Samsung MH18ZC1(C2)-09 User manual

SERVICE Manual
ROOM AIR CONDITIONER
INDOOR UNIT
MH18ZC1(C2)-09
MH19ZC1(C2)-07
MH19ZC1(C2)-12
MH24ZC1(C2)-12
MH26ZC1(C2)-07
MH26ZC1(C2)-12
OUTDOOR UNIT
MH18ZC1(C2)X
MH19ZC1(C2)X
MH24ZC1(C2)X
MH26ZC1(C2)X
CONTENTSAIR CONDITIONER
1. Precautions
2. Product Specifications
3. Operating Instructions and
Installation
4. Disassembly and Reassembly
5. Troubleshooting
6. Exploded Views and Parts List
7. PCB Diagrams
8. Wiring Diagrams
9. Schematic Diagrams
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1-1Samsung Electronics
1. Warning: Prior to repair, disconnect the power
cord from the circuit breaker.
2. Use proper parts: Use only exact replacement
parts. (Also, we recommend replacing parts
rather than repairing them.)
3. Use the proper tools: Use the proper tools and
test equipment, and know how to use them.
Using defective tools or test equipment may
cause problems later-intermittent contact, for
example.
4. Power Cord: Prior to repair, check the power
cord and replace it if necessary.
5. Avoid using an extension cord, and avoid
tapping into a power cord. This practice may
result in malfunction or fire.
6. After completing repairs and reassembly,
check the insulation resistance.
Procedure: Prior to applying power, measure
the resistance between the power cord and the
ground terminal. The resistance must be
greater than 30 megohms.
7. Make sure that the grounds are adequate.
8. Make sure that the installation conditions are
satisfactory.
Relocate the unit if necessary.
9. Keep children away from the unit while it is
being repaired.
10. Be sure to clean the unit and its surrounding
area.
1. Precautions
Fig. 1-1 Avoid Dangerous Contact
Fig. 1-2 No Tapping and No Extension Cords
Fig. 1-3 No Kids Nearby!
Fig. 1-4 Clean the Unit
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MEMO
Samsung Electronics1-2
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2-1Samsung Electronics
2. Product Specifications
2-1 Table
Model
Item
Type Kw
Cooling/Heating BTU/h
Kcal/h
Dehumiditying L/h
Air volume(Cooling/Heating) m3/min
Noise dB
Power ø-V-Hz
Power Consumption Air volume(Cooling/Heating) W
Operating Current Air volume(Cooling/Heating) A
Starting current(A/B-Unit) A
Power cord(Option)
Connection cable(Option)
Fuse capacity A
Outer WxHxD mm
Dimension inch
Weight kg
Refrigerant pipe Liquid OD(mm)xL(m)
Gas OD(mm)xL(m)
Drain hose OD(mm)xL(m)
Type
Model name
Capacitor
Motor Type
Rated output W
Type
Motor Type
Rated output W
Heat exchange
Refrigerant control unit
Freezer oil capacity cc
Refrigerant to caarge(R22)
Protection device
Cooling test condition
Maxium operation condition
MH18ZC1(C2)
INDOOR UNIT
MH18ZC1(C2)-09
OUTDOOR UNIT
MH18ZC1(C2)X
Compressor
Blower
Power
Size
Perfor-
mance
Wall-Mounting Multi Split
2.63/2.78 5.26/5.56
9000/9500 18000/19000
2268/2394 4536/4788
1.2 -
7.0/7.5 -
36 55
1-220-240V~, 50Hz
890/890 1780/1780
4.0/4.0 8.0/8.0
22.0/22.0
2.5 x 3core
1.0 x 4core
3.15 -
790 x 245 x 165 787 x 620 x 320
31.1 x 9.64 x 6.50 30.98 x 24.41 x 12.6
7.7 56.0
ø6.35 x 5 -
ø9.52 x 5 -
ø18.0 x 2 -
- Rotary
-A:44B092JW1EL
B:44B092JW1EL
-A:30µF 420VAC
B:30µF 420VAC
--
--
Resin Steel
Cross-flow Propeller
22 30
2Row 12Step 2Row 24Step
A/B-Unit:Capillary tube
-A:360
B:360
A-Unit:750g, B-Unit:850g
-A:MRA12037-12007
B:MRA12037-12007
Indoor unit:DB27˚C WB19˚C Outdoor unit:DB35˚C WB24˚C
Indoor unit:DB32˚C WB23˚C Outdoor unit:DB43˚C WB26˚C
DB98_08726A(1)<SM_1 12/19/11 4:33 PM Page 2-1

