VESSER COMMERCIAL AIR CONDITIONER
DUCT TYPE SPLIT AIR CONDITIONER
Duct Type Split Air Conditioner
Service Manual
（T1/R410A/50HZ）
VIDCON Ltd.
1
CONTENTS
PRODUCT.......................................................................................................................................1
1 MODELS LIST........................................................................................................................2
2 NOMENCLATURE.................................................................................................................2
3 FUNCTION ..............................................................................................................................4
4
PRODUCT DATA....................................................................................................................5
4.1 Product Data at Rated Condition.................................................................................5
4.2 Operation Range........................................................................................................13
5 PIPING DIAGRAM............................................................................................................... 13
5.1 Cooling Only............................................................................................................. 13
5.2 Heat Pump................................................................................................................. 14
CONTROL .................................................................................................................................... 15
1 OPERATION FLOWCHART..............................................................................................16
1.1 Cooling/Dry Operation..............................................................................................16
1.2 Heating Operation .....................................................................................................17
2 MAIN LOGIC........................................................................................................................18
2.1 Cooling...................................................................................................................... 18
2.2 Dry Mode ..................................................................................................................18
2.3 Heating Mode............................................................................................................ 19
2.4 Defrosting..................................................................................................................19
2.5 Fan Mode ..................................................................................................................20
3.WIRED REMOTE CONTROLLER....................................................................................25
3.1 Displaying Part.......................................................................................................... 25
3.2 Buttons......................................................................................................................27
3.3 Installation of Wired Controller and Project Debugging........................................... 28
3.4 Instruction to Operation ............................................................................................30
3.5 Error Display.............................................................................................................42
3.6 Setting of Indoor Room Sensor and Checking of Outdoor Ambient Temperature ... 43
4 Wireless Remote Controller................................................................................................ 45
5 Centralized Controller-week timer ...................................................................................... 47
5.1 Function ....................................................................................................................47
5.2 Operation View ......................................................................................................... 48
5.3 Display View.............................................................................................................48
5.4 Dimensions................................................................................................................49
INSTALLATION...........................................................................................................................50
1 INDOOR UNIT INSTALLATION....................................................................................... 51
1.1 Before Installation.....................................................................................................51
1.2 Installation Site..........................................................................................................51
1.3 Dimension Data.........................................................................................................51
1.4 Installation Clearance Data .......................................................................................52
1.5 Drain Piping Work ....................................................................................................53
2 OUTDOOR UNIT INSTALLATION ..................................................................................53
2.1 Before Installation.....................................................................................................53
2.2 Installation Site..........................................................................................................53
2.3 Dimension Data.........................................................................................................54
2.4 Installation Clearance Data .......................................................................................56
3 REFRIGERATION PIPING WORK ..................................................................................56
3.1 Refrigeration Piping Work Procedures......................................................................56
3.2 Caution in Connecting Pipes.....................................................................................57
3.3 Specification of Connection Pipe..............................................................................57
4 ELECTRIC WIRING WORK.............................................................................................. 57
4.1 Wiring Principle ........................................................................................................ 57
4.2 Ele
ctric Wiring Design
..............................................................................................58
4.3 Specification of Power Supply Wire and Air Switch ................................................61
MAINTENANCE.......................................................................................................................... 62
1 TROUBLE TABLE................................................................................................................63
2 FLOW CHART OF TROUBLESHOOTING .....................................................................65
2.1 High Pressure Protection...........................................................................................65
2
2.2 Low Pressure Protection ...........................................................................................66
2.3 Discharge protection .................................................................................................67
2.4 Overcurrent Protection .............................................................................................. 67
2.5 Communication Malfunction ....................................................................................68
2.6 Indoor Fan Overloading Protection........................................................................... 69
2.7 F0 Failure of Indoor Room Sensor at Air Intake.......................................................70
2.8 F1 Failure of Evaporator Temp. Sensor ....................................................................70
3 WIRING DIADRAM............................................................................................................. 71
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS.......................... 75
5 EXPLODED VIEWS AND PART LIST.............................................................................. 77
5.1 Indoor Unit................................................................................................................77
5.2 Outdoor Unit .............................................................................................................85
VESSER COMMERCIAL AIR CONDITIONER
DUCT TYPE SPLIT AIR CONDITIONER
PRODUCT
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
2
1 MODELS LIST
Capacity
（kW/Ton）
Appearance
Units
Series
Model Name
Cooling Heating
Ref
Outdoor Indoor
DGU68HN indoor
20/5.6
22/6.16
GU68N3 Outdoor
R410
A
DGU8
5HN indoor
24.5/6.86 27.5/7.7
GU85N3 Outdoor
R410
A
DGU102HN indoor
30/8.4 33/9.24
GU102N3 Outdoor
R410
A
DGU136HN indoor
39.5/11.06 42/11.76
Duct Type
GU136N3 Outdoor
R410
A
Note:1Ton =12000Btu/h = 3.517kW
2 NOMENCLATURE
DG
Supplementation code
Control method
Frequency conversion system
New System for EU : E
Cooling capacity: Btu
Product type: U - ductable
Air-duct
air supply
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
3
Meaning of standard model before“/”
Meaning
Expression method
DG
Air-duct air supply
Heat pump type- standard
Heat pump auxiliary electric heat type-R
Unit type
Auxiliary hot water plate and pipe type-W
Cooling capacity
Nominal cooling capacity (kW)
Common type-omitted
High static pressure-HN
Static pressure type
The outdoor unit is not expressed.
Fixed frequency-omitted
Frequency conversion system
Frequency conversion-P
Routine -omitted
Control method
Remote monitoring-Y
Meaning of supplementation code after “/”
Meaning
Expression method
Design No. Arranged based on A, B, C…
R22-omitted
R4
07- on request
R4
10a-N -standard
Refrigerant
Others to be applied for when they are used
Production method Self-control-omitted
380-415V 3Ph～,50Hz-M
Power type
(The unit to be exported must be expressed)
Outdoor u
nit-（GU）
Indoor un
it-（DGU）
Indoor and outdoor unit code
The entire unit is not expressed.
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
4
3 FUNCTION
Features-outdoor units
Features Description
Quality condenser coil The coil is constructed of golden aluminum sheet and inner groove copper pipe
Coil protected Coils are protected from damage by a metal grill
Protected compressor
High/low pressure protection, discharge high temperature protection, overload protection,
reverse (open) phase protection, sensor malfunction alarm
Resisting corrosion
Cabinet is made of pre-painted steel. The pre-treated flat galvanized steel provides a better paint
to steel bond, which resists corrosion and rust creep. Special primer formulas ensure minimal
fading when exposed to sunlight
Low operating sound
level
Low noise fan and low noise compressor with isolator
Low maintenance Quality compressor and motor are used
Factory tested
All units are factory tested prior to dispatch to verify system operation and control functioning
before shipment
Features-indoor units
features Description
Flexible installation Condensing water tube and refrigerant tube are in same direction, it’s better for installation
Long-distance duct air
supply
It adopts high static pressure design, so air is centralized handling in the indoor unit and implant
long-distance duct air supply
The capacity range The capacity range is 20kW to 40kW
Convenient operation Simple controller and intelligent remote controller make unit more convenient operation
Good indoor air quality
It can connect many supply-air outlet to the duct, so that it can make the temperature and
humidity of the whole room equality, meanwhile, it can lead in fresh air, makes well indoor unit
air quality. All units are provided with filters that are easily accessible from the rear of the unit.
Microcomputer control
The controls provide for compressor delay protection, Remote control function, temperature
setting, fan function, sleep function, memory function, self-diagnosis with alarm function.
