Samsung MH026FNCA, MH035FNCA, MH052FNCA, MH026FECA, MH035FECA Service Manual
...
THE FEATURE OF PRODUCTAIR CONDITIONER
■
Multi Inverter(Free Joint Multi) Series
– Variable Indoor Unit Combination(Free Joint Multi)
– Multi Inverter(Free Joint Multi) Series delivers
comfort to 2~4 rooms with a Single Outdoor Unit
– Smart & Low noise outdoor units in any condition.
■
Energy Saving
– High Efficiency DC inverter and BLDC Comp.
– Smart Inverter Control algorithm.
–
TBR Sine-Wave Compressor & Sine Wave Controller.
■
Convenient Installation
– 485 non Polarity / Auto addressing
– Easy checking system condition by 7-segment
■
Space Saving & Environmental Friendly
– Compact & Light Outdoor Unit
– Slim and Quiet Indoor Units
SER VICE
Manual
Refer to the service manual in the GSPN(see the rear cover) for the more information.
MH026FNCA
MH035FNCA
MH052FNCA
MH026FECA
MH035FECA
MH052FECA
NJ030MHXCA
NJ035MHXCA
NJ052MHXCA
NJ0261HXCA
NJ0351HXCA
MH050FXCA2A
MH080FXCA4A
INDOOR UNIT OUTDOOR UNIT
FREE JOINT MULTI AIR CONDITIONER
Contents
1. Precautions
..........................................................................................................................................
1-1
1-1 Installing the air conditioner
..........................................................................................................
1-1
1-2 Power supply and circuit breaker
..............................................................................................
1-1
1-3 During operation
................................................................................................................................
1-1
1-4 Disposing of the unit
........................................................................................................................
1-2
1-5 Others
.....................................................................................................................................................
1-2
2. Product Specifications
.............................................................................................................
2-1
2-1 The Feature of Product
.................................................................................................................
2-1
2-2 Product Specifications
...................................................................................................................
2-2
2-3 Accessory and Option Specifications
......................................................................................
2-8
3. Alignment and Adjustments
..............................................................................................
3-1
3-1 Error mode and check method
...................................................................................................
3-1
3-2 Setting Option Setup Method
.....................................................................................................
3-7
4. Disassembly and Reassembly
........................................................................................
4-1
4-1 Indoor Unit
...........................................................................................................................................
4-2
4-2 Outdoor Unit
.......................................................................................................................................
4-18
5. Exploded Views and Parts List
.......................................................................................
5-1
5-1 Indoor Unit
...........................................................................................................................................
5-1
5-2 Outdoor Unit
.......................................................................................................................................
5-17
6. Wiring Diagram
...............................................................................................................................
6-1
6-1 Indoor Unit
...........................................................................................................................................
6-1
6-2 Outdoor Unit
.......................................................................................................................................
6-15
7. Schematic Diagram
.....................................................................................................................
7-1
7-1 Indoor Unit
...........................................................................................................................................
7-1
7-2 Outdoor Unit
.......................................................................................................................................
7-15
8. PCB Diagram
.....................................................................................................................................
8-1
8-1 MAIN PCB(Indoor Unit)
.................................................................................................................
8-1
8-2 SUB PCB(Indoor Unit)
...................................................................................................................
8-6
8-3 MAIN PCB(Outdoor Unit)
.............................................................................................................
8-7
Contents
9. Troubleshooting
..............................................................................................................................
9-1
9-1 Items to be checked first
................................................................................................................
9-1
9-2 Checking and Testing operations
...............................................................................................
9-2
9-3 Fault Diagnosis by Symptom
.......................................................................................................
9-12
9-4 PCB Inspection
...................................................................................................................................
9-18
10. Reference for Installation
.......................................................................................................
10-1
10-1 Selecting Area for Installation
....................................................................................................
10-1
10-2 Connecting Up and Purging the Circuit
.................................................................................
10-3
10-3 Refrigerant Refill
..............................................................................................................................
10-5
10-4 Refrigerant Adjustment
.................................................................................................................
10-7
10-5 Flare Nut Fixing Torque
................................................................................................................
10-8
10-6 "Pump down" Procedure
..............................................................................................................
10-9
11. Reference Information
...............................................................................................................
