not on
41
Air Duct Not Operated(Electronically)
41
Fan Failure
42
Defective Defrost Circuit
42
Noise
43
12 Figures and Details of Repair Parts (Documents Are Provided in the Tsp)
44
13 Appendix
45
Refrigerator Maintenance Tooling and Equipment and Material
45
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Midea MRQ23B4AST Specifications
General
Brand
Midea
Model
MRQ23B4AST
Category
Refrigerator
Language
English
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