Quality evaporator Evaporator coils are constructed of inner groove copper tube and hydrophilic aluminum sheet
Low operating sound The fan motors are resilient mounted to minimize vibration and noise
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
5
4 PRODUCT DATA
4.1 Product Data at Rated Condition
DGU68HN DGU85HN
Indoor
Unit
20 25
GU68N3 GU85N3
Models
Outdoor
Unit
20 25
Btu/h 68000 83598
Cooling
kW 20 24.5
Btu/h 75000 93834
Nominal Capacity At Rated ESP
Heating
kW 22 27.5
Power Supply V/Ph/Hz 380-415/3/50
Cooling 8.4 9.8
Power Consumption
Heating
kW
7 9.0
Cooling 15.3 19.2
Running Current
Heating
A
13.2 17.7
Refrigerant Type R410a
Refrigerant Charge kg 5.3 6.7
Power Supply V/Ph/Hz 380-415/3/50
Type Centrifugal / Belt Drive
CFM 2380 2825
Air flow
m
3
/h 4000 4800
Input Power W 1100 1500
Running Current A 2 3.4
in.wg 0.8 0.44
Rated ESP
Pa 200 110
Fan Motor Protection
－
Overload protection
Fan
Sound Pressure Level
(H/M/L/SL)
dB(A) 56 54
Material
－
Inner Groove Copper Tube
Tube
Diameter mm 7 7.94
Material
－
Aluminum
Coil
Fin
No.of Rows/FPI
－
3/16 3/16
Coil Area Sqm 0.766 0.63
Height 389/400 500/673
Width 1463/1540 1500/1840
Dimensions
(Outline/Package)
Depth
mm
799/880 1000/1200
Weight(Net/Gross) kg 86/109 150/200
System Operation Control
－
Wired Control with LED Display + Wireless Controller
Condensate Drainage(O.D) mm 25.4
Indoor Unit
Air Filter
－
Standard Washable and Synthetic
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
6
DGU68HN DGU85HN
Indoor Unit
20 25
GU68N3
FGR/CNa-M(O)
Models
Outdoor
Unit
20 25
Power Supply V/Ph/Hz 380-415/3/50
Compressor Type Scroll
Nominal Current 12.87 16.4
L.R.A
A
98 142
Vibration Isolator Rubber
Compressor
Protection Device Auto Reset Thermal Overload
Fan Type/Drive Inner Groove Copper Tube
Fan Speed rpm 850±30 850
Blade Material Plastic
Fan
Diameter mm 524 524
Tube Material Inner Groove Copper Tube
Material Aluminum
Coil
Fin
No.of Rows/FPI 2/14.1 2/15
Coil Area Sqm 1.32 1.52
Sound Pressure Level dB(A) 65 66
Height 1350/1370 1600/1715
Width 1150/1300 1150/1305
Dimension
(Outline/Package)
Depth
mm
460/500 360/502
Weight(Net/Gross) kg 158/174 200/230
Suction "3/4 "1
Outdoor Unit
Pipe sizes
Liquid
Inch
"3/8 "3/8
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
7
DGU68HN
DGU85HN
Indoor
Unit
GU68N3
GU85N3
Models
Outdoor
Unit
Btu/h 68000 83598
Cooling
kW 20 24.5
Btu/h / /
Nominal Capacity
At Rated ESP
Heating
kW / /
Power Supply V/Ph/Hz 380-415/3/50
Cooling 8.4 9.8
Power Consumption
Heating
kW
/ /
Cooling 15.3 19.2
Running Current
Heating
A
/ /
Refrigerant Type R410a
Refrigerant Charge kg 5.3 6.7
Power Supply V/Ph/Hz 380-415/3/50
Type Centrifugal / Belt Drive
CFM 2380 2825
Air flow
m3/h 4000 4800
Input Power W 1100 1500
Running Current A 2 3.4
in.wg 0.8 0.44
Rated ESP
Pa 200 110
Fan Motor Protection
－
Overload protection
Fan
Sound Pressure Level
(H/M/L/SL)
dB(A) 56 54
Material
－
Inner Groove Copper Tube
Tube
Diameter mm 7 7.94
Material
－
Aluminum
Coil
Fin
No.of Rows/FPI
－
3/16 3/16
Coil Area Sqm 0.766 0.63
Height 389/470 500/673
Width 1463/1540 1500/1840
Dimensions
(Outline/Package)
Depth
mm
799/880 1000/1200
Weight(Net/Gross) kg 86/109 150/200
System Operation Control
－
Wired Control with LED Display + Wireless Controller
Condensate Drainage(O.D) mm 25.4
Indoor Unit
Air Filter
－
Standard Washable and Synthetic
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
8
DGU68HN DGU85HN
Indoor Unit
20 25
GU68N3
FGR/CNa-M(O)
Models
Outdoor
Unit
20 25
Power Supply V/Ph/Hz 380-415/3/50
Compressor Type Scroll
Nominal Current 12.87 16.4
L.R.A
A
98 142
Vibration Isolator Rubber
Compressor
Protection Device Auto Reset Thermal Overload
Fan Type/Drive Inner Groove Copper Tube
Fan Speed rpm 850±30 850
Blade Material Plastic
Fan
Diameter mm 524 524
Tube Material Inner Groove Copper Tube
Material Aluminum
Coil
Fin
No.of Rows/FPI 2/14.1 2/15
Coil Area Sqm 1.32 1.52
Sound Pressure Level dB(A) 65 66
Height 1350/1370 1600/1715
Width 1150/1300 1150/1305
Dimension
(Outline/Package)
Depth
mm
460/500 360/502
Weight(Net/Gross) kg 158/174 200/230
Suction "3/4 "1
Outdoor Unit
Pipe sizes
Liquid
Inch
"3/8 "3/8
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
9
DGU (model) HN
Indoor
Unit
102 136
GU (model) N3
Models
Outdoor
Unit
102 136
Btu/h 102000 134780
Cooling
kW 30 39.5
Btu/h 112500 143310
Nominal Capacity
At Rated ESP
Heating
kW 33 42
Power Supply V/Ph/Hz 380-415/3/50
Cooling 11 15.8
Power Consumption
Heating
kW
9 14
Cooling 20.7 30
Running Current
Heating
A
18 26.6
Refrigerant Type R410a
Refrigerant Charge kg 9.5 10.5
Power Supply V/Ph/Hz 380-415/3/50
Type Centrifugal / Belt Drive
CFM 3230 4120
Air flow
m
3
/h 5500 7000
Input Power W 1500 2200
Running Current A 3.7 4.2
in.wg 0.8 0.6
Rated ESP
Pa 200 150
Fan Motor Protection
－
Overload protection
Fan
Sound Pressure Level
(H/M/L/SL)
dB(A) 57 58
Material
－
Inner Groove Copper Tube
Tube
Diameter mm 9.52 9.52
Material
－
Aluminum
Coil
Fin
No.of Rows/FPI
－
4/16 3/16
Coil Area Sqm 0.672 0.86
Height 500/673 650/835
Width 1500/1840 1700/1890
Dimensions
(Outline/Package)
Depth
mm
1000/1200 1100/1460
Weight(Net/Gross) kg 156/206 215/265
System Operation Control
－
Wired Control with LED Display + Wireless Controller
Condensate Drainage(O.D) mm 25.4
Indoor Unit
Air Filter
－
Standard Washable and Synthetic
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
10
DGU (model) HN
Indoor Unit
102
136
GU (model) N3
Models
Outdoor
Unit
102
136
Power Supply V/Ph/Hz 380-415/3/50
Compressor Type Scroll
Nominal Current 16.93 27.6
L.R.A
A
197
Vibration Isolator Rubber
Compressor
Protection Device Auto Reset Thermal Overload
Fan Type/Drive Inner Groove Copper Tube
Fan Speed rpm 660 730
Blade Material Plastic
Fan
Diameter mm 750 750
Tube Material Inner Groove Copper Tube
Material Aluminum
Coil
Fin
No.of Rows/FPI 2/14.1 2/15
Coil Area Sqm 2.23 2.79
Sound Pressure Level dB(A) 67 69
Height 1190/1772 1772/1950
Width 974/990 1290/1370
Dimension
(Outline/Package)
Depth
mm
556/880 880/980
Weight(Net/Gross) kg 216/266 200/230
Suction "9/8 "9/8
Outdoor Unit
Pipe sizes
Liquid
Inch
"1/2 "5/8
1
42
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
11
DGU (model) HN
Indoor
Unit
102 136
GU (model) N3
Models
Outdoor
Unit
102
136
Btu/h 102000 134780
Cooling
kW 30 39.5
Btu/h / /
Nominal Capacity
At Rated ESP
Heating
kW / /
Power Supply V/Ph/Hz 380-415/3/50
Cooling 11 15.8
Power Consumption
Heating
kW
/ /
Cooling 20.7 30
Running Current
Heating
A
/ /
Refrigerant Type R410a
Refrigerant Charge kg 9.5 10.5
Power Supply V/Ph/Hz 380-415/3/50
Type Centrifugal / Belt Drive
CFM 3230 4120
Air flow
m
3
/h 5500 7000
Input Power W 1500 2200
Running Current A 3.7 4.2
in.wg 0.8 0.6
Rated ESP
Pa 200 150
Fan Motor Protection
－
Overload protection
Fan
Sound Pressure Level
(H/M/L/SL)
dB(A) 57 58
Material
－
Inner Groove Copper Tube
Tube
Diameter mm 9.52 9.52
Material
－
Aluminum
Coil
Fin
No.of Rows/FPI
－
4/16 3/16
Coil Area Sqm 0.672 0.86
Height 500/673 650/835
Width 1500/1840 1700/1890
Dimensions
(Outline/Package)
Depth
mm
1000/1200 1100/1460
Weight(Net/Gross) kg 156/206 215/265
System Operation Control
－
Wired Control with LED Display + Wireless Controller
Condensate Drainage(O.D) mm 25.4
Indoor Unit
Air Filter
－
Standard Washable and Synthetic
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
12
DGU (model) HN
Indoor Unit
102 136
GU (model) N3
Models
Outdoor
Unit
102 136
Power Supply V/Ph/Hz 380-415/3/50
Compressor Type Scroll
Nominal Current 16.93 27.6
L.R.A
A
197
Vibration Isolator Rubber
Compressor
Protection Device Auto Reset Thermal Overload
Fan Type/Drive Inner Groove Copper Tube
Fan Speed rpm 660 730
Blade Material Plastic
Fan
Diameter mm 750 750
Tube Material Inner Groove Copper Tube
Material Aluminum
Coil
Fin
No.of Rows/FPI 2/14.1 2/15
Coil Area Sqm 2.23 2.79
Sound Pressure Level dB(A) 67 69
Height 1190/1772 1772/1950
Width 974/990 1290/1370
Dimension
(Outline/Package)
Depth
mm
556/880 880/980
Weight(Net/Gross) kg 216/266 200/230
Suction "9/8 "9/8
Outdoor Unit
Pipe sizes
Liquid
Inch
"1/2 "5/8
Note：
① Nominal capacities are based on the follow conditions.
Indoor Outdoor
Cooling
DB：27 (80.6 )℃ ℃
WB：19 (66.2 )℃ ℃
DB：35 (95 )℃ ℃
WB：/(/)℃ ℃
Heating
DB：20 (68 )℃ ℃
WB：/(/)℃ ℃
DB：7(44.6)℃ ℃
WB：6(42.8)℃ ℃
Piping Length 7.5m
142
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
13
4.2 Operation Range
5 PIPING DIAGRAM
5.1 Cooling Only
Indoor Unit
Indoor fan
Outdoor Unit
Electronic expansion valve
Outdoor fan
Condenser
Filter
Gas-liquid separator
compressor
Evaporator
Test condition Indoor side Outdoor side
DB(℃) WB(℃) DB(℃) WB(℃)
Nominal cooling 27 19 35 24
Nominal heating 20 -- 7 6
Rated cooling 32 23 43 26
Low temp cooling 21 15 18(-10) --
Rated heating 27 -- 24 18
Low temp heating 20 -- -7 -8
DUCT TYPE SPLIT AIR CONDITIONER PRODUCT
14
5.2 Heat Pump
4-way vavel
D
C
S
E
Indoor Unit
Indoor fan
Outdoor Unit
Electronic expansion valve
Outdoor fan
Condenser
Filter
Gas-liquid separator
compressor
Evaporator
VESSER COMMERCIAL AIR CONDITIONER
DUCT TYPE SPLIT AIR CONDITIONER
CONTROL
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
16
1 OPERATION FLOWCHART
1.1 Cooling/Dry Operation
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
17
1.2 Heating Operation
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
18
2 MAIN LOGIC
The followings are for DGU68HN/GU68N3 Cooling
Cooling mode
Compressor
Outdoor fan
Indoor fan
4-way valve
OFF
ON
OFF
ON
OFF
OFF
ON
Run at set speed
Time
OFF
OFF
Manually OFF
OFF
Htap
When Tambient≥Tset+1 , the unit will run in cooling mode. In this case, compressor and outdoor fan ℃
run; Indoor fan runs at setting speed.