11-1
11-1 Index for Model Name
.................................................................................................................
11-1
11-2 Refrigerating Cycle Diagram
.....................................................................................................
11-4
11-3 Pressure & Capacity mark
.........................................................................................................
11-6
11-4 The abbreviated technology words & the definition of technology terms
..............
11-6
11-5 Q & A for Non-trouble
...................................................................................................................
11-7
11-6 Common sense of refrigeration
...............................................................................................
11-10
1-1Samsung Electronics
1. Precautions
1-1 Installing the air conditioner
● Users should not install the air conditioner by themselves.
Ask the dealer or authorized company to install the air conditioner except the window-type air conditioner in U.S.A and Canada.
● If you don’t install the air conditioner properly, it may cause a fire, a water leakage or an electric shock.
● You must install the air conditioner according to the national wiring regulations and safety regulations.
● Install the indoor unit higher than 8.2ft(2.5m) from the floor to avoid the injury caused by the operation of the fan.
(except the window-type air conditioner)
● The manufacturer is not responsible for any accidents or injury caused by an incorrect installation.
● When installing the built-in type air conditioner, keep all electric cables such as the power cable and the connection cord in pipes,
ducts, or cable channels to protect them from the danger of impact or any other incidents.
● More than 2 indoor units should be installed when you use Free Joint Multi air conditioner.
● MH050FXCA2A
- MH052FNCA, MH052FECA and NJ052MHXCA indoor unit cannot be connected to the MH050FXCA2A outdoor unit.
1-2 Power supply and circuit breaker
● If the power cord of the air conditioner is damaged, it must be replaced by the manufacturer or a qualified person in order to
avoid a hazard.
● The air conditioner must be plugged into an independent circuit if applicable or connect the power cable to the auxiliary circuit
breaker.
An all pole disconnection from the power supply must be incorporated in the fixed wiring with a contact opening of >0.12inch(3mm).
● Do not extend an electric cord to the air conditioner.
● The air conditioner must be plugged in after you complete the installation.
1-3 During operation
● Do not repair the air conditioner at your discretion.
It is recommended to contact a service center directly.
● Never spill any kind of liquid on the air conditioner.
If this happens, turn off the air conditioner and contact an authorized service center.
● Do not insert anything between the airflow blades to prevent damage of the inner fan and consequent injury.
Keep children away from the air conditioner.
● Do not place any obstacles in front of the air conditioner.
● Do not spray any kind of liquid into the indoor unit. If this happens, turn off the air conditioner and contact a service center.
● Make sure that the air conditioner is well ventilated at all times:
Do not place a cloth or other materials over it.
● Remove the batteries if you don’t use the remote control for a long time. (If applicable)
● Use the remote control within 23ft(7m) from the indoor unit. (If applicable)
Samsung Electronics1-2
1-5 Others
● Never store or load the air conditioner upside down or sideways to prevent the damage to the compressor.
● Young children or infirm persons should be always supervised when they use the air conditioner.
● Max current is measured according to IEC standard for safety.
● Current is measured according to ISO standard for energy efficiency.
● When installing, make sure there is no leakage. When recovering the refrigerant, ground the compressor first before removing
the connection pipe. If the refrigerant pipe is not properly connected and the compressor works with the service valve open, the
pipe inhales the air and it makes the pressure inside of the refrigerant cycle abnormally high. It may cause explosion and injury .
● Pump Down Procedure (When removing the product)
- Turn on the air conditioner and select Cool mode to run the compressor for 3 minutes.
- Release the valve caps on High and Low pressure side.
- Use L wrench to close the valve on the high pressure side.
- Approximately 2 minutes after, close the valve on the low pressure side.
- Stop operation of the air conditioner.
- Disconnect the pipes.
1-4 Disposing of the unit
● Before throwing out the air conditioner, remove the batteries from the remote control.
● When you dispose of the air conditioner, consult your dealer. If pipes are removed incorrectly, refrigerant may blow out and
cause air pollution. When it contacts with your skin, it can cause skin injury.
● The package of the air conditioner should be recycled or disposed of properly for environmental reasons.
2-1Samsung Electronics
2. Product Specifications
2-1 The Feature of Product
■ Multi Inverter(Free Joint Multi) Series delivers comfort to 2~4 rooms with a Single Outdoor Unit.
