Master-Bilt MBR49-SH, MBGR70H User Manual
BOTTOM MOUNT REFRIGERATORS, FREEZERS & MERCHANDISERS
Installation, Operation and Maintenance Technical Instructions
FREEZERS: F23-S, F23-SH
F49-S, F49-SH
F72-S, F72-SH
REFRIGERATORS: R23-S, R23-SH, R23-G
R49-S, R49-SH, R49-G
R72-S, R72-SH, R72-G
MERCHANDISERS: GR26H, GR48S, GR72H
- 1 – 07/15 Rev. H 146526
A. GENERAL
1. SPECIFICATION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A3
1) GENERAL
2) MAIN COMPONENTS
2. REFRIGERATION CYCLE - - - - - - - - - - - - - - - - - - - - - - - - - - A9
3. TROUBLE SHOOTING - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A11
1) CHECKING THE POWER SUPPLY
2) CHECKING THE POWER SUPPLY OF CONT ROL BOARD
3) CHECKING THE CONTROL PART OF REFRIGERATION CYCLE
4) CHECKING THE DEFROST PART
5) WHEN THE UNIT DOES NOT COOL
6) WHEN THERE IS A ABNORMAL NOISE
7) WHEN THE TEMPERATURE DOES NOT DISPLAY
8) WHEN THE LAMP DOES NOT LIGHT
9) CHECKING SENSOR
4. FEATURE CHART - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A22
5. WIRING DIAGRAM - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - A28
6. REPLACEMENT OF COMPONENTS - - - - - - - - - - - - - - - - - - A37
- 2 – 07/15 Rev. H 146526
1. SPECIFICATION
(27.4”)
(55.2”)
(78.0”)
(27.4”)
(55.2”)
(78.0”)
(23.6”)
(51.4”)
(74.2”)
(23.6”)
(51.4”)
(74.2”)
1.1 GENERAL - SOLID DOOR FREEZER & REFRIGERATOR (FULL DOOR / HALF DOOR)
PRODUCT
MODEL
Capacity
Net Capacity
Exterior Dimension
(Including casters
Door Handles)
Interior Dimension
Product Weight
(W)
(D)
(H)
(W)
(D)
(H)
SOLID (FULL/HALF) DOOR
F23-S /
F23-SH
650ℓ(23ft3)/
648ℓ(22.9ft3)
552ℓ(19.5ft3)/
551ℓ(19.4ft3)
695㎜
600㎜
124㎏(273 lb)/
126㎏(278 lb)
FREEZER
F49-S /
F49-SH
1,385ℓ(49ft3)/
1,381ℓ(48.8ft3)
1,195ℓ
(42.2 ft3)/
1,191ℓ(42.1 ft3)
1,400㎜
1,305㎜
194㎏(428 lb)/
198㎏(437 lb)
F72-S /
F72-SH
2,035ℓ(72ft3)/
2,028ℓ(71.6ft3)
1,790ℓ
(63.2ft3)/
1,782ℓ(63ft3)
1,980㎜
838 ㎜ (33”)
2,127 ㎜ (83.7”)
1,885㎜
635 ㎜ (25”)
1,545 ㎜ (60.8”)
255㎏(562 lb)/
260㎏(573 lb)
SOLID (FULL/HALF) DOOR
R23-S /
R23-SH
650ℓ(23ft3)/
648ℓ(22.9ft3)
552ℓ
(19.5ft3)/
551ℓ(19.4ft3)
695㎜
600㎜
121㎏(267 lb)/
123㎏(271 lb)
REFRIGERATOR
R49-S /
R49-SH
1,385ℓ(49ft3)/
1,381ℓ(48.8ft3)
1,195ℓ
(42.2 ft3)/
1,191ℓ(42.1 ft3)
1,400㎜
1,305㎜
186㎏(410 lb)/
190㎏(419 lb)
R72-S /
R72-SH
2,035ℓ(72ft3)/
2,028ℓ(71.6ft3)
1,790ℓ
(63.2ft3)/
1,782ℓ(63ft3)
1,980㎜
1,885㎜
253㎏(558 lb)/
258㎏(569 lb)
Door Type
Swing 1EA/
Swing 2EA
Swing 2EA/
Swing 4EA