When T
ambient≤Tset-1℃, the unit will stop running in cooling mode. In this case, compressor and
outdoor fan stop running; Indoor fan runs at setting speed.
When T
set -1℃＜Tambient≤Tset+1 ,the unit will keep its previous running state.℃
2.2 Dry Mode
OFF
ON
OFF
OFF
OFF
OFF
OFF
Manually OFF
Compressor
Outdoor fan
Indoor fan
4-way valve
ON
OFF
ON
Htap
Run at low speed
Time
Dry mode
When Tambient≥Tset+2 , ℃ the unit will run in cooling mode. In this case, compressor and outdoor fan
run; Indoor fan runs at low speed.
When Tambient≤Tset-2 ,the unit will stop running in cooling mode. In this case, compressor and ℃
outdoor fan stop running.
When Tset -2℃＜Tambient≤Tset+2 ,the unit will be in the state that the compressor runs for 6min ℃
and stops for 4min in cycle. Indoor fan runs at low speed.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
19
2.3 Heating Mode
Compressor
Outdoor fan
Indoor fan
4-way valve
OFF
ON
OFF
ON
OFF
OFF
ON
Run under set
speed
Time
OFF
OFF
ON
ON
Anti-cold air
Auxiliary
heater
OFF
OFF
OFF
OFF
ON
Running condition
is met
Blowing residual heat
Manually OFF
Heating mode
When Tambient≤Tset-1 , the unit will run in heating mode. In this case, comp℃ ressor and outdoor fan
run; Indoor fan runs at setting speed and under the condition of anti-cold air.
When Tambient≥Tset+1 ,compressor and outdoor fan stop running, the 4℃ -way valve is still energized
and indoor fan runs under the condition of blowing residual heat.
When Tset -1℃＜Tambient＜Tset+1 ,the unit will keep its previous running state.℃
2.4 Defrosting
ON
ON
Run at set speed
OFF
End defrosting
ON
OFF
OFF
OFF
ON
ON ON
ON
ON
ON
Compressor
Outdoor fan
Auxiliary
heater
Indoor fan
4-way valve
Satrt defrostig
Running conditions
are met
Time
Anti c old air
Defroting mode
Defrosting start condition: If the unit heats for 44min accumulatively, the compressor continuously
runs for 4min and 50s, and T condensate≤-5 ,defrosting will ℃ start. If there is auxiliary heater, it will stop
firstly and then the 4-way valve, indoor fan and outdoor fan will stop in 10s and the compressor will
compulsively run.
Defrosting end condition: If the unit defrosts for 10min or T condensate≥10 , defrosting will end, ℃
4-way valve will start running, outdoor fan will run, and compressor compulsively run. Indoor fan will run
under the anti-cold air condition.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
20
2.5 Fan Mode
Compressor
Outdoor fan
Indoor fan
4-way valve
OFF
OFF
OFF
OFF
ON
Run at set
speed
Time
OFF
Manually OFF
OFF
Htap
Indoor fan will run at high speed for 5s and then at setting speed.
GU85N3 GU136N3：
1.
Cooling mode
Sequence chart of unit stop during cooling operation
Fan mode
Compressor
Outdoor fan
Indoor fan
OFF
OFF
High speed
Time
OFF
ON
Control object
180S
5S
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
21
Sequence chart of unit start during cooling operation
Fan mode
Compressor
Outdoor fan
Indoor fan
ON
High speed
Time
OFF
Control object
360S
10S
ON
ON
OFF
V(set)
ON
When Tambient≥Tset+1 , the unit will run in cooling mode. In this case, compressor and outdoor fan ℃
run; Indoor fan runs at setting speed.
When Tambient≤Tset-1 , the unit will stop running in cooling mode. In this case, c℃ ompressor and
outdoor fan stop running; Indoor fan runs at setting speed.
When Tset -1℃＜Tambient≤Tset+1 ,the unit will keep its previous running state.℃
2、Dry mode
Normally on m
ode during dry operation
Compressor
Outdoor fan
Indoor fan
OFF
OFF
High speed
Time
ON
Control object
180S
5S
OFF
Vset
ON
ON
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
22
Start for 6min and stop for 4min during dry operation
Compressor
Outdoor fan
Indoor fan
ON
Time
OFF
Control object
360S
240S
ON
ON
OFF
ON
ON
OFF
OFF
ON
ON
360S
240S
10S
5S
5S
10S
Room temperature is set to be 16-30℃ and 24℃ is default.
When Tambient≥Tset+2 , the unit will run in cooling mode. In this case, compressor and outdoor fan ℃
run; Indoor
fan runs at low speed.
When Tambient≤Tset-2℃, the unit will stop running in cooling mode. In this case, compressor and
outdoor fan stop running.
When Tset -2℃＜Tambient≤Tset+2 ,the unit will be in the state that the compressor runs for 6min ℃
and stops for 4min in cycle. Indoor fan runs at low speed.
3、Fan mode
Sequence chart during fan operation
Compressor
Outdoor fan
Indoor fan
OFF
Time
Control object
ON
ON
ON
ON
ON
OFF
OFF
OFF
Run for 45min
45min50s
60s
Defrosting
command
Outdoor
Auxiliary electric
heater
4-way valve
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
23
When fan mode is set, the unit will run in fan mode.
Other parts
Indoor fan
Time
Control object
ON
ON
OFF
V(set)
4、Heating mode
Sequence chart of unit start during heating operation
Indoor fan
Compressor
Outdoor fan
Time
Auxiliary electric
heater (AEH)
>180S
5S
ON
ON
ON
OFF
OFF
OFF
OFF
(Vset
)
ON
ON
(AEH working condition)
(
Anti cold air condition)
>180S
5S
Control object
4-way valve
Sequence chart of unit stop during heating operation
Time
10S
60S
Control object
Compressor
Outdoor fan
Indoor fan
Auxiliary
electric heater
4-way
valve
ON
ON
ON
ON
ON
OFF
OFF
OFF
(AEH woking condition）
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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Room temperature is set to be 16-30 and 24 is default. ℃℃
When Tambient≤Tset-1 , the unit will run in heatin℃ g mode. In this case, compressor and outdoor fan
run; Indoor fan runs at setting speed and under the condition of anti-cold air.
When Tambient≥Tset+1 ,compressor and outdoor fan stop running, the 4℃ -way valve is still energized
and indoor
fan runs under the condition of blowing residual heat.
When Tset -1℃＜Tambient＜Tset+1 ,the unit will keep its previous running s℃ tate.
5、Defrosting mode
Sequence chart of unit start during defrosting operation
Compressor
Outdoor fan
Indoor fan
OFF
Time
Control object
ON
ON
ON
ON
ON
OFF
OFF
OFF
Run for 45min
45min50s
60s
Defrosting
command
Outdoor
Auxiliary electric
heater
4-way valve
Sequence chart of unit stop during defrosting operation
ON
ON
Time
ON
OFF
ON
OFF
Defrosting end
OFF
(anti cold air )
(AEH working condition)
OFF
ON
Control objec t
Compressor
Outdoor fan
Indoor fan
4-way valve
Auxiliary electric
heater
If the unit heats for 45min accumulatively, the compressor continuously runs for 4min and 50s, and T
condensate≤-5℃ for 1s, defrosting will start.
If the unit defrosts for 10min or T condensate≥10 ,℃ defrosting will end.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
25
3.WIRED REMOTE CONTROLLER
3.1 Displaying Part
Fig.3.1 Outline of wired controller
3.1.1 LCD Display of Wired Controller
Fig.3.2 LCD display
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.1.2 Instruction to LCD Display
No. Description Instruction to Displaying Contents
1
Swing＊
Swing function
2
Air ＊
Air exchange function
3 Sleep Sleeping states
4 Running mode Each kind of running mode of indoor unit (auto mode)
5 Cooling Cooling mode
6 Dry Dry mode
7 Fan Fan mode
8 Heating Heating mode
9 Defrost Defrosting state
10
Gate-control card＊
Gate control
11 Lock Lock state
12 Shield
Shielding state (buttons, temperature, on/off, mode or save is shielded by
long-distance monitoring
13 Turbo Turbo function state
14 Memory
Memory state (Indoor unit resumes original setting state after power failure and
then power recovery)
15 Twinkle Flicking when unit is on without operation of buttons
16 Save Energy-saving state
17 Temperature Ambient/setting temperature value
18
E-Heater＊
E-HEATER display means electric-heater is available
19 Blow Blow mark
20 Timer Timer-displayed location
21 Quiet Quiet state(two types: quiet and auto quiet)
Notes: The functions with * are reserved for other models and are not applicable for the models listed in this manual.
Table 3.1
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.2 Buttons
3.2.1 Silk Screen of Buttons
Fig. 3.3Silk screen of buttons
3.2.2 Instruction to Function of Buttons
No. Description Function of Button
1
Enter/cancel
(1) Function selection and canceling;
(2) Press it for 5s to enquiry the outdoor ambient temperature.
2
▲
6 ▼
(1) Running temperature setting of indoor unit, range :16～30°C
(2) Timer setting, range:0.5-24hr
(3) Switchover between quiet/auto quiet
3
Fan Setting of high/middle/low/auto fan speed
4
Mode Setting of cooling/heating/fan/dry mode of indoor unit
5
Function Switchover among these functions of air/sleep/turbo/save/e-heater/blow/quite
7 Timer Timer setting
8
On/off Turn on/off indoor unit
4 Mode
and
2 ▲
Memory function
Press Mode and ▲for 5s under off state of the unit to enter/cancel key memory
function (If memory is set, indoor unit will resumer original setting state after
power failure and then power recovery. If not, indoor unit is defaulted to be off
after power recovery. Memory function is defaulted to be off before outgoing.)
2 ▲
and
6 ▼
Lock
Upon startup of the unit without malfunction or under off state of the unit, press ▲
▼ key at the same time for 5s in to lock state. In this case, any other buttons won’t
respond the press. Repress ▲ ▼ key for 5s to quit lock state.
4 Mode
and
5 Function
Enquiry and setting of
address of wired
controller
Under the off-state of the unit, press Mode/Function button for 5 seconds to set the
address.
5 Function
And
7Timer
Setting Ambient
Temperature Sensor
and three Grades of
Speed for Indoor Fan
Under off state of the unit, press Function and Timer buttons continuously for 5s
to go to the debugging menu. Press Mode button to adjust the setting items and ▲
or ▼ button to set the actual value.