■ Inverter for High Efficiency Operation.
Thanks to inverter control, efficiency of operation of the outdoor unit is enhanced depending on the number of indoor units
operated and the temperature setting.
When only one indoor unit is used, power is saved, resulting in a smaller electricity bill. When all indoor units are used,
high-power operation achieves comfort quickly in all rooms.
■ Installation of indoor units on different floors is possible.
■ Convenient Installation
Auto addressing option : Automated checking of pipe connection.(Refer to the installation manual for detail)
■ Space saving & Environmental Friendly
• Compact & light outdoor unit
• Slim and quiet indoor units
• Pipe size reduction
• Ozone friendly Refrigerant(R410A)
• Lead Free controller.
■ Reliability
• Installation possibilities(Length/Height)
• Convenient installation(485 non polarity/auto-addressing)
• Intelligent control/network
• Easy checking system condition by 7-segment
■ Smart & Low Noise outdoor units in any condition
• TBR/Sine-Wave Controller/Noise Reduction Control/Dual Felt etc.
• Felt Structure : New felt has selected to reduce the noise coming out of the compressor.
Double layered felt structure absorbs noise by two times and felt is also covering top of the compressor to
reduce the noise even more.
Type
Cooling
Btu/hr
Heating
Air Volume
Cooling
m3/min
Heating
Noise
Cooling
dB
Heating
Power ø,V,Hz
Power Consumption
Cooling
W
Heating
Operating Current
Cooling
A
Heating
Outer Dimension
WxHxD
mm
inch
Weight kg
Refrigerant Pipe
Liquid OD(inch)xL(ft)
Gas OD(inch)xL(ft)
Drain Hose DxL(mm)
Type
Blower
Motor
Type
Rated Output W
Heat Exchanger
Refrigerant Control Unit
Samsung Electronics2-2
2-2 Product Specifications
Model
Item
MH026FNCA MH035FNCA
INDOOR UNIT
Size
Performance
Wall-mounted
9,000
10,000
8.31
8.56
32
32
1,208~230,60
30
30
0.18
0.18
825x285x189
32x11x7.4
7.8
ø1/4x24.6
ø3/8x24.6
ø18x535
Cross-fan
Resin/steel
27
2ROW 14STEP
EEV
Wall-mounted
12,000
13,000
9.54
9.93
35
35
1,208~230,60
36
36
0.19
0.19
825x285x189
32x11x7.4
7.8
ø1/4x24.6
ø3/8x24.6
ø18x535
Cross-fan
Resin/steel
27
2ROW 14STEP
EEV
Power
Type
Cooling
Btu/hr
Heating
Air Volume
Cooling
m3/min
Heating
Noise
Cooling
dB
Heating
Power ø,V,Hz
Power Consumption
Cooling
W
Heating
Operating Current
Cooling
A
Heating
Outer Dimension
WxHxD
mm
inch
Weight kg
Refrigerant Pipe
Liquid OD(inch)xL(ft)
Gas OD(inch)xL(ft)
Drain Hose DxL(mm)
Type
Blower
Motor
Type
Rated Output W
Heat Exchanger
Refrigerant Control Unit
2-3Samsung Electronics
Product Specifications(cont.)
Model
Item
MH052FNCA
INDOOR UNIT
Size
Performance
Wall-mounted
18,000
19,000
13.21
14.22
40
40
1,208~230,60
50
50
0.30
0.30
1,065x298x128
42x12x8.6
13
ø1/4x24.6
ø1/2x24.6
ø18x600
Cross-fan
Resin/steel
40
2ROW 16STEP
EEV
Power
Samsung Electronics2-4
Product Specifications(cont.)