Swing 3EA/
Swing 6EA
Swing 1EA/
Swing 2EA
Swing 2EA/
Swing 4EA
Door Material Stainless steel (STS)
Shelves 4EA 8EA 12EA 4EA 8EA 12EA
AC 115V
Power Voltage AC 115V/60Hz
Plug in - Installation NEMA 5-15P NEMA 14-20P
/208-230V
60Hz
AC 115V/60Hz
NEMA 5-15P
Amps 8.5A 9.5A 9.0A 7.5A 7.5A 10.0A
Compressor 3/5HP 3/4HP 9/8HP 3/8HP 3/8HP 1/2HP
R-404A R-134a
Refrigerant
Range of Temperature
Door auto-close equipment
340 g
(12.0 oz)
630 g
(22.2 oz)
670 g
(23.6 oz)
210 g
(7.5 oz)
270 g
(9.5 oz)
Below -18℃ (0°F) 0℃ ~ 4℃ (+32°F ~ +40°F)
Auto-close for Spring
Door stop 120˚ Stop
Swing 3EA/
Swing 6EA
400 g
(14.0 oz)
Air suction equipment Air damper
Caster 4” × 4EA 4” × 6EA 4” × 4EA 4” × 6EA
Condensing unit Sliding Type
◈ Above specifications a r e subj ected to change without prior not ice for quality improvement.
◈ The nameplate(includ es Serial Number) is located on t he upper left of the cabinet interior.
- 3 – 07/15 Rev. H 146526
(23 ft3)
(49 ft3)
(72 ft3)
(19.5 ft3)
(42.2 ft3)
(63.2 ft3)
(27.4”)
(55.2”)
(78.0”)
(23.6”)
(51.4”)
(74.2”)
(278 lb)
(441 lb)
(597 lb)
1.2 GENERAL - GLASS DOOR REFRIGERATOR
PRODUCT
MODEL R23-G R49-G R72-G
Capacity
Net Capacity
Exterior Dimension
(Including casters
Door Handles)
Interior Dimension
Product Weight
Door Type Swing 1EA Swing 2EA Swing 3EA
(W)
(D)
(H)
(W)
(D)
(H)
GLASS (FULL) DOOR REFRIGERATOR
650 ℓ
552 ℓ
695㎜
600㎜
126㎏
1,385 ℓ
1,195 ℓ
1,400㎜
835 ㎜ (32.9”)
2,127 ㎜ (83.7”)
1,305㎜
635 ㎜ (25”)
1,545 ㎜ (60.8”)
200㎏
2,035 ℓ
1,790 ℓ
1,980㎜
1,885㎜
271㎏
Door Material Stainless steel (STS)
Shelves 4EA 8EA 12EA
Power Voltage AC 115V/60Hz
Plug in - Installation NEMA 5-15P
Amps 5.0A 7.5A 8.0A
Compressor 3/8HP 3/5HP 3/5HP
R-134a R-404A
Refrigerant
Range of Temperature
Door auto-close equipm ent Auto-close for Spring
Door stop 120˚ Stop
Air suction equipment Air damper
Caster 4” × 4EA 4” × 6EA
Condensing unit Sliding Type
220 g
(7.8 oz)
320 g
(11.3 oz)
0℃ ~ 4℃ (+32°F ~ +40°F)
640 g
(22.6 oz)
◈ Above specifications a r e subj ected to change without prior not ice for quality improvement.
◈ The nameplate(includ es Serial Number) is located on t he upper left of the cabinet interior.
- 4 – 07/15 Rev. H 146526
2.1 MAIN COMPONENTS - SOLID DOOR FREEZER & REFRIGERATOR
France)
France)
CAJ4461Y(A)
France)
Type of Compressor
motor
189~227㎌
/ 165V
315㎌ /
160V
Evaporator pipe
Diameter
12.7mm
(1/2”)
12.7mm
(1/2”)
Condenser pipe
Diameter
Interior Temp.