5 Function
and
6▼
Enquiry of Historical
Errors
Continuously press Function and ▼ buttons for 5s to go to the enquiry state. In this
state, press Enter/Cancel button to quit, or it will automatically quit after there is
not any operation of button in 30min
Table 3.2
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.3 Installation of Wired Controller and Project Debugging
3.3.1 Installation of Wired Controller
Fig.3.4: Sketch for Installation of Wired Controller
No. 1 2 3 4 5
Description Socket’s base box
installed in the wall
Soleplate of
controller
Screw M4X25 Front panel of
controller
Screw ST2.2X6.5
Fig.3.4: Sketch for Installation of Wired Controller. Pay attention to the following items during installation
of wired controller:
1. Cut off power supply of heavy-current wire embedded in mounting hole in the wall before installation. It
is prohibited to perform the whole procedure with electricity.
2. Pull out 4-core twisted pair line in mounting hole and then make it through the rectangle hole at the back
of controller’s soleplate.
3. Joint the controller’s soleplate on wall face and then fix it in mounting hole with screws M4X25.
4. Insert the 4-core twisted pair line through rectangle hole into controller’s slot and buckle the front panel
and soleplate of controller together.
5. At last, fix the controller’s front panel and soleplate with screws ST2.2X6.5.
Caution:
During connection of wirings, pay special attention to the following items to avoid interference of
electromagnetism to unit and even failure of it.
1. To ensure normal communication of the unit, signal line and wiring (communication) of wired controller
should be separate from power cord and indoor/outdoor connection lines. The distance between them
should be kept 20cm in min.
2. If the unit is installed at the place where there is interference of electromagnetism, signal line and wiring
(communication) of wired controller must be shielded by twisted pair lines.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.3.2 Project Debugging
Enquiry of wired controller’s address: Press Function and Mode buttons at the same time for 5s under
off state of the unit, and then LCD displays wired controller’s address number.
Setting of wired controller’s address: Press Function and Mode buttons at the same time for 5s.In this
case, LCD displays address number. Then press ▲ or ▼ button to adjust address (address no.:1-16) .After
that, press Enter/cancel button to confirm.
Addresses of the wired controller are used for centralized control of wired controller. Enquiry and
setting of wired controller’s address is shown as Fig.3.5 below:
Fig.3.5: Enquiry and Setting of Wired Controller’s Address
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4 Instruction to Operation
3.4.1 On/Off
Press On/Off button to turn on the unit.
Repress this button to turn off the unit.
Note: The state shown in Fig.3.6 indicates off-state of the unit after energization.
The state shown in Fig.3.7indicates on-state of the unit after energization.
Fig.3.6 Off state of the unit Fig.3.7On state of the unit
3.4.2 Mode Setting
Under on-state of the unit, press Mode button to switch the operation modes as the following sequence:
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.3 Temperature Setting
Press ▲ or ▼ button to increase or decrease of setting temperature under on-state of the unit. If press
either of them continuously, temperature will be increased or decreased by 1°C every 0.5s.
In Cooling, Dry, Fan and Heating mode, temperature setting range is 16°C～30°C.
In Auto mode, the setting temperature is un-adjustable.
As shown in Fig3.8
Fig 3.8
3.4.4 Fan Speed Setting
Press Fan button, fan speed of indoor unit will change as below:
As shown in Fig.3.9
Fig.3.9
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.5 Swing Control Function＊
Under on-state of unit, press Function button till the unit enters swing control function and then press
“Enter/cancel “ button to turn on “swing” control function.
During swing function, press Function button till the unit enters swing control function and then press
Enter/cancel button to cancel swing control function.
Swing control function setting is shown in Fig 3.10
Fig.3.10
3.4.6 Timer Setting
Press Timer button to set timer off of the unit. Under off-state of the unit, press Timer button to set
timer on of the unit in the same way.
Timer on setting: Under off-state of the unit without timer setting, if Timer button is pressed, LCD
will display xx. Hour, with ON blinking. In this case, press▲ or ▼ button to adjust timer on and then press
Timer to confirm. If Mode button is pressed before pressing Timer button to confirm, timer mode will be
switched to timer off setting mode. In this case, LCD displays xx. Hour, with OFF blinking. In this case,
press▲ or ▼ button to adjust timer off and then press Timer to confirm. When LCD displays xx. Hour On
Off, xx. Hour means time of timer on, but time of timer off won’t be displayed.
Timer off setting: Under on-state of the unit without timer setting, if Timer button is pressed, LCD
will display xx. Hour, with OFF blinking. In this case, press▲ or ▼ button to adjust timer on and then
press Timer to confirm. If Mode button is pressed before pressing Timer button to confirm, timer mode
will be switched to timer on setting mode. In this case, LCD displays xx. Hour, with ON blinking. In this
case, press▲ or ▼ button to adjust timer on and then press Timer button to confirm. When LCD displays
xx. Hour On Off, xx. Hour means time of timer off, but time of timer on won’t be displayed.
Cancel timer: After setting of timer, if Timer button is pressed, LCD won’t display xx. Hour so that
timer setting is canceled.
Timer off setting under on-state of the unit is shown as Fig.3.11
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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Fig. 3.11Timer setting under on state of the unit
Timer range: 0.5-24hr. Every press of▲ or ▼ button will make setting time increased or decreased by
0.5hr.If press either of them continuously, setting time will automatically increase/ decrease by 0.5hr every
0.5s.
Note:
1. If both timer on and timer off are set in unit on interface, the wired controller only display time of time off. If both of them
are set in unit off-state, only time of timer on is displayed.
2. Timer on in unit on-state is timed from the time of unit off and timer off in unit off-state is timed from the time of unit on.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.7 Air Exchange Setting＊
Turn on air Exchange function:
Under on-state of the unit, press Function button to go to the this function setting (Air mark
blinks).AIR 1 displayed at the ambient temperature-displayed location (888) is defaulted (the last type of
AIR will be displayed after adjustment).Press ▲ or ▼ button to adjust air type. Press Enter/Cancel button
to turn on/off air function. After turning on this function, the air mark shows.
There are 10 types of AIR, but only 1-2 types are for remote control. Refer to the following details:
1――The unit continuously runs for 60min, and fresh air valve runs for 6 min.
2――The unit continuously runs for 60min, and fresh air valve runs for 12 min.
3――The unit continuously runs for 60min, and fresh air valve runs for 18 min.
4――The unit continuously runs for 60min, and fresh air valve runs for 2 4 min.
5――The unit continuously runs for 60min, and fresh air valve runs for 30 min.
6――The unit continuously runs for 60min, and fresh air valve runs for 36 min.
7――The unit continuously runs for 60min, and fresh air valve runs for 42 min.
8――The unit continuously runs for 60min, and fresh air valve runs for 48 min.
9――The unit continuously runs for 60min, and fresh air valve runs for 54 min.
10――The unit continuously runs for 60min, and fresh air valve always runs.
Turn off air Exchange function: During Air function, press Function button to go to the Air function.
In this case, air mark is blinking, and then press Enter/cancel button to turn off this function. Air mark will
subsequently disappear.
Air Exchange setting is shown as in fig.3.12
Fig.3.12 Air exchange device
Note:
In air exchange mode, press Function button or there is not any operation within 5s after the last button operation, the
system will be quit from air exchange setting and current energy-saving data won’t be memorized.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.8 Sleep Setting
Sleep on: Press Function button under on-state of the unit into sleep function and then press
Enter/cancel button to turn on sleeping function.
Sleep off: During sleep on-state, press Function button to go to the sleep function and then press
Enter/cancel button to turn off this function.
Sleep setting is shown as Fig3.13:
Fig.3.13 Sleep setting
Sleep setting is clear after power failure and then power recovery. There is not sleep function in fan
and auto mode.
Note: In cooling and dry mode, if the unit with sleep function has run for 1 hour, the preset temperature will be increased by
1°C and 1°C in another 1 hour. After that, the unit will run at this temperature. In heating mode, if the unit with sleep function
has run for 1 hour, the preset temperature will be decreased by 1°C and 1°C in another 1 hour. After that, the unit will run at
this temperature.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
36
3.4.9 Turbo Function Setting
TURBO function: The unit at high fun speed can realize quick cooling or heating so that room
temperature can quickly approach setting temperature.
In cooling or heating mode, press Function button till the unit enters TURBO function and then press
Enter/cancel button to turn on TURBO function.
During TURBO function, press Function button till the unit enters TURBO function and then press
Enter/cancel button to cancel TURBO function.
TURBO function setting is shown in Fig3.14:
Fig.3.14Turbo Function Setting
Note:
1. TURBO function will b
e turned off after power failure and then recovery. In dry, fan and auto mode, TURBO function
can not be set and TURBO mark won’t be displayed.
2. TURBO function will be automatically canceled after setting of quiet function.
3.4.10 SAVE Function Setting
Energy Saving Function: Energy saving can make the air conditioner runs in a smaller temperature
range by setting lower limited value of setting temperature in cooling or dry mode and upper limited value
in heating mode.
1. Energy Saving Setting for Cooling
Under on-state and in cooling or dry mode of the unit, press Function button into energy saving
function, with SAVE blinking .Press ▲ or ▼ button to adjust lower limited value of setting temperature in
cooing mode. After that press Enter/Cancel button to turn on energy saving function for cooling.
2. Energy Saving Setting for Heating
Under on state and in heating mode of the unit, press Function button into energy saving function,
with SAVE blinking. Press Mode button into energy saving function for heating and then press▲ or ▼
button to adjust upper limited value of setting temperature in heating mode. After that, press Enter/Cancel
button to turn on energy saving function for heating.
After energy saving function is turned on, press Function button into energy saving function and press
Enter/cancel to cancel this function.
The energy saving setting is shown in the fig.3.15.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
37
Fig.3.15Energy Saving Setting
Note:
1. In Auto running mode with save function on, the unit will be forcibly quit Auto running Mode and change to current
operation mode, After setting of save, sleep function will be canceled.
2. In save mode, if Function button is pressed or there is not any operation within 5s after the last button operation, the
system will be quit from save function setting and current data won’t be memorized.
3. After power failure and then recovery, save function setting will be memorized.
4. The lower limited value in cooling mode is 16°C and the upper limited value in heating mode is 30°C.
5. After save setting, if the setting temperature is out of the range in the mode, the limited value will prevail.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.11 E-HEATER Setting＊
E-HEATER: In the heating mode, E-heater is allowed to be turned on for improvement of efficiency.