Model
Item
MH026FECA MH035FECA MH052FECA
INDOOR UNIT
Size
Performance
Slim Duct
9,000
10,000
8.6
9.0
31
31
1,208~230,60
76
76
0.35
0.35
900x199x600
35.4x7.8x23.6
26
ø1/4x24.6
ø3/8x24.6
Sirocco fan
Resin/steel
47
2ROW 12STEP
EEV
Slim Duct
12,000
13,000
9.8
10.3
32
32
1,208~230,60
76
76
0.35
0.35
900x199x600
35.4x7.8x23.6
26
ø1/4x24.6
ø3/8x24.6
Sirocco fan
Resin/steel
47
2ROW 12STEP
EEV
Slim Duct
18,000
19,000
13.6
14.2
39
39
1,208~230,60
150
150
0.69
0.69
1,100x199x600
43.3x7.8x23.6
31
ø1/4x24.6
ø1/2x24.6
Sirocco fan
Resin/steel
53
2ROW 12STEP
EEV
Type
Cooling
Btu/hr
Heating
Air Volume
Cooling
m
3
/min
Heating
Noise
Cooling
dB
Heating
Power ø,V,Hz
Power Consumption
Cooling
W
Heating
Operating Current
Cooling
A
Heating
Outer Dimension
WxHxD
mm
inch
Weight kg
Refrigerant Pipe
Liquid OD(inch)xL(ft)
Gas OD(inch)xL(ft)
Type
Blower
Motor
Type
Rated Output W
Heat Exchanger
Refrigerant Control Unit
Power
2-5Samsung Electronics
Product Specifications(cont.)
Model
Item
NJ0261HXCA NJ0351HXCA
INDOOR UNIT
Size
Performance
Slim 1 way cassette
9,000
10,000
6.2
7.5
30
30
1,208~230,60
45
45
0.23
0.23
970x135x410
38.2x5.3x16.1
10.5
ø6.35x7.5
ø9.52x7.5
VP20(ID20/OD25)
Cross Flow Fan
Feedback SSR
28
2ROW 12STEP
-
Slim 1 way cassette
12,000
13,000
7.6
8.2
32
32
1,208~230,60
50
50
0.25
0.25
970x135x410
38.2x5.3x16.1
10.5
ø6.35x7.5
ø9.52x7.5
VP20(ID20/OD25)
Cross Flow Fan
Feedback SSR
28
2ROW 12STEP
-
Type
Cooling
Btu/hr
Heating
Air Volume
Cooling
m3/min
Heating
Noise
Cooling
dB(A)
Heating
Power ø,V,Hz
Power Consumption
Cooling
W
Heating
Operating Current
Cooling
A
Heating
Outer Dimension
WxHxD
mm
inch
Weight kg
Refrigerant Pipe
Liquid mmxL(m)
Gas mmxL(m)
Drain Hose ø,mm
Type
Blower
Motor
Type
Rated Output W
Heat Exchanger
Refrigerant Control Unit
Power
Samsung Electronics2-6
Product Specifications(cont.)
Model
Item
NJ030MHXCA NJ035MHXCA NJ052MHXCA
INDOOR UNIT
Size
Performance
Mini 4 way cassette
12,000
13,000
10.8
11.7
34
34
1,208~230,60
110
110
0.47
0.47
575x575x260
22.6x22.6x10.2
17
ø6.35x7.5
ø9.52x7.5
Turbo Fan
steel
55
2ROW 10STEP
EEV
Mini 4 way cassette
12,000
13,000
10.8
11.7
34
34
1,208~230,60
110
110
0.47
0.47
575x575x260
22.6x22.6x10.2
17
ø6.35x7.5
ø9.52x7.5
Turbo Fan
steel
55
2ROW 10STEP
EEV
Mini 4 way cassette
18,000
19,000
12.1
13.6
41
41
1,208~230,60
110
110
0.50
0.50
575x575x260
22.6x22.6x10.2
17
ø6.35x7.5
ø12.7x7.5
Turbo Fan
steel
55
2ROW 10STEP
EEV
Type
Cooling
Btu/hr
Heating
Air Volume
Cooling
m
3
/min
Heating
Noise
Cooling
dB(A)
Heating
Power ø,V,Hz
Power Consumption
Cooling
W
Heating
Operating Current
Cooling
A
Heating
Outer Dimension
WxHxD
mm
inch
Weight kg
Refrigerant Pipe
Liquid mmxL(m)
Gas mmxL(m)
Type
Blower
Motor
Type
Rated Output W
Heat Exchanger
Refrigerant Control Unit
Power
2-7Samsung Electronics
Product Specifications(cont.)