Indication
PRODUCT
MODEL
Compressor
(Manufacture)
Compressor
Capacity(kcal/h)
SOLID (FULL/HALF) DOOR
FREEZER
F23-S /
F23-SH
NEK2150GK
(Embraco)
F49-S /
F49-SH
CAJ2432Z(A)
(Tecumseh-
F72-S /
F72-SH
CAJ2446Z(H)
(Tecumseh-
LBP 628 LBP 808 LBP 1219 LBP 303 HBP 1586
SOLID (FULL/HALF) DOOR
REFRIGERATOR
R23-S /
R23-SH
R49-S /
R49-SH
SK1A1C-L2W
(Samsung-Korea)
R72-S /
R72-SH
(Tecumseh-
CSR CSIR
Compressor O.L.P T0873/G9 GA3PJU00 MST00AHN 4TM795TFBZZ-53 GA3SJU81
Compressor Relay
Starting Capacitor
Running Capacitor
RVA9AD3C-
121
25 ㎌ / 400V 30 ㎌ / 400V 15㎌ / 160V 12㎌ / 250V
3ARR3*5R* 3ARR3*3A* J531Q34E220M350-3 3ARR18A100B
88 ㎌ / 160V 125 ㎌ / 125V 250 ㎌ / 160V
-
Type of Evaporator Cu pipe + Al fin + Blue color coating
9.52mm (3/8")
9.52mm (3/8")
Cooling Fan Motor IS3225LTSA, 120V/60Hz
Type of Condenser Cu pipe + Al fin
9.52mm (3/8")
Condenser Fan Motor MA7425W1, 120V/60Hz
Dryer OD 25.4mm (1"), XH-9, 30g(1.06oz)
Temperature Control Thermistor
Running Indication Digital Display
Digital Display
Interior Lamp
(Incandescent lamp)
40W × 1EA 40W × 2EA 40W × 1EA 40W × 2EA
Defrost for evaporator Heated defrost (Control of thermistor) Off cycle
Defrost sheath heater 450W 670W 944W -
Defrost pan heater 60W 90W 128W -
Drain heater 9W -
Door switch SP201R-7DR, AC125V
Power switch SL112A, AC125V/12A
- 5 – 07/15 Rev. H 146526
Type of Compressor
motor
2.2 MAIN COMPONENTS - GLASS DOOR REFRIGERATOR
PRODUCT
MODEL R23-G R49-G R72-G
Compressor
(Manufacture)
Compressor Capacity(kcal/h)
Compressor O.L.P 4TM795TFBZZ-53 T0873/G9
Compressor Relay J531Q34E220M350-3 RVA9AD3C-121
Starting Capacitor
Running Capacitor
Type of Evaporator Cu pipe + Al fin + Blue color coating
Evaporator pipe Diameter 9.52mm (3/8") 12.7mm (1/2”)
Cooling Fan Motor IS3225LTSA, 120V/60Hz
(Samsung-Korea)
GLASS (FULL) DOOR REFRIGERATOR
SK1A1C-L2W
LBP 303 LBP 628
CSR
125 ㎌ / 125V 189~227 ㎌ / 165V
12 ㎌ / 250V 25 ㎌ / 400V
NEK2150GK
(Embraco)
Type of Condenser Cu pipe + Al fin
Condenser pipe Diameter 9.52mm (3/8")
Condenser Fan Motor MA7425W1, 120V/60Hz
Dryer OD 25.4mm (1"), XH-9, 30g(1.06oz)
Temperature Control Thermistor
Running Indication Digital Display
Interior Temp. Indication Digital Display
Interior Lamp (LED) 6W x 1EA 6W x 2EA 6W x 3EA
Defrost for evaporator Off cycle
Defrost sheath heater -
Defrost pan heater -
Drain heater -
Door switch SP201R-7DR, AC125V
Power switch SL112A, AC125V/12A
Light switch RL1-3, 16A/250V, ON-OFF
- 6 – 07/15 Rev. H 146526
3.1 GENERAL - MERCHANDISERS
PRODUCT
MODEL GR26H GR48S GR70H
Capacity
Net Capacity
Exterior Dimension
(Including casters
Door Handles)
Interior Dimension
Net Weight
Door Type Swing 1EA Sliding 2EA Swing 3EA
Door Material Glass + PVC Glass + PVC Glass + Al
Shelves 4EA 8EA 12EA
(W)
(D)
(H)
(W)
(D)
(H)
MERCHANDISERS
736 ℓ (26 ft
677 ℓ (23.9 ft
3
) 1359 ℓ (48 ft3) 1982 ℓ (70 ft3)
3
) 1339 ℓ (47.3 ft3) 1877 ℓ (66.3 ft3)