If heating mode is turned on by button operation, auxiliary electric heating function will be
automatically turned on.
Press Function button in heating mode to go to the auxiliary electric heating function, the
E-HEATER blinking, and press Enter/cancel button to turn on this function. In this case, the E-HEATER
will be displayed, which means E-heater is allowed to be turned on.
If auxiliary electric heating function is on, press Function button to confirm or press Enter/cancel
button to cancel. In this case, E-HEATER won’t be displayed, which means E-heater is prohibited to be
turned on.
The setting of this function is shown as Fig3.16 below:
Fig. 3.16 Auxiliary Electric Heating Function Setting
Note:
E-HEATER can
not be set in cooling, dry and fan mode, E-HEATER mark won’t be displayed. The setting is shown in
Fig.3.16.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.12 Blow Function Setting
BLOW function: After the unit is turned off, water in evaporator of indoor unit will be automatically
evaporated to avoid mildew.
In cooling and dry mode, press Function button till the unit enters BLOW function, with BLOW
blinking, and then press Enter/cancel button to turn on this function.
In BLOW mode, press Function button till the unit enters BLOW function and then press
Enter/cancel button to cancel this function.
BLOW function setting is shown in Fig3.17
Fig. 3.17 Blow function setting
Note:
1. After setting BLOW function, turn off the unit by pressing On/Off button on remote controller, indoor fan will run at
low fan speed for 10 min. (BLOW shows).Meanwhile, if BLOW function is canceled indoor fan will be turned off
directly.
2. There is not BLOW function in fan or heating mode.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.13 Quiet Function Setting
Quiet function consists of two kinds: QUIET and AUTO QUIET.
Press Function button till the unit enters quiet function setting state, Quiet or Auto Quiet mark blinks.
In this case, press▲ or ▼ button to switch between Quiet and Auto Quiet and then press Enter/cancel
button to turn on this function.
In quiet mode, press Function button till the unit enters quiet function. In this case, Quiet or Auto
Quiet icon blinks and then press Enter/cancel button to cancel this function.
Quiet function setting is shown in Fig3.18
Fig. 3.18 Quiet function setting
Note:
1. During quiet function, fan speed is un-adjustable.
2. When turning on auto quiet function, the unit will enter quiet running state according to temperature difference between
room temperature and setting temperature. In this case, fan speed is adjustable. If temperature difference between room
temperature and setting temperature ≥ 4°C, fan will keep its current speed; if 2°C≤temperature difference ≤3℃; fan
speed will be reduced by one grade ,but if it is at minimun. grade, it is un-adjustable.; if temperature difference ≤1°C,
fan speed will be at minimun grade
3. In auto quiet mode, fan speed can not be raised but reduced. If high fan speed is manually adjusted, auto quiet mode
will quit.
4. There is not auto quiet function in fan or dry mode. Quiet off is default after power failure and then power recovery.
5. If quite function is set, turbo function will be canceled.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
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3.4.14 Field Functions
Under off-state of the unit, press Function and Timer buttons continuously for 5s to go to the
debugging menu. Press Mode button to adjust the setting items and ▲ or ▼ button to set the actual value.
3.4.14.1 Ambient Temperature Sensor Setting
In field setting mode, press Mode button to adjust the temperature displayed location displaying 00,
and press ▲ or ▼ button to adjust setting state at timer displayed location. There are 3 types for selection:
1) Indoor ambient temperature is that at return air inlet (01 is displayed at timer displayed location)
2) Indoor ambient temperature is that at the place of screen (02 is displayed at timer displayed location)
3) Return air inlet temperature sensor shall be selected for cooling, dry and fan modes and wired
controller temperature sensor (03 is displayed at timer displayed location) shall be selected for heating
and auto modes.
3.4.14.2 Three Grades of Speed for Indoor Fan
In field setting mode, press Mode button to adjust the temperature displayed location displaying 01
and press ▲ or ▼ button to adjust setting state at timer displayed location. There are 2 types for selection:
1) 3 low grades (LCD displays 01)
2) 3 high grades (LCD displays 02)
Three low grades indicate high, medium and low grades and 3 high grades indicate super-high, high
and medium grades.
Press Enter/Cancel button to save the setting and quit after setting. If there is not any operation within
20s after the system responds to the last button operation in this interface, the system will quit this menu
and display normal off-state; meanwhile, current setting won’t be saved.
3.4.15 Other Functions
3.4.15.1 Lock Function
Upon startup of the unit without malfunction or under off-state of the unit, press ▲ and ▼buttons at
the same time for 5s till the wired controller enters lock state. In this case, LCD displays
.
After that,
repress these two buttons at the same time for 5s to quit lock state.
Under lock state, any other buttons won’t give any response to the press.
3.4.15.2 Memory Function
Memory switchover: Under off-state of the unit, press Mode and ▲ buttons at the same time for 5s to
switch memory modes. During setting memory mode, Memory will be displayed. If this function is not set,
the unit will be under off state after power failure and then power recovery.
Memory recovery: If memory mode has been set for wired controller, the wired controller after power
failure will resume its original running state upon power recovery.
Note:
It will take about 5 seconds to save all the information, therefore, please do not cut down the power at this time, or it may
fails.
3.4.15.3 Enquiry of Outdoor Ambient Temperature
Under on or off state of the unit, press Enter/Cancel button for 5s, outdoor ambient temperature will
be displayed at temperature displaying location after a sound of click. This enquiry state will quit by
pressing any button. If there is not any operation for 20s, it will automatically quit.
Note:
1. This function will be shielded after energization of 12hr for some models of the units without outdoor ambient sensors.
Please refer to Instruction for details.
2. If malfunction of outdoor ambient sensor occurs, this function will be shielded in 12hr.
3.4.15.4 Enquiry of Historical Errors
Continuously press Function and ▼ buttons without lock for 5s into enquiry state. In this state, press
Enter/Cancel button to quit, or it will automatically quit after there is not any operation of button in 30min.
In enquiry state, press Mode button to adjust temperature displayed location displaying 00-04 and press ▲
or ▼ button to make timer displayed location display error code. If 2E1 is displayed in timer displayed
location, it means high pressure protection of the system 2.
3.4.15.5 Selection of Centigrade and Fahrenheit
Under off-state of the unit, press Mode and ▼ at the same time for 5s, the displayer panel will switch
between Centigrade and Fahrenheit.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
42
3.5 Error Display
If there is malfunction during running of the system, LCD will display error code at
temperature–displayed location. Once there is more than one malfunction, error codes will be displayed
circularly. If there are multiple circuit systems, the system number of failed system will be displayed before
the colon (not for single system).
If malfunction occurs, turn off the unit and contact nearest dealer for help.
As shown in Fig.3.19 it means high pressure protection of system 2 under unit on.
Fig.3.19
Error code meaning:
Error code Malfunction
E1
High pressure protection of compressor
E2 Indoor anti-freezing protection
E3
Low pressure protection of compressor
E4
High discharge temperature protection of compressor
E5
Compressor overload protection
E6
Communication malfunction
E9
Water overflow protection
F0 Indoor unit ambient sensor malfunction at air return opening
F1 Evaporator sensor malfunction
F2 Condenser sensor malfunction
F3 Outdoor unit ambient temperature sensor mal
F4 Discharge temperature sensor malfunction
F5 Ambient sensor malfunction on Displayer (or LED board)
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
43
3.6 Setting of Indoor Room Sensor and Checking of Outdoor Ambient Temperature
3.6.1 Setting of Double Indoor Room Sensors
This series of ducted air-conditioning unit has two indoor room sensors. One is located at the air intake
of the indoor unit and the other one is located inside the wired controller.
User can select one from the two indoor room sensors on the basis of the engineering
requirement.(Refer to the section of wire controller instructions for detailed operation.)
Fig3.20
3.6.2 Checking of Outdoor Ambient Temperature
The outdoor ambient temperature can be checked on the wire controller for the convenience of users
without going out. (Refer to the section of wire controller instructions for detailed operation.)
Fig3.21
Outdoor unit
Indoor unit
Outdoor
Room
S
ensor
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
44
3.6.3 Fresh Air Control＊
11-level control can be realized for the amount of fresh air taken in. The function not only facilitates
the health of users, but also controls the electricity consumption loss due to taking fresh air in. This kind of
control can be carried out through the wired controller. The function can be set and go into effect at any
time,
and features very simple operation. (Refer to the section of wired controller instructions for detailed
operation.)
Fig 3.22
3.6.4 Position and Method of Installing Wired Remote Controller
One end of the control wire of the wired remote controller is connected to main board in the electric
box of indoor unit, it should be tightened by wire clamps, while the other end should be connected to the
wired controller. The special control wire be used between the indoor unit and wired remote controller, of
which the length is 8 meters.
The material to be adopted for the control wire should be metallic substance. The wired controller
could not be disassembled and the control wire to be used for the wired controller should not be changed by
users optionally. The installation and maintenance should be carried out by the installer.
Firstly select an installation position. According to the size of the control wire for the wired remote
controller, leave a recess or a embedded wire hole to bury the communication line.
If the control wire between the wired remote controller and the indoor unit is surface-mounted, use 1#
metallic pipe and make matching recess in the wall (refer to Figure 3.23); If concealed installation is
adopted, 1# metallic pipe can be used (Refer to Figure 3.24.
No matter if surface mounting or concealed mounting is selected, it is required to drill 2 holes (in the
same level) between which the distance shall be the same as the distance (60mm) of installation holes in the
bottom plate of the wired controller. Then insert a wood plug into each hole, fix the bottom plate of the wire
controller to the way through these two holes, plug the control wire onto the control panel, and lastly install
the panel of the wire controller.( Refer to Figure 3.3.1)
Fig.3.23 Fig.3.24
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
45
Caution:
During the installation of the bottom plate of the wired controller, pay attention to the direction of the
bottom plate. The plate’s side with two notches must be at the lower position, otherwise the panel of the
wired controller cannot be correctly installed.
Caution:
1. The communication distance between the main board and the wired controller can be as far as 20m (The
standard distance is 8m).
2.The wired controller shall not be installed in a place where there is water drop or large amount of water
vapor.
4 Wireless Remote Controller
Notes: This remote control is universal .It could be used for many units. Some buttons such as are not
available in this unit will not be described below.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
46
1. “ON/OFF” button
After powering the unit, when the unit is off state, press the “ON/OFF” button to start the unit. AND
when the unit is on state, press the button ,it will be off.