Model
Item
MH050FXCA2A MH080FXCA4A
OUTDOOR UNIT
Power
(Outdoor
Only)
Size
Fan Motor
&
Blower
Com-
pressor
Performance
Free Joint Multi
5,100~18,400
5,100~21,500
32.9
49
51
1,208~230,60
440~1,780
350~1,900
2.5~8.5
2.0~9.1
20
31.1x21.6x11.2
53
Twin Rotary
G8T200FUAEW
BLDC Permanent magnetic Motor
POE
700
OLP
Propeller
ø420
45
2ROW 28STEP
EEV
70.55
Free Joint Multi
6,500~31,700
7,500~34,900
45.4
52
52
1,208~230,60
580~3,420
620~3,190
2.7~15.7
2.8~14.6
30
34.6x31.4x12.2
65
Twin Rotary
G8T260FUAEW
BLDC Permanent magnetic Motor
POE
700
OLP
Propeller
ø460
130
2ROW36STEP
EEV
98.77
Type
Capacity
Cooling
Btu/hr
Heating
Air Volume m
3
/min
Noise
Cooling
dB
Heating
Power ø,V,Hz
Power Consumption
Cooling
W
Heating
Operating Current
Cooling
A
Heating
Fuse Capacity A
Dimension WxHxD inch
Weight kg
Type
Model Name
Motor Type
Lubricant Oil
Type
Capacity cc
Protection Device
Blower
Type
Size
OD(mm)
Motor Rated Output W
Heat Exchanger
Refrigerant Control Device
Charging Refrigerant(R410A) oz
Samsung Electronics2-8
2-3 Accessory and Option Specifications
2-3-1 Indoor Unit Accessories
■ MH✳✳✳FNCA
Item Descriptions Q'TYCode-No. Remark
Indoor
Unit
1
Remote Control 1
User Manual DB98-29162A 1
Installation Manual DB98-29163A 1
DB97-02851B
(MH026FNCA/MH035FNCA)
DB90-02738A
(MH052FNCA)
DB93-03012P
✳ The design and shape can be changed according to the model.
Installation Plate
(Plate-Hanger)
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Disassembly and Reassembly
2-9Samsung Electronics
✳ The design and shape can be changed according to the model.
Indoor Unit Accessories(cont.)
■ MH✳✳✳FECA
Item Descriptions Q'TYCode-No. Remark
Indoor
Unit
User
Manual DB98-29159A 1
Installation Manual 1
Pattern Sheet 1
Insulation-Install Outlet DB72-00143D 1
Insulation-Install Inlet DB72-00143E 1
Drain Hose Joint DB94-00758A 1
DB63-00237A 8
Insulation-Drain Out DB62-03439H 1
Insulation-Out DB62-03439J 2
Insulation-Drain In DB62-03440H 1
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DB98-29160A
Rubber
(Grommet Hanger)
DB97-03906A/B
(MH026FECA/MH035FECA)
DB97-04095A/B
(MH052FECA)
Samsung Electronics2-10
Product Specifications
Indoor Unit Accessories(cont.)
■ MH✳✳✳FECA(cont.)
Item Descriptions Q'TYCode-No. Remark
Indoor
Unit
Cable-tie DB65-10088C 8
Drain Pipe Holder DB90-02064A 2
✳ The design and shape can be changed according to the model.
Product Specifications
2-11Samsung Electronics
Indoor Unit Accessories(cont.)
■ NJ✳✳✳1HXCA
Item Descriptions Q'TYCode-No. Remark
Indoor
Unit
Pattern sheet (Pad Install A) DB69-01947A/B 1
Pattern sheet (Pad Install B) DB69-01936A 1
DB72-00401C 2
Insulation cover band DB72-00109J 1
Installation Manual DB98-33584A 1
DB94-01258C 1
Insulation drain hose DB62-04783A 1
DB63-00237A 8
Insulation hose DB72-00398B 1
Flexible hose
(Ass'y drain hose joint)
Rubber
(Grommet Hanger)
✳ The design and shape can be changed according to the model.
Insulation refrigerant pipe
(Insulation-base)
Product Specifications
Samsung Electronics2-12
✳ The design and shape can be changed according to the model.
Indoor Unit Accessories(cont.)