720㎜ (28.4”) 1,350 ㎜ (53.2”) 1,980 ㎜ (78”)
844㎜ (33.3”) 780 ㎜ (30.7”) 835 ㎜ (32.9”)
2,017㎜ (79.4”) 2,012 ㎜ (79.2”) 2,126 ㎜ (83.7”)
640㎜ (25”) 1,280 ㎜ (50.4”) 1,885 ㎜ (74.2”)
719㎜ (28.3”) 642 ㎜ (25.3”) 635 ㎜ (25”)
1,584㎜ (62.4”) 1,562 ㎜ (61.5”) 1,545 ㎜ (60.8”)
130㎏ (287 lb) 215㎏ (474 lb) 325㎏ (716 lb)
Power Voltage AC 115V/60Hz
Plug in - Installation NEMA 5-15P
Amps 3.9A 10.0A 11.9A
Compressor 1/4 HP 1/2 HP 1/2 HP
R-134a R-134a R-134a
Refrigerant
300g (10.6 oz) 460g (16.2 oz) 500g (17.6 oz)
Range of Temperature
0℃ ~ 4℃ (32℉ ~ 40℉)
Door auto-close equipm ent Auto-close for Spring Auto-close for slope Auto-close for Spring
Door stop equipment 120˚ Stop - 120˚ Stop
Air suction equipment - - Air damper
Caster Adjust foot 4EA Adjust foot 6EA Adjust foot 6EA
Condensing unit Sliding Type
Door switch - - -
Power(or Lamp) switch SL112A, AC125V/12A
◈ Above specifications a r e subj ec t ed t o change without prior notice for quality improvement.
◈ The nameplate(includ es Serial Number) is located on t he upper left of the cabinet interior.
- 7 – 07/15 Rev. H 146526
4.1 MAIN COMPONENTS - MERCHANDISERS
PRODUCT
MODEL GR26H GR48S GR70H
Compressor
(Manufacture)
Compressor Capacity(kcal/h) LBP 256 HBP 1946 HBP 1946
Type of Compressor motor RSCR CSIR CSIR
Compressor O.L.P 4TM444NHBYY CRA38014 CRA38014
Compressor Relay J531Q32E4R7M1802 3ARR3*2M* 3ARR3*2M*
Starting Capacitor -
Running Capacitor
Type of Evaporator Cu pipe + Al fin
Evaporator pipe Diameter 9.52 mm (3/8") 12.7mm (1/2”)
Cooling Fan Motor IS3225LTSA, 120V/60Hz
Type of Condenser Cu pipe + Al fin
SK182C-L2U
(SAMSUNG)
12 ㎌/250V
MERCHANDISERS
CAJ4476Y(A)
(Tecumseh-France)
250 ㎌/160V 250 ㎌/160V
- -
CAJ4476Y(A)
(Tecumseh-France)
Condenser pipe Diameter 9.52 mm (3/8")
Condenser Fan Motor MA7425W1, 120V/60Hz
Dryer OD 25.4mm (1"), XH-9, 30g(1.06oz)
Temperature Control
Running Indication -
Interior Temp. Indication -
Interior Lamp
(Fluorescent lamp)
Ad. Panel Fluorescent Lamp 20W × 1EA 32W × 1EA 32W × 2EA
Ballast 32W(Double)×1EA 32W(Double)×1EA 32W(Double)×2EA
Ballast Name
(Manufacture)
Defrost for evaporator Off cycle
Defrost sheath heater - - -
Defrost pan heater - - -
Thermostat
(GNF-250L)
32W × 1EA 32W × 1EA 32W × 2EA
B232I120RH-A
(ADVANCE)
Thermostat
(GNF-240L)
B232I120RH-A
(ADVANCE)
Thermostat
(GNF-246L)
B232I120RH-A
(ADVANCE)
Drain heater - - -
- 8 – 07/15 Rev. H 146526
2. REFRIGERATION CYCLE
CONDENSER
EVAPORATOR
CAPILLARY TUBE
COMPRESSOR
Mechanical refrigeration is accomplished by continuously circulating, evaporating, and condensing a fixed
supply of refrigerant in a closed system. Evaporation occurs at allow temperature and pressure while
condensation occurs at high temperature and pressure. Thus it is possible to transfer heat fom an area of
low temperature (i.e., refrigerated compartment) to an area of high temperature (i.e., surrounding of
refrigerator).