2. “Mode” button
Press this button , the unit will be run in the mode which you want. Press this button once, the mode
will be changed in a regular as AUTO –COOL –DRY –FAN – HEAT.
AUTO； COOL； DRY； FAN ； HEAT
3.“+” .“–” button
Press the “+” or “–” button to set your desired temperature. The temperature range is from 16 to ℃
30 .It is not necessary at AUTO mode. AND when you are setting the℃ timing hours, press the “+” or “–”
button once, the timing hours will increase or decrease 0.5 hour.
4.“FAN” button
Press the “FAN” button to set fan speed. The AUTO FAN .LOW.MID.HIGH could be selected.
5.
button
There is no this function for this unit. If press this key, the main unit will click, but it also runs under
original status.
6. “SLEEP” button
Press this button to set the sleep mode. Once the sleep mode is set , the temperature will increase 1 ℃
after 1 hour, and still increase another 1 after 2 hours in the COOL mode. While in HEAT mode , the ℃
temperature will decrease 1 after 1 hour, and still℃ decrease another 1 after 2 hours .℃
7. “TIMER” button
Press the button to set the timing function. When the timing function is on, press this button to cancel
the function. When the timing function is off, press this button once, words Hour on(off) will appear and
flicker. In this case, press +/- button to adjust time (press +/- button continuously to change timing value
quickly),the setting time range is from 0.5 to 24 hr; press this key once again to fix the time, then remote
controller will send out the signal immediately and hour on/off will stop flickering. If the time of that no
press timer button under flicking status is above 5s, the timer setting will quit. If the timer has been set,
press this button once again to quit it.
8. “TURBO” button
Set turbo on or off(the characters of turbo will appear of disappear) by pressing this key under cooling
or heating mode. Once energized, the unit will be defaulted to be turbo off. This function can not be set
under auto, dehumidify or fan mode, and characters of turbo won’t appear.
9. “BLOW” button
Set Blow on or off (the characters of Blow will appear of disappear) by pressing this key under
cooling or dehumidify mode. Once energized, the unit will be defaulted to be Blow off. Set E-Heater on or
off (the characters of E-Heater will appear of disappear) by pressing this key under heat mode. Once
energized, the unit will be defaulted to be E-Heater off. Blow and E-Heater function can not be set under
auto or fan mode, and characters of Blow won’t appear.
10. “Light” button
There is no this function for this unit. If press this key, the main unit will click, but it also runs under
original status.
11. “Temp” button
There is no this function for this unit. If press this key, the main unit will click, but it also runs under
original status.
12. “HEALTH |SAVE” button
There is no this function for this unit. If press this key, the main unit will click, but it also runs under
original status.
About AUTO RUN ：
When AUTO RUN mode is selected, the setting temperature will not be displayed on the LCD .The
unit will be accordance with the room temp, automatically to select the suitable running mode and to make
ambient comfortable.
About turbo function
If start this function, the unit will run at super-high speed to cool or heat quickly so that the ambient
temp approachs the preset temp as soon as possible.
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
47
About LOCK：
Press “+” and “–” simultaneously to lock or unlock the keyboard. If the remote control is locked,
the icon
will be displayed on the LCD, in which case, press any button , the mark will flicker for
three times. If the keyboard is unlocked, the mark will disappear.
About switch between Fahrenheit and Centigrade
Under status of unit off, press MODE and – buttons simultaneously to switch °C and °F
Changing batteries and notices：
1、 Slightly to press the place with
along
the arrowhead direction to push the back cover of
remote controller.(As show in Fig 4.1)
2、 Take out the old batteries ,insert two AAA
alkaline cells(As show in Fig 2.)
3.Attach the back cover of remote control.
NOTE:
1. When changing the batteries, do not use the old or different batteries, otherwise, it can cause the malfunction of the
wireless remote control.
2. If the wireless remote control will not be used for a long time, please take them out . and do not let the leakage liquid
damage the wireless remote control .
3. The operation should be in its receiving rang.
4. It should be placed where is 1m away from the TV set or stereo sound sets.
5. If the remote control cannot operate normally, please take the batteries out, and then reinsert it 30s later; if it is also
abnormal, please replace the batteries.
6. If the main unit needs to be remote controlled, please aim remote controller at the receiver of main unit in order to
improve the receiving sensitivity of the main unit.
7. When the remote controller sends out single, a make
will flicker for about 1s.The bell will ring if the main unit
receives effect signal.
5 Centralized Controller-week timer
5.1 Function
Centralized Control and Week Timer Functions: The centralized controller and the weekly timer are
integrated in the same wire controller. The system has both the centralized control and the week timing
functions. Up to 16 sets of units can be controlled simultaneously by the centralized controller (weekly
timer). The weekly timer has the function of invalidating the lower unit. The weekly timing function is able
to realized four timing ON/OFF periods for any unit every day, so as to achieve fully automatic operation.
No timing control can be set for holidays. On and off of every duct type unit can be done through the Timer
On / Off of this WEEKLY TIMER，it can not set other functions except on-off function of units.
Fig4.1
Fig4.2
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
48
5.2 Operation View
NO. Name Function description
1 ENTER button when “enter” is pressed the setting is validate.
2 Increasing button
Press “▲” and selected the unit or a certain day in one week or specific value. Press
“▲” can set week part of time.
3 Decreasing button
Press “
” and selected the unit or a certain day in one week or specific value. Press
“
” can set week part of time.
4
CANCEL/DELETE
Button
short-press “cancel/delete” to back to default page or last process, long-press
“cancel/delete” to cancel timer of a certain time period in a certain day
5
SINGLLE/GROUP
Button
short-press “single/group” to enter single control setting. “SINGLE” displayed.
long-press “single/group” to enter group control setting. “GROUP” displayed
6
TIMER/TIME
Button
Short-press “timer/time” to enter timer setting.
Long-press “timer/time” under default page can begin time setting.
7 On/off button Control unit run or stop
8 LCD display Display unit information
5.3 Display View
DUCT TYPE SPLIT AIR CONDITIONER CONTROL
49
NO. Name Function description
1 unit’s no. displays Display unit’s numbers
2 Group control displays when group controls, it will display
3 Single control displays when single unit controls, it will display
4 Timer time in week displays Display time in week
5 Timer displays Display time
6 timer state displays
“on”: when set unit on, “on” will display;
“off”: when set unit off, “off” will display;
7 timer on time displays Display starts time
8 on control displays When set unit or group on, it will display,
9 off control displays When set unit or group off, it will display,
10 present time in week display Display present time of week.
11 present time in Hr:Min displays Display time of hour and minute now
12 timer off time displays Display over time
13 timer period displays Set to different time segment
Note：Please read corresponding manual of weekly timer controller to be familiar with it.
5.4 Dimensions
VESSER COMMERCIAL AIR CONDITIONER
DUCT TYPE SPLIT AIR CONDITIONER
INSTALLATION
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
51
1 INDOOR UNIT INSTALLATION
1.1 Before Installation
1. The preparation of all pipes (connecting pipes and drainage pipes) and cables (connecting lines of
wired controller, indoor unit and outdoor unit) must be ready before the installation, so as to achieve
smooth installation.
2. Drill an opening on the ceiling. Maybe it is required to support the ceiling to ensure the evenness of it
and avoid the vibration of it. Consult with the user or a construction company for details.
3. In case the strength of ceiling is not enough, use angle iron sections to set up a beam support. Place the
unit at the beam and fix it.
1.2 Installation Site
1. Ensure the top hanging piece has strong strength to withstand the weight of the unit.
2. The drainage pipe has convenient flow of water.
3. There is no obstacle blocking the air intake and exhaust outlet, so as to ensure sound air circulation.
4. The installation spaces required by the drawing must be ensured, so as to provide enough space for the
service and maintenance.
5. The installation site must be far away from heat source, leakage of inflammable gas or smoke.
6. The indoor unit is of ceiling mount (indoor unit is hidden inside the ceiling).
1.3 Dimension Data
Unit：mm
Models a b c d e f
GU68N3
1463 632 992 1150 192 343
1560 910 332 1194 292 342
GU136N3
1560 910 1194 1194 292 342
GU85N3
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
52
b
d
a
f
e
c
Unit：mm
Models a b c d e f
DGU136N3
1780 1040 868 1450 347 555
1.4 Installation Clearance Data
Air supply
Air retu rn
Suspender
Hook
Flat
washer
Spring
washer
Nut
installation of suspender
>1000
>1,000
>560
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
53
1.5 Drain Piping Work
A
B
For easy drainage of the condensation water, It should be installed with a downward gradient. To avoid
ployed as shown above and the height of the water seal could be determined by the pressure of the drain
hose.
Drain hose is in negative pressure state: A = B≥P/10+20 (mm)
Drain hose is in positive pressure state: A≥30mm，B≥P/10+20 (mm)
2 OUTDOOR UNIT INSTALLATION
2.1 Before Installation
1. After receipt of the unit, please check the unit for damage during transport. If there is external or
internal damage, please notify the company by written form.
2. After receipt of the unit, check and inspect the unit and accessories according to package list for
models, damage of unit body and specification and quantity of accessories.
3. Confirm conveying route and method of the unit to avoid damage to the unit and possible injuries. For
protection and safety of the unit, it is recommended to convey the unit together with the packing
container, even in special conditions.
4. Check the installation foundation for firmness. If the unit is installed on the metal place, ensure
electric insulation and conformability to relative criteria.
5. Ensure installation site away from the storage area with inflammable and explosive materials to avoid
explosion or fire.
2.2 Installation Site
1. Outdoor unit should be installed in a steady and stable place.
2. To reduce the length of the refrigerant pipe and bend number, make sure the indoor unit and outdoor
unit be close to each other.
3. Ensure the operation noise do not disturb neighbors and passerby.
4. Do not install the unit where it will be exposed to direct sunlight or other radiation heat source, or the
awning or a rainproof cloth should be utilized.
5. The inlet and outlet port should not be blocked.
6. Make sure the well air circulation.
7. Selection a location that is far away from combustible or explosive material, dust, fog or moist.
Don’t connect any air leading duct to the outdoor unit, at neither the air inlet nor the air outlet. The
outdoor unit will drop condensate while running at heat mode. If the temp is minus, it will form ice. Don’t
let the rain proof interfere the ventilation of outdoor unit.
