Midea HD-676REWN, Service Manual

Page: 3 / 57

Service Manual_2020-V3.0
3
Contents
1. SIGNIFICANT UPDATE NOTES (NONE)
........................................................................................................ 5
2. SAFETY WARNING ............................................................................................................................................... 6
2.1 W
ARNING FOR OPERATION SAFETY
........................................................................................................................... 6
2.2 S
AFETY INSTRUCTION FOR REFRIGERANT
................................................................................................................. 8
3. INSTALLATION AND COMMISSIONING ............................................................................................................ 9
3.1 H
ANDLING
................................................................................................................................................................... 9
3.2 D
OOR
D
ISASSEMBLY AND
A
SSEMBLY
........................................................................................................................ 9
3.3 I
NSTALLATION LOCATION
............................................................................................................................................ 9
3.4 L
EVELING OF THE REFRIGERATOR
........................................................................................................................... 10
3.5 L
EFT OR RIGHT OPEN DOOR REVERSAL
................................................................................................................... 10
3.6 I
NSTALLATION OF HANDLE
（
N
ONE
）
...................................................................................................................... 11
3.7 I
NSTALLATION OF DOOR LOCK
（
N
ONE
）
................................................................................................................ 11
4. MAIN PARTS AND EXTERNAL DIMENSION
.................................................................................................... 12
4.1 M
AIN PARTS
.............................................................................................................................................................. 12
4.2 E
XTERNAL DIMENSION
............................................................................................................................................. 13
4.3 M
IDEA PRODUCT SERIAL NUMBER AND LOCATION
................................................................................................... 14
5. ELECTRIC CONTROL SYSTEM ......................................................................................................................... 15
5.1 E
LECTRICAL PARTS PARAMETERS
............................................................................................................................ 15
5.2 C
IRCUIT DIAGRAM
.................................................................................................................................................... 17
5.3 M
AIN
PCB
TERMINAL CONNECTION DIAGRAM
......................................................................................................... 18
6. REFRIGERATION SYSTEM
................................................................................................................................ 19
6.1 R
EFRIGERATION SYSTEM WORKING PRINCIPLE
....................................................................................................... 19
6.2 C
OOLING PIPELINE AND DRAIN PIPE INSIDE THE CABINET
........................................................................................ 19
6.3 C
IRCULATING ROUTE OF COOLING AIR
..................................................................................................................... 20
6.4 W
ELDING POINTS IN CHAMBERS OR FOAM LAYER
.................................................................................................... 20
6.5 W
ELDING POINT IN THE COMPRESSOR CASE
........................................................................................................... 21
7. DISMANTLING OF PARTS .................................................................................................................................. 22
7.1 P
ARTS ON THE DOOR
................................................................................................................................................ 22
7.2 P
ARTS INSIDE THE REFRIGERATOR
.......................................................................................................................... 22
7.3 L
IGHT SYSTEM
.......................................................................................................................................................... 23
7.4 A
IR DUCT COMPONENTS REFRIGERATING CHAMBER AND FAN MOTOR
.................................................................... 26
7.5 A
IR DUCT COMPONENTS IN FREEZING CHAMBER AND FAN MOTOR
.......................................................................... 27
7.6 E
VAPORATOR AND
D
EFROST SYSTEM
...................................................................................................................... 29
7.7 C
OMPRESSOR CASE
................................................................................................................................................ 30
7.8 D
ISPLAY CONTROL BOARD
....................................................................................................................................... 35
7.9 M
AIN CONTROL BOARD
............................................................................................................................................ 36
8. TEMPERATURE SENSING SYSTEM ................................................................................................................. 38