THE BASE REFRIGERATION CYCLE
Beginning the cycle at the evaporator inlet the low pressure liquid expands, absorbs heat (so refrigerator
inner-cabinet is cooled), and evaporates, changing to allow low pressure gas at the evaporator outlet.
The compressor pumps this gas from the evaporator, increases its pressure, and discharges the high
pressured- temperature gas to the condenser.
The condenser lets high pressured- temperature gas emit the heat (so surrounding of the condenser is
warmed) in order to make it condense.
The capillary tube prevents high pressured- temperature liquid from entering the evaporator in order to
lower the pressure in the evaporator and control the flow of refrigerant into the evaporator automatically.
Eventually the desired air temperature in refrigerator inner-cabinet is reached, the thermostat (temperature
controller) will break the electrical circuit to the compressor motor and stop the compressor.
- 9 – 07/15 Rev. H 146526
As the temperature of the air rises, the thermostat (or controller) remakes the electrical circuit. The
compressor starts, and cycle continues.
The schematic refrigeration (or freezing) cycle of F23/F49/F72/R23/R49/R72/GR26/GR48/GR70 is like
below.
MODEL COMPRESSOR
F23-S/SH, R49/R72-G NEK2150GK
F49-S/SH CAJ2432Z(A)
F72-S/SH CAJ2446Z(H)
R23/R49-S/SH,R23-G SK1A1C-L2W
R72-S/SH CAJ4461Y(A)
GR26H SK182C-L2U
GR48S, GR70H CAJ4476Y(A)
No. Part Name Description Remark
1 COMPRESSOR
2 CONDENSER C1220TS-O,H
3 EVAPORATOR C1220TS-O,H
4 DRYER C1220T-H
5 ACCUMULATOR C1220T-1/4H
6 DISCHARGE PIPE C1220T-O
7 DRYER CONNECT PIPE C1220T-O
8 CAPILLARY TUBE C1220T-H
9 SUCTION PIPE (INNER-CABINET) C1220T-O
10 SUCTION PIPE (COMPRESSOR) C1220T-O
11 CHARGE PIPE (COMPRESSOR) C1220T-O
12 CHARGE PIPE (DRYER) C1220T-O
- 10 – 07/15 Rev. H 146526
3. TROUBLESHOOTING
Is the rated voltage
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Is the power cord
Is the power cord
Is the power switch
Is the power cord
Is the rated voltage
Is the power cord
Plug in
Plug in
Correct
Correct
Defective
Defective
power cord
NORMAL
NORMAL
Move to “ON” position
1) CHECKING THE POWER SUPPLY
① F23 / F49 / F72 / R23 / R49 / R72 ② GR26H / GR 48S / GR70H
Plugged in?
supplied?
normal?
Plugged in?
supplied?
normal?
power cord
“OFF” position?
- 11 – 07/15 Rev. H 146526
2) CHEKING THE POWER SUPPLY OF CONTROL BOARD
NO
YES
Is the rated
Check wirin g
NO
YES
NO
YES
Is the coil winding
open?
Defective
NO
YES
Is the secon dary
normal
NO
YES
Is the DC 24V
Check C/B
NO
YES
Does the contact
continue?
Defective
Defective fuse
Defective
NORMAL
① F23 / F49 / F72 / R23 / R49 / R72
voltage supplied
to the C/B?
Does the fuse f ail?
of transformer
output volt, of trans,
transformer
transformer
NOTES
* C/B: Control Board
(Printed Circuit Board)
* Fuse Spec: AC250V, 8A
* Trans forme r Spec.
Primary: AC1 15V
Secondary: AC12V (Red wire)
AC20V (Blue wire)
supplied to c oil part
in relay?
part in relay
Relay
- 12 – 07/15 Rev. H 146526
3) CHECKING THE CONTROL PART OF REFRIGERATION CYCLE
NO
YES
NO
YES
NO
YES
Check the
in compress or
Defective
OLP
NO
YES
Check the
in compress or
Defective
relay
NO
YES
Are the sens ors in
properly?