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
54
2.3 Dimension Data
Model A B C
GU68N3
1150 460 1350
Model A B C
GU8
5N3 1150 422 1600
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
55
1772
A
880
840
C±2
B±2
844±2
Fig 27 Schematic of the Outdoor unit
Model A B C
GU102N3
990 787 387
GU136N3
1290 1160 850
Table.3 Outlines and dimension of the unit
Note：Unit: mm
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
56
2.4 Installation Clearance Data
>1200
>1000
>1000
>1000
>3000
>300
>300 >300
3 REFRIGERATION PIPING WORK
3.1 Refrigeration Piping Work Procedures
1. Align the flared end of the copper pipe with the center of the thread joint. Manually tighten the flared
end nut.
2. Use torque spanner to tighten the flared end nut until the spanner clatters.
Side with Electrical Box
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
57
3.2 Caution in Connecting Pipes
1. The connection of the pipes should confirm to the following principles:
2. Make sure to
lessen the length of connecting pipe, the height difference between the indoor and
outdoor unit, and the number of bends, and enlarge the diameter of bends.
The permitted maximum value of each case:
Height difference between the indoor and outdoor unit
＜30M
900 Number of bends
＜12
Length of connecting pipes
＜50M
3. The pipe meld type could be employed for the connection of the pipes between the indoor and outdoor
units.
4. The pipe joint should be tightly connected when a pipe joint is employed between two pipes. It is
better to use only one connecting pipe if the distance is not far.
5. The pipes should not be shriveled when the pipes are connecting. The bend diameter should be longer
than 200 millimeter. The connecting pipes should not be extended or curved frequently and the
curving process should not be larger than 3 times in the same bending position.
3.3 Specification of Connection Pipe
External
Diameter
Model
Gas
Pipe
(Inch)
Liquid
Pipe
(Inch)
Maximum Length
of Connection
Pipe
(m)
Maximum
Difference in Height
between Outdoor
and Indoor Unit (m)
Max.No. of
elbows. (90
o
)
Additional
Charge of
Refrigerant
(g/m)
GU68N3
DGU68HN
3/4″ 3/8″
50
30 12 60
GU85N3
DGU85HN
1″ 3/8″ 50
30
12 60
GU102N3
DGU102HN
9/8″ 1/2″
50
30
12 120
GU136N3
DGU136HN
9/8″ 5/8″
50
30
12 170
4 ELECTRIC WIRING WORK
4.1 Wiring Principle
All of the supplied components, material, and electric operation should be accorded with the local
principles.
1. The power supply should adopt the rated voltage and special circuit for the ducted air-conditioning
unit.
2. About the electric working, please refer to the “circuit diagram” adhering to the unit.
3. All the connection of the circuit should be carried out by the qualified electrician.
4. A circuit breaker that can cut all the power supply of the system should be installed. Wiring diagram of
the ducted air-conditioning unit is shown in Fig. 32.
5. The units should be well earthing to the ground by professionals.
6. Install a central switch which can cut all the power switch and air switch of the system.
7. The air switch should have hot and magnetic auto-turn-off function to protect the system from
overloading or short power.
8. Please accord to electrical diagram on the unit when connecting the wires.
Open indoor electric box and outdoor electric box respectively and put the wires cross the electric
boxes. Please choose the specification of the power cables according to the power capacity and the
installation conditions of the unit. Fix the wires with wire clamp and assemble the electric cover after
Note:Do not loosen the cap of the pipes when connecting the pipes between the indoor unit and the
outdoor unit. Connecting the pipes as soon as possible after loosening the cap of the pipes to avoid the
entering of water and dust. A metal pipe should be utilized if a pipe should be installed through a wall.
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
58
confirmation.
The wiring schematic of the outdoor and indoor unit, please refer to inferior Fig, while the power cord
standard and air-switch type, please refer to recommending table.
4.2 Electric Wiring Design
GU68N3
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
59
GU102N3
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
60
GU85N3 , GU136N3
DUCT TYPE SPLIT AIR CONDITIONER INSTALLATION
61
4.3 Specification of Power Supply Wire and Air Switch
Model Power Supply
Air Switch
(A)
Earthing
section(mm
2
)
Permit Min
section (mm2)
DGU68HN
380-415V 3N~ 50Hz 10 H05VV-F 1.5 H05VV-F 1.5
DGU85HN
380-415V 3N~ 50Hz 10 H05VV-F 1.5 H05VV-F 1.5
DGU102HN
380-415V 3N~ 50Hz 10 H05VV-F 1.5 H05VV-F 1.5
DGU136HN
380-415V 3N~ 50Hz 10 H05VV-F 1.5 H05VV-F 1.5
GU68N3
380-415V 3N~ 50Hz 25 H05RN-F 4.0 H05RN-F 4.0
GU85N3
380-415V 3N~ 50Hz 32 H05RN-F 6.0 H05RN-F 6.0
GU1
02N3 380-415V 3N~ 50Hz 40 H05RN-F 10.0 H05RN-F 10.0
GU1
36N3 380-415V 3N~ 50Hz 40 H05RN-F 10.0 H05RN-F 10.0
VESSER COMMERCIAL AIR CONDITIONER
DUCT TYPE SPLIT AIR CONDITIONER
MAINTENANCE
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
63
1 TROUBLE T ABLE
Trouble
Code
Trouble Name
Origin of
Trouble Signal
Control Description
E1
Compressor High
Pressure Protection
High Pressure
Switch
When high pressure protection has been detected in
continuously 3 seconds, shut off all loadings and shield all
buttons and remote control signals. LED blinks and displays
E1. The unit cannot recover automatically. Turn off the unit
by pressing ON/OFF, clearing “E1”and turning off the LED.
E3
Compressor low
pressure protection
Low pressure
switch
After 3min running of compressor, detect signal from low
pressure switch. If detect that low pressure switch is cut off
in continuously 30s, the complete unit will stop and display
“E3”while LED blinks. 3min later, if the error has cleared,
the complete unit resume running; If the low pressure switch
protection has been detected for 3 times during 30min, the
LED will blinks and displays “E3”. The unit cannot recover
automatically which requires pressing ON/OFF, and then
clear error code and turn off LED.
E4
Compressor discharge
temp. protection
Compressor
discharge
temp. sensor.
After the running of compressor, if detect that discharge
temp. is higher that 130 in continuously 30s, it is believed ℃
that there is high temp. protection of discharge pipes of
compressor. Turn off compressor, external fan and inner fan.
LED blinks and displays corresponding error code “E4”.
After 3min stop of compressor, if detect that the discharge
temp. is lower than 90 for continuously 5s, the compressor ℃
will resume running.
Since the first error detected, if detect that there is 3 times of
high temp. protection for compressor discharge pipes in
30min, turn off compressor, external fan and inner fan. LED
blinks and displays corresponding error code “E4”. The unit
cannot recover automatically which requires pressing
ON/OFF, and then clearing error code and turning off LED.
E5
Overloading
Protection of
Compressor
Overcurrent
Protector
If it is detected that overloading switch is cut off for
continuously 3 seconds, it is believed that compressor is in
the condition of overloading protection. Turn off compressor
and external fan and the LED blinks and displays the
corresponding error code E5.After 3 min stop of compressor,
if the error has disappeared, the compressor will restart.
From the first error detected, if overloading protection of
compressor has been detected in 3 times in 30 min, turn off
all loads (except for 4-way valve) and shield all buttons and
remote control signal except for ON/OFF button. Then LED
will blink and display the corresponding error code E5 and
the complete unit cannot be automatically recovered After
turning off the unit by press ON/OFF button, if the error
disappears, clear the error code and turn off the LED.
E6
Communication
malfunction
Ter mina l COM
After energization, if outdoor unit continuously shows that
there is not any feedback from indoor unit’s mainboard,
communication malfunction occurs. In this case, compressor
will be stop and E6 will be displayed. After that, outdoor fan
stops. If heating, the 4 way valve will stop after the compressor
stops for adequate time.
If the indoor unit hasn’t received information from
outdoor unit for a period of time, communication
malfunction occurs. In this case, indoor unit stop
(during heating, E-heater stopped firstly and the
indoor fan blows residual heat). If the display board
hasn’t received information from indoor unit for a
period of time, communication malfunction occurs. In
this case, malfunction code is displayed and the unit
won’t act.
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
64
E9 Indoor fan protection
Fan’s motor
switch or thermal
relay
After startup of indoor fan if overloading information of fan
b
reaks for a period of time, all loads will stops and E9 will be
displayed.
F0
Indoor ambient temp.
sensor error
Indoor ambient
temp. sensor
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (℃ open circuit with
corresponding temp about -45 ), it is believed that there is ℃
error of temp. sensor.
F1
Temp. sensor error of
indoor evaporator
Temp. sensor
of indoor
evaporator
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit with ℃
corresponding temp about-45 ), it is believed that there is ℃
error of temp. sensor.
F2
Tube sensor error
for outdoor
condensator
Tube sensor
for outdoor
condensator
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit with ℃
corresponding temp about -45 ), it is believed that there is ℃
error of temp. sensor.
F3
Outdoor ambient
temp. sensor error
Outdoor
ambient temp.
sensor
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit with ℃
corresponding temp about -45 ), it is believed that there is ℃
error of temp. sensor.
F4
Discharge temp.
sensor error
Discharge
temp. sensor
If detect that AD value exceeds 250(short circuit with
corresponding temp. 160 ) or less than 5 (open circuit with ℃
corresponding temp -45 ), it is believed that there is error ℃
of temp. sensor.
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
65
2 FLOW CHART OF TROUBLESHOOTING
2.1 High Pressure Protection
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
66
2.2 Low Pressure Protection
Compressor Low Pressure
Protection
Check if the swing blades of the indoor unit
are fully open?
Check if the fans for the indoor and outdoor
units are working?
check if the ventilation of the heat
exchangers for the indoor and outdoor units
works properly?
Check if the panel of the outdoor unit has
been sealed
check if the gas and liquid valves of the
outdoor unit are fully open?
check if the operational modes of the indoor
unit have been set correctly?
Check if the refrigeration capacity
of the system is too low?
Check if the filter and heat exchange fins of
the outdoor unit are dirty or clogged?
Check if the capacity output of the outdoor
unit meets with the required capacity of the
indoor unit?