■ NJ✳✳✳MHXCA
Item Descriptions Q'TYCode-No. Remark
Indoor
Unit
Pad-install DB69-01369A 1
Insulation cover drain DB62-01559A 1
Insulation-cushion pipe in DB62-01959D 1
Insulation cover band DB72-00109J 1
Insulation drain-hose DB62-04783A
Cable-tie DB65-00191A 5
Ass'y drain hose DB94-01270H 1
M4x12 tapped Screw 6002-000213 4
Installation manual DB98-33584A 1
Safety net DB63-01372A 1
1
2-13Samsung Electronics
Product Specifications
Item Descriptions Q'TYCode-No. Remark
Outdoor
Unit
2-3-2 Outdoor Unit Accessories
Drain Plug Out DB67-20011A 1
1
Rubber Leg DB73-20134A 4
Installation Manual DB98-29164A 1
Service Manual DB98-29161A 1
Nipple Connector DB67-00789A
Transmitter power cable
(Ass'y Connector Wire-DC Power)
DB93-05059A
✳ The design and shape can be changed according to the model.
■ MH050FXCA2A/MH080FXCA4A
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1
(MH080FXCA4A)
Product Specifications
Samsung Electronics2-14
Item Descriptions Q'TYCode-No. Remark
Transmitter
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2-3-3 Transmitter Unit Accessories
1
1
1
1
Cable-tie DB65-10088B 3
Installation Manual 1
✳ The design and shape can be changed according to the model.
Transmitter
(Ass'y PCB-DVM Plus I/M)
Transmitter Power cable
(Wire Harness-DC Source)
Transmitter communication cable
(Connect Wire-COM)
Case
(Case-Relay PCB Out)
DB9303568A
(MIM-B13)
DB39-00378E
(MIM-B13)
DB39-00253B
(MIM-B13)
DB98-25776A
(MIM-B13)
DB61-00450B
(MIM-B13)
3-1Samsung Electronics
3. Alignment and Adjustments
3-1 Error mode and check method
3-1-1 Indoor Unit
■ MH✳✳✳FNCA
Main Checking Point
Indicators
Description
OPERATION TIMER TURBO
Indoor unit room temperature sensor error
(open or short)
Indoor unit heat exchanger temperature sensor error
(open or short)
Indoor fan motor malfunction
EEPROM error
Option error
(option wasn t set up or option data error)
Outdoor unit error
Option Setting
-
-
-
Option Setting
Remote Control on/off
Outdoor Unit Power Reset
Alignment and Adjustments
Samsung Electronics3-2
■ MH✳✳✳FECA
The error indicated on the LED display of Indoor unit
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again.
Operating
1. Error of indoor unit :
Displayed on the
indoor unit regardless
of operation
2. Error of outdoor unit :
Displayed on the
indoor unit which is
operating
Displayed on
appropriate indoor unit
which is operating
Displayed on
appropriate indoor unit
which is operating
Displayed on
appropriate indoor unit
which is operating
Displayed on outdoor
unit
Displayed on
appropriate indoor unit
which is operating
Displayed on outdoor
unit
Indicators
Abnormal conditions
Power reset
Error of temperature sensor in indoor unit(OPEN/SHORT)
Error of heat exchanger sensor in indoor unit
Error of heat exchanger OUT sensor in indoor unit
Error of outlet temperature sensor in indoor unit
(OPEN/SHORT): For heat pump models only
Error of mixed operation
Error of outdoor temperature sensor
Error of COND sensor
Error of DISCHARGE sensor
1. No communication for 2 minutes between indoor unit
and outdoor unit (communication error for more than
2 minutes)
2. Indoor unit receiving the communication error from
outdoor unit
3. Outdoor unit tracking 3 minutes error
4. When sending the communication error from outdoor
unit the mismatching of the communication numbers
and installed numbers after completion of tracking.
(communication error for more than 2 minutes)
Self-diagnostic error
(including the indoor unit not detected)
1. Error of electronic expansion valve close
2. Error of electronic expansion valve open
3. Breakaway of EVAOUT sensor
4. Breakaway of EVAIN sensor
Concealed Type
Standard Type
Blue Red
Alignment and Adjustments
3-3Samsung Electronics
■ MH✳✳✳FECA(cont.)
The error indicated on the LED display of Indoor unit
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
◆ If you re-operate the air conditioner, it operates normally at first, then detect an error again.