NO
YES
Defective
T-sensor
NO
YES
Is the tem p.
properly?
Defective
MICOM
NO
YES
Check the
point
Temperature
Check the
control board
① F23 / F49 / F72 / R23 / R49 / R72
Check the
power supply
Is the to comp.
connected pro per ly?
Are the relay
& OLP in comp.
assembled properly?
continuity of OLP
Correct
Correct
C/B connected
Check the re sistance
of T-Sensor
displayed i n D/B
Correct
continuity of relay
power supply of
temperature set
resetting
Defective compressor
NOTES
* C/B: Control Board
* D/B: Display Board
* OLP: Over load Protector
- 13 – 07/15 Rev. H 146526
② GR26H / GR48S / GR70H
NO
YES
When the
run?
Defective
thermostat
NO
YES
Is the to comp.
NO
YES
Are the relay
NO
YES
Check the
in compress or
Defective compressor
NO
YES
Check the
in compress or
Defective
relay
Defective OLP
Check the
power supply
thermostat is OF F.
Does the comp.
connected pro per ly?
& OLP in comp.
assembled properly?
continuity of OLP
Correct
Correct
continuity of relay
- 14 – 07/15 Rev. H 146526
4) CHECKING THE DEFROST PART
NO
NO
YES
NO
YES
Defective
D-Sensor
NO
YES
Defective
NO
Does the B/M
NO
YES
Defective
Control Board
Check
Defective
YES
YES
① F23 / F49 / F72
Check the
power supply
Do the B/M and D-
Sensor located in
place?
Do the wiring to the
heater and B/M
connected properly?
Check the
resistance of
D-sensor
Correct
wiring
continue below
41℉(5℃)
Dose the defrost
output on C/B normal
in defrost mode?
Defective MICOM
Bi-Metal
Are the defrost
heaters normal?
NOTES
* C/B: Control Board
heater
* B/M: Bi-Metal
(Temp. Limiting Controller)
- 15 – 07/15 Rev. H 146526
② R23 / R49 / R72
NO
YES
NO
NO
YES
Defective
D-Sensor
Defective
Control Board
Defective micom
YES
Check the
power supply
Do the D-Sensor
located in place ?
Check the
resistance of
D-sensor
Dose the defrost
output on C/B normal
in defrost mode?
Correct
NOTES
* C/B: Control Board
- 16 – 07/15 Rev. H 146526
5) WHEN THE UNIT DOES NOT COOL
Apply spacer
YES
Does the
NO
YES
Is the unit
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Does the cond.
YES
NO
NO
YES
Is the
NO
YES
YES
NO
YES
NO
Freezer: Check
Refrigerator:
Excluding GR26H, GR48S
Defective
door switch
Check compressor
① All Models
compressor run
normally?
located in a
level place?
Is the temperature
set point proper?
Check
the control part of
refrigeration cycle
Correct
Temperature
resetting
Is there
dust on condenser
fin?
(eva.) fan motor rotate
normally?
Does the
refrigerant leak?
Clean
Defective
motor, fan
Correct
Are the goods
loaded properly?
Does the cool air
leak?
Does the frost
form excessively
in evaporator?
Correct
Check
door gasket
the defrost part
forced defrost
refrigerant line
restricted?
Is the contact of
door switch normal?
When door closed.
Are the door S/We pushed
by the top of door?
Correct
between door switch
and the top of door
- 17 – 07/15 Rev. H 146526
6) WHEN THERE IS A ABNORMAL NOISE
Is the unit
NO
YES
NO
YES
NO
YES
Reform to
NO
YES
YES
NO
NO
YES
NO
YES
Comp. is running
not cool
YES
Defective
Defective
Defective
① All Models
located in a
level place?
Is the high
voltage supplied?
Are the pipes
rattled?
Are the parts
assembled tightly?
Correct
Adjust
voltage
be free of
contact
Tighten
Are the fans bent?
Do the fans
rotate well?
Is there any
noise in motor?
but the unit does
fan
fan, motor
motor
- 18 – 07/15 Rev. H 146526
NO
YES
Is the connect ion
Check the
in control b oard
NO
YES
7) WHEN THE TEMPERATURE DOES NOT DISPLAY
① F23 / F49 / F72 / R23 / R49 / R72
Check the
power supply
power supply
between C/B and D/B
properly?