Yes
No
Yes
Yes
Yes
Yes
Yes
No
Clear any obstacle
Cover the panel
Fully open the valve
refer to mode conflict
refer to capacity code
Check the swing motor and
the signal input
Check the fan motor
and the signal input
Yes
No
No
No
No
No
Yes
No
the system pipe is clogged
refer to maintenance
No
Yes
Add refrigerant by referring to the refrigerant
volume specified on the nameplate and the
refrigerant volume calculated on Page ??
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
67
2.3 Discharge protection
2.4 Overcurrent Protection
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
68
2.5 Communication Malfunction
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
69
2.6 Indoor Fan Overloading Protection
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
70
2.7 F0 Failure of Indoor Room Sensor at Air Intake
2.8 F1 Failure of Evaporator Temp. Sensor
2.9 Temperature sensor malfunction
F2 condenser temperature sensor malfunction
F3 outdoor temperature sensor malfunction
F4 discharge temperature sensor malfunction
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
71
3 WIRING DIADRAM
GU68N3
LL
DGU68HN
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
72
DGU85HN.
GU85N3
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
73
DG
U102HN
G
U102N3
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
74
D
GU136HN
G
U136N3
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
75
4 DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS
Introduction to Main Parts
Disassembly and Assembly of Compressor
Remark: Make sure that there isn’t any refrigerant in pipe system and the power supply is cut off before removal of the
compressor..
Step Illustration
Handling Instruction
1．Disconnect the power cord
①Unscrew the retaining screw of
power cord with screwdriver.
Unplug the power cord.②
Note:Earmark the colour of wire
corresponding to the terminal when
Removing the wire , and the
mixture can be avoided when
recovering the wire connection.
2. Cut off the connection between
compressor and pipes
Don’t leave the welding slag inside
pipes
3.Remove the compressor from the
chassis
Unscrew ret① aining nuts of the
footing of compressor
Remove the compressor from the②
chassis
Hold it tightly to avoid accident.
4.Fix the new compressor on
chassis
Place the new compressor on ①
chassis
Fix retaining nuts of comprssor②
footing.
5. Connect the compressor with
system pipes
Don’t block it by welding.
6.Connect the power cord of
compressor
Note:Earmark the colour of wire
corresponding to the terminal when
connecting the wire , and the
mixture can be avoided
7.Recover the electric heating tape
of compressor and discharge
temperature sensor,etc.
Enwind the bottom of compressor
with electric heating tape and fix it.
Earmark the
colour of
wire
correspondi
ng to the
terminal
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
76
8.Check if the compressor rotates
in reverse and if lubricant have
leaked
Check if the wiring is correct with
reference
to circuit diagram and
check if there is any leakage after
welding.
Disassembly and Assembly of 4-way valve
Remark: Make sure that there isn’t any refrigerant in pipe system and the power supply is cut off before removal of 4-way
valve.
Step Illustration
Handling Instruction
Remove electric coils of 4- way
valve
Place electric coils far away from
the 4-way valve to prevent the
connecting line of 4-way valve from
burning when succeeding welding.
Disconnect the pipe (site D in
illustration) of 4-way valve and
discharge pipe
Don’t leave welding slag inside
pipes.
Disconnect the pipe (site E in
illustration) of 4-way valve and
connecting pipe
Don’t leave welding slag inside
pipes.
Disconnect the pipe (site C in
illustration) of 4-valve and
connecting pipe
Don’t leave welding slag inside
pipes.
Disconnect the pipe (site S in
illustration) of 4-way valve and
connecting pipe
Don’t leave welding slag inside
pipes.
Remove the 4-way valve
Remove 4-way valve after it is
cooled.
Install new 4-way valve in reversed order and wrap it with wet cloth before welding.
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
77
5 EXPLODED VIEWS AND PART LIST
5.1 Indoor Unit
1.Model:DGU68Exploded View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
78
Parts List:
No. Names Material code Qty.
1
Bottom Cover Assy 01265357 1
2
Hook 02112466 4
3
Right Side Plate 1 01315378 1
4
airproof Panel 1 01345218 1
5
Water Tray Panel Assy 01285283 1
6
Evaporator Bottom side 01095271 1
7
Evaporator Assy 01025356 1
8
Seal of Connection Pipe Plate 01495241 1
9
Right Side Plate 2 01315370 1
10
Evaporator top side 01095270 1
11
Evaporator Back side 01095272 1
12
Top Cover Assy 01265359 1
13
air filter Panel 02285220 2
14
air filter 11725211 2
15
Left Side Plate 2 01315367 1
16
airproof Panel 2 01345219 1
17
Left Side Plate 1 01315376 1
18
Fan (left) SYP-250/190J-1 15705306 1
19
Motor FG1200A 15705229 1
20
Fan (right) SYP-250/190J-1 15705307 1
21
Motor support Plate 01805381 1
22
Fan Fixed Plate 01325325 1
23
Front Side Plate 01315373 1
24
temp.sensor (15K) 3900012123 1
25
temp.sensor (20K) 3900012121 1
26
Display board Z4E351A 30294219 1
27
Electric Box 01395679 1
28
Main PCB Z4E35A 30224056 1
29
Original PCB Mounting Plate Sub-Assy 01845221 1
30
AC Contactor LC1D12M7C 44010232 1
31
Terminal Board (5 unit) 42010194 1
32
Isolation Washer 70410503 2
33
Wire Clamp 71010102 1
34
Wire Clamp 02141009 1
35
Terminal Board (2 unit) 420101851 1
36
Transformer 54X25C 43110239 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
79
2
.Model:DG85HN Exploded View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
80
Parts List:
No. Names
Material code Qty.
1 Top Cover Sub-Assy 01265352 1
2 SupportSteelBar 01805367 1
3 rotate axletree 10549057 1
4 Fan Motor for indoor unit 1501861102 1
5 Motor Fixed Board 01845223 1
6 Belt Pulley 10548150 1
7 Taper Sleeve 10548213 1
8 Condenser assy and evaporator assy 01025344 1
9 Right Side Plate Sub-Assy 1 01315319 1
10 overhauling side 01545322 1
11 Belt SPA 76318341 2
12 Hook 02205302 4
13 Side beam sub-assy 01874179 1
14 Belt Pulley 10548156 1
15 Taper Sleeve 10548218 1
16 Right Side Plate 2 01315350 1
17 FrontPanel_OutsideMachine 01284142 1
18 MetalBase 01194136 1
19 Electric Box fixity 3 01749058 1
20 Electric Box fixity 2 01749057 1
21 Electric Box fixity 1 01749056 1
22 Electric Box 01394921 1
23 back girder 01875330 1
24 place with a draught of Connection board 1375225 2
25 Fan Motor Sub-assy 15705225 1
26 Left Side Plate Sub-Assy 1315383 1
27 front girder 01779106 1
28 Electric Fixed Plate 01339099 1
29 Main Board 30224217 1
30 Terminal Board 42011257 1
31 AC Contactor 44010232 1
32 Thermorelay 44020362 1
33 Wired controller 30294219 1
34 Transformer 43110239 1
35 Twin Pair Signal Cable 40010232 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
81
3. Model:DGU102HN Exploded View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
82
Parts List:
No. Names Material code Qty.
1 Top Cover 01259106 1
2 suspending rack 01729165 1
3 rotate axletree 10549057 1
4 Motor SW1500A 15018303 1
5 Fan Fixed Plate 01845309 1
6 measure staff 02169050 1
7 Hook 02139056 1
8 strap wheel 2-SPA112 10548152 1
9 cone sheath 1610-24 10548211 1
10 Evaporator Assy 01025208 1
11 Right Side Plate 01315319 1
12 overhauling side 01539148 1
13 strap 76318317 2
14 Hook 02205302 4
15 Side girder 01875301 1
16 strap wheel 2-SPA140 10548156 1
17 cone sheath 2012-25 10548218 1
18 Right Side Plate 01309105 1
19 temp.sensor (15K) 390001913 1
20 temp.sensor (20K) 3900020720 1
21 Water Tray 01285309 1
22 Metal Base 01285312 1
23 Display Board 30294219 1
24 Electric Box fixity1 01749056 1
25 Electric Box fixity2 01749057 1
26 Electric Box fixity3 01749058 1
27 cover of the Electric Box 01419141 1
28 Electric Box Sub-Assy 01399145 1
29 Terminal Board 42010194 1
30 Overcheater Protector 44020347 1
31 AC Contactor 44010232 1
32 Electric Fixed Plate 01325321 1
33 Transformer 54X25C 43110239 1
34 Main PCB Z4E35A 30224056 1
35 back girder 01779108 1
36 place with a draught of Connection board 1 01389077 1
37 place with a draught of Connection board 2 01389079 1
38 Fan SYT10-10L2 15009059 1
39 Right Side Plate 01315312 1
40 front girder 01779106 1
41 Filter Sub-Assy 11129070 2
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
83
4.Model:DGU136HN Exploded
View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
84
Parts List:
No. Names Product Code Qty.
1 Top Cover Sub-Assy 01265209 1
2 Retaining Plate Sub-Assy 01845205 1
3 Return Air Frame Sub-Assy 01375208P 2
4 Return Air Frame Sub-Assy 01875208P 2
5 Evaporator Assy 01025362 1
6 Retaining Plate Sub-Assy 01845207 1
7 Side Panel Sub-Assy 01545212 1
8 Side Panel Sub-Assy 01545210 1
9 Nut 70310116 6
10 Washer 70410309 6
11 Washer 70410312 4
12 Hook 02139056 1
13 Sheet Metal Piece 02169050 1
14 Retaining Plate 01845319 1
15 Fan Motor 15014805 1
16 rotate axletree 10549057 1
17 Water Collecting Tray Sub-Assy 01285220P 1
18 Belt SPA 76318309 2
19 Belt Pulley 10548149 1
20 Taper Sleeve 1610-28 10548213 1
21 Belt Pulley 10548155 1
22 Taper Sleeve 10548218 1
23 Sheet Metal Piece 01805212P 1
24 Base Plate Sub-Assy 01285222P 1
25 Electric Box Cover Plate 01425304P 1
26 Electric Box Sub-Assy 01395346 1
27 Air Outlet Frame 01375210P 2
28 Air Outlet Side Board 01375209P 2
29 Frame Plate Sub-Assy 01545213 1
30 Fan Motor Sub-assy 15705214 1
31 Side Panel Sub-Assy 01545208 1
32 Terminal Board 42011043 1
33 Main Board 30224217 1
34 Transformer 43110239 1
35 Thermal Overload Relay