Operating
Displayed on appropriate
indoor unit which is
operating
Displayed on outdoor
unit
Indicators
Abnormal conditions
5. Breakaway of COND MID sensor
6. 2
nd
detection of refrigerant completely leak
7. 2
nd
detection of high temperature COND
8. 2
nd
detection of high temperature DISCHARGE
9. COMP DOWN due to 2nd detection of low pressure
switch
10. Error of reverse phase
11. Compressor down due to 6th detection of freezing
12. Self-diagnosis of condensation sensor (G8, G9)
13. Compressor down due to condensation ratio control
Error of float switch
Error of setting option switches for optional accessories
EEPROM error
EEPROM option error
Concealed Type
Standard Type
Blue Red
Alignment and Adjustments
Samsung Electronics3-4
Operating
Error of indoor unit:
Displayed on the
indoor unit
regardless of
operation
Displayed on
appropriate indoor
unit which is
operating Displayed
on outdoor unit
Indicators
Abnormal conditions
NJ✳✳✳1HXCA
NJ✳✳✳MHXCA
Power reset
Error of temperature sensor in indoor unit (OPEN/SHORT)
Error of heat exchanger sensor in indoor unit
Error of heat exchanger OUT sensor in indoor unit
Error of outlet temperature sensor in indoor unit
(OPEN/SHORT): For heat pump models only
Error of mixed operation
Error of indoor fan motor : Below 450RPM for 15 minutes
Error of outdoor temperature sensor
Error of CONDENSER sensor
Error of DISCHARGE sensor
1. No communication for 2 minutes between indoor unit and
outdoor unit (communication error for more than
2 minutes)
2. Indoor unit receiving the communication error from
outdoor unit
3. Outdoor unit tracking 3 minutes error
4. When sending the communication error from outdoor unit
due to the mismatching of the communication numbers
and installed numbers after completion of tracking
(communication error for more than 2 minutes)
1. 2
nd
detection of refrigerant completely leak
2. 2
nd
detection of high temperature CONDENSER
3. 2
nd
detection of high temperature DISCHARGE
4. Compressor down due to 6th detection of freezing
Error of float switch
Error of setting option switches for optional accessories
EEPROM error
EEPROM option error
Green Red Yellow Green Orange
: On : Flickering : Off
◆ If you turn off the air conditioner when the LED is flickering, the LED is also turned off.
■ NJ✳✳✳1HXCA/NJ✳✳✳MHXCA
3-5Samsung Electronics
Alignment and Adjustments
3-1-2 Outdoor Unit
Communication error(indoor unable to receive data)
Outdoor unit communication error
(Abnormal data from indoor unit over 60 packet)
Indoor unit room temperature sensor error (Open/Short)
Indoor unit heat exchanger in temperature sensor error (Open/Short)
Indoor unit heat exchanger out temperature sensor error (Open/Short)
Indoor unit sensor error-Evaporator pipe in sensor - Self diagnosis
Indoor unit sensor error-Evaporator pipe out sensor - Self diagnosis
Indoor Unit FAN Error
More than two indoor units cool and heat simultaneously
Indoor Unit EEPROM Error
Indoor Unit EEPROM Option Error
Failure of pipe check operation
No pipe check operation check
- occasion : try to operation after the installation through auto addressing
mode without pipe check operation.
The number of Indoor unit mismatched
Communication error between the outdoor and indoor unit
Outdoor communication error between main PCB and sub PCB
Outside temperature sensor error(Short/Open)
- Error level: over 4.9V(-50˚C) under 0.4V(93˚C)
Condenser temperature sensor error(Short/Open)
- Error level: over 4.9V(-50˚C) under 0.4V(93˚C)
Outdoor unit sensor error - Condenser out sensor(Short/Open) - Self diagnosis
Compressor Discharge temperature sensor error
Compressor discharge sensor detached - Self diagnosis
Compressor OLP sensor error (Short/Open)
- Error condition : outdoor temperature under -20˚C
- Error level : over 4.95V(-30˚C) under 0.5V(151˚C)
REMARK
Display
EXPLANATION(The error indicated on the PCB display of outdoor unit)
Check electrical connection
and setting
Check electrical connection
and setting
Check electrical connection
and setting
Check electrical connection
and setting
Check electrical connection
and setting
Check setting
Samsung Electronics3-6
Alignment and Adjustments
Outdoor Unit(cont.)