Samsung Electronics2-2
Table (cont.)
Model
Item
Type Kw
Cooling/Heating BTU/h
Kcal/h
Dehumiditying L/h
Air volume(Cooling/Heating) m3/min
Noise dB
Power ø-V-Hz
Power Consumption Air volume(Cooling/Heating) W
Operating Current Air volume(Cooling/Heating) A
Starting current(A/B-Unit) A
Power cord(Option)
Connection cable(Option)
Fuse capacity A
Outer WxHxD mm
Dimension inch
Weight kg
Refrigerant pipe Liquid OD(mm)xL(m)
Gas OD(mm)xL(m)
Drain hose OD(mm)xL(m)
Type
Model name
Capacitor
Motor Type
Rated output W
Type
Motor Type
Rated output W
Heat exchange
Refrigerant control unit
Freezer oil capacity cc
Refrigerant to caarge(R22)
Protection device
Cooling test condition
Maxium operation condition
MH24ZC1(C2)
INDOOR UNIT
MH24ZC1(C2)-12
OUTDOOR UNIT
MH24ZC1(C2)X
Compressor
Blower
Power
Size
Perfor-
mance
Wall-Mounting Multi Split
3.51/3.80 7.02/7.60
12000/13000 24000/26000
3024/3276 6048/6552
1.8 -
8.5/9.0 -
40 59
1-220-240V~, 50Hz
1280/1350 2560/2700
5.6/5.8 11.2/11.6
26.5/26.5
2.5 x 3core
1.0 x 4core
3.15 -
790 x 245 x 165 1000 x 790 x 310
31.1 x 9.64 x 6.50 39.37 x 31.1 x 12.2
7.7 69.0
ø6.35 x 5 -
ø12.7 x 5 -
ø18.0 x 2 -
- Rotary
-A:48A124JV1EG
B:48A124JV1EG
-A:30µF 420VAC
B:30µF 420VAC
--
--
Resin Steel
Cross-flow Propeller
22 80
2Row 12Step 2Row 30Step
A/B-Unit:Capillary tube
-A:410
B:410
A-Unit:1000g, B-Unit:1000g
-A:MRA12030-12008
B:MRA12030-12008
Indoor unit:DB27˚C WB19˚C Outdoor unit:DB35˚C WB24˚C
Indoor unit:DB32˚C WB23˚C Outdoor unit:DB43˚C WB26˚C
DB98_08726A(1)<SM_1 12/19/11 4:33 PM Page 2-2