Is the micom
inserted on C /B
properly?
Replace display board
NOTES
* C/B: Control Board
Tighten
Tighten
* D/B: Display Board
- 19 – 07/15 Rev. H 146526
8) WHEN THE LAMP DOES NOT LIGHT
Adjust the lamp
YES
Check the
Check the
with socket
Defective
NO
YES
Is the lamp
Defective
NO
YES
Check the
lamp switch
NO
YES
Check wiring
* Incandescence Lamp: 40W
Adjust the lamp
NO
YES
Check the
Check the
with socket
Defective
NO
YES
Is the lamp
Defective
lamp switch
NO
YES
Check the
lamp switch
Defective
ballast
NO
YES
Check wiring
* Fluorescent Lamp: 32W
① F23 / F49 / F72 / R23 / R49 / R72 ② GR26H / GR48S / GR70H
power supply
connecting points
defective?
for good connection
lamp
power supply
connecting points
defective?
for good connection
lamp
continuity of
When door closed.
Are the door S/We pushed
by the top of door?
lamp switch
Apply spacer
between door switch
and the top of door
continuity of
Check the
continuity of
ballast
- 20 – 07/15 Rev. H 146526
9) CHECKING SENSOR
Sensor assembly consists of T-sensor (lead wire: orange) and D-sensor (lead wire: blue).
The T-s ensor is used for cabinet temperature control and the D-sensor is used for defrost control.
The resistance of the sensor varies depending on temperature.
If you Immerse the sensor in a glass containing ice water for 2 minutes and then check for the resistance
between sensor leads, the normal reading is 7.88 ㏀ (T-sensor) / 30 ㏀ (D-sensor).
Resistance (㏀)
Temperature (℉/℃)
T-sensor (±6.5%) D-sensor (±5.5%)
-5 / -21 23.04 79.17
0 / -18 19.76 68.92
10 / -12 14.65 52.61
23 / -5 10.10 37.55
32 / 0 7.88 30.00
41 / 5 6.20 24.13
50 / 10 7.91 19.53
60 / 16 3.82 15.56
70 / 21 3.00 12.48
- 21 – 07/15 Rev. H 146526
4. FEATURE CHART
1) F23/R23-S
2) F49/R49-S
- 22 – 07/15 Rev. H 146526
3) F72/R72-S
4) F23/R23-SH
- 23 – 07/15 Rev. H 146526
5) F49/R49-SH
6) F72/R72-SH
- 24 – 07/15 Rev. H 146526
7) R23-G
8) R49-G
- 25 – 07/15 Rev. H 146526
9) R72-G
DOOR HANDLE
CONDENSER
COMPRESSOR
EVAPORATOR
SHELF
SHELF SUPPORT
DRAIN HOSE
FAN COVER
WATER COLLECTOR
LAMP
DOOR FRAME
AD. PANEL
DRYER
CONDENSER FAN MOTOR
COOLING FAN
COOLING FAN MOTOR
SUCTION PIPE
BALLAST
LOWER GRILLE
MOTOR BRKT
LAMP
COVER LAMP
AD. Panel
Door (Glass)
Lower grille
Adjust foot
Door handle
[ Front view ]
[ Side view ]
10) GR26H
- 26 – 07/15 Rev. H 146526
11) GR48S
Door(Glass)
Door handle
Adjust foot
Lower grille
AD. Panel
[ Front view ]
[ Side view ]
EVAPORATOR
COOLING FAN
COOLING FAN MOTOR
BALLAST
AD. PANEL
WATER COLLECTOR
DRAIN HOSE
SHELF SUPPORT
SHELF
CONDENSER
LOWER GRILL
DOOR HANDLE
DOOR FRAME
COMPRESSOR
SUCTION PIPE
COOLING FAN COVER
LAMP
LAMP TUBE
DRIER
CONDENSER FAN MOTOR
MOTOR BRKT
CENTER POST
LAMP
AD. Panel
Door (Glass)
Lower grille
Adjust foot
Door handle
[ Front view ]
[ Side view ]
12) GR70H
- 27 – 07/15 Rev. H 146526
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