Outdoor unit freezing(Compressor stop)
Outdoor unit overload - Safety control(Compressor stop)
Outdoor unit high discharge temperature - Safety control
(Compressor stop)
Outdoor unit EEV open (Stopped indoor unit s) -Self diagnosis
Outdoor unit EEV open (operating indoor unit s) -Self diagnosis
High temperature(over 30˚C) of outdoor as heating mode
Low temperature(under -10˚C) of outdoor as cooling mode
Outdoor Fan Error
Communication cable mismatched between indoor and outdoor unit
Inverter compressor starting failure (5 times)
Compressor trip by input current control mode (PFC over current)
Compressor trip by OLP temperature control mode
DC peak error (IPM Over Current)
Compressor Limit Error
DC link Voltage error (under 150V, over 410V)
Abnormal compressor running
(Compressor Rotation Error)
Current sensor error
DC link Voltage sensor error
OTP Error
Inverter micom zero-crossing error
NO GAS error(self diagnosis)
REMARK
Display
EXPLANATION(The error indicated on the PCB display of outdoor unit)
check pipe length, indoor
unit filter, refrigerant leakage/
charge and service port
check pipe length, refrigerant
leakage/charge
check pipe length, refrigerant
leakage/charge
Check electrical connection
Piping(gas leak)
3-7Samsung Electronics
Step 1 : Enter the Option Setup mode.
1
st
Take out the batteries of remote control.
2
nd
Press the temperature button simultaneously and
insert the battery again.
3
rd
Make sure the remocon display shown as.
3-2 Setting Option Setup Method
ex)
Step 2 : Enter the Option Setup mode and select your option according to the following procedure.
Only blue colored 20 digits should be set
1
st
Set 2 digits using Button.
2
nd
Press button, then will move to down.
3
rd
Set next 2 digits.
4
th
After setting 10 digits, press button, then "OFF timer" will be displayed.
5
th
Set next 2 digits.
Alignment and Adjustments
Samsung Electronics3-8
Step 3 : Upon completion of the selection, check you made right selections.
Whenever you press the button, the set Option will be displayed.
Step 4 : Pressing the ON/OFF button ( )
When pressing the operation ON/OFF key with the direction of remote controller for unit, the sound "Ding" is heard and the
OPERATION LED lamp is flickering at the same time, then the input of option is completed. (If the "ding" sound isn't heard, try
again pressing the ON/OFF button.)
Step 5 : Unit operation test-run
First, Remove the battery from the remote controller.
Second, Re-insert the battery into the remote controller.
Third, Press ON/OFF ( ) key with the direction of remote controller for set.
• Error Mode
1
st
If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press ON/OFF key to retry.
2
nd
If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the
correct option code is set up for its model.
Alignment and Adjustments
3-9Samsung Electronics
External Static Pressure
1.0 2.0(Standard) 3.0 4.0
(mmAq)
015201-14021c 015201-14023E 015201-140390 015203-1403F9
MH026FECA
-200001-300000 -200001-300000 -200001-300000 -200001-300000
MH035FECA
015201-16025F 015201-160370 015203-160183 015203-1603cE
-200001-300000 -200001-300000 -200001-300000 -200001-300000
MH052FECA
011224-1940d5 011224-1940E6 011224-1940F7 011224-194208
-200001-300000 -200001-300000 -200001-300000 -200001-300000
MODEL OPTION CODE
MH026FNCA 027402-14221A-200001-300000
MH035FNCA 027402-16224d-200001-300000
MH052FNCA 026402-19228F-200001-300000
NJ0261HXCA 078605-1420F8-200001-300000
NJ0351HXCA 075605-16225d-200001-300000
NJ030MHXCA
NJ035MHXCA
045023-164148-200001-300000
NJ052MHXCA 045023-1941dF-200001-300000
■ Table of the option code
✳ 2mmAq is the basic model of this product.
✳ Refer to the table above depending on the installation environment.
Samsung Electronics3-10
MEMO
4-1Samsung Electronics
4. Disassembly and Reassembly
■ Necessary Tools
Item Remark
+SCREW DRIVER
MONKEY SPANNER
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