2-3Samsung Electronics
MH19ZC1(C2) MH26ZC1(C2)
INDOOR UNIT
MH19ZC1(C2)-07
INDOOR UNIT
MH19ZC1(C2)-12
OUTDOOR UNIT
MH19ZC1(C2)X
INDOOR UNIT
MH26ZC1(C2)-12
INDOOR UNIT
MH26ZC1(C2)-07
OUTDOOR UNIT
MH26ZC1(C2)X
Wall-Mounting Multi Split
2.05/2.05 3.51/3.80 5.56/5.85 3.51/3.80 2.49/2.34 7.61/7.61
7000/7000 12000/13000 19000/20000 12000/13000 8500/8000 26000/26000
1764/1764 3024/3276 4788/5040 3024/3276 2142/2016 6552/6552
0.9 1.8 - 1.8 0.9x2 -
5.5/6.0 8.5/9.0 - 8.5/9.0 5.5/6.0 -
33 40 55 41 35 61
1-220-240V~, 50Hz
700/640 1230/1200 1930/1840 1320/1330 1240/1150 2560/2480
3.1/2.9 5.3/5.3 8.4/8.2 5.8/5.8 5.4/5.1 11.2/10.9
17.0/26.5
2.5 x 3core
1.0 x 4core
3.15 3.15 - 3.15 3.15 -
790 x 245 x 165 790 x 245 x 165 787 x 620 x 320 790 x 245 x 165 790 x 245 x 165 1000 x 790 x 310
31.1 x 9.64 x 6.50 31.1 x 9.64 x 6.50 30.98 x 24.41 x 12.6 31.1 x 9.64 x 6.50 31.1 x 9.64 x 6.50 39.37 x 31.1 x 12.2
7.7 7.7 57.0 7.7 7.7 70.0
ø6.35 x 5 ø6.35 x 5 - ø6.35 x 5 ø6.35 x 5 -
ø9.52 x 5 ø12.7 x 5 - ø12.7 x 5 ø9.52 x 5 -
ø18.0 x 2 ø18.0 x 2 - ø18.0 x 2 ø18.0 x 2 -
- - Rotary - - Rotary
--
A:44A070JW1EC -- A:48A124JV1EG
B:48A124JV1EG B:48A124JV1EG
--
A:25µF 450VAC -- A:30µF 420VAC
B:30µF 420VAC B:30µF 420VAC
------
------
Resin Resin Steel Resin Resin Steel
Cross-flow Cross-flow Propeller Cross-flow Cross-flow Propeller
22 22 30 22 22 80
2Row 12Step 2Row 12Step 2Row 24Step 2Row 12Step 2Row 12Step 2Row 30Step
A/B-Unit:Capillary tube A-Unit:Capillary tube, B/C-Unit:Auto Expansion valve
--
A:260 -- A:260
B:410 B:410
A-Unit:740g, B-Unit:950g A-Unit:860g, B/C-Unit:1250g
--
A:MST24AMN-12008 -- A:MRA12030-12008
B:MRA12030-12008 B:MRA12030-12008
Indoor unit:DB27˚C WB19˚C Outdoor unit:DB35˚C WB24˚C
Indoor unit:DB32˚C WB23˚C Outdoor unit:DB43˚C WB26˚C
DB98_08726A(1)<SM_1 12/19/11 4:33 PM Page 2-3

Samsung Electronics2-4
2-2 Dimensions
2-2-1 Indoor Unit
245
165
790
Air
in
(Front view)
(Remote control)
Air out
Installation plate
2245
115
DB98_08726A(1)<SM_1 12/19/11 4:33 PM Page 2-4

Product Specifications
2-5Samsung Electronics
2-2-2 Outdoor Unit
2-2-2(a) MH24ZC1(C2)X
2-2-2(b) MH18ZC1(C2)X/MH19ZC1(C2)X
(Front view) (Rear view)
1000 340
790
310
660
(Front view) (Rear view)
582
787 340
620
320
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Product Specifications
Samsung Electronics2-6
2-2-2 Outdoor Unit
2-2-2(c) MH26ZC1(C2)X
(Front view) (Rear view)
1000 340
790
310
660
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2-7Samsung Electronics
2-3 Refrigerating Cycle Block Diagram
2-3-1 MH18ZC1(C2)X / MH19ZC1(C2)X / MH24ZC1(C2)X
STD Pressure Piping Temp.(˚C) Temp. Condition (˚C)
Operating Condition (kg/cm2G) T1 T2 Indoor Outdoor
3-way valve DB WB DB WB
Standard 5.0~5.2 11 10 27 19 35 24
A or B Max over load 5.4~5.6 17 16 32 23 43 26
Cooling Low temp. 3.5~3.7 4 3 21 15 21 15
Standard 5.0~5.2 12 10 27 19 35 24
A + B Max over load 5.4~5.6 17 16 32 23 43 26
Low temp. 3.5~3.7 4 3 21 15 21 15
Standard 17~19 38 59 20 15 7 6
A or B Max over load 19~25 56 49 27 19 24 18
Heating Deice - - - 20 12 2 1
Standard 17~19 33 55 20 15 7 6
A + B Max over load 19~25 56 48 27 19 24 18
Deice - - - 20 12 2 1
INDOOR UNIT OUTDOOR UNIT
Capillary tube Capillary tube
Heat
exchanger
(Condenser)
4Way valve
3Way valve
2Way valve
Compressor-B
Compressor-A
Gas side
Liquid side
Cross fan
Cross fan
Propeller fan
T2
T1
(A) (B)
Check valve
Cooling
Heating
Gas leak
check point
Heat
exchanger
(Evaporator)
Refrigerating cycle temperature and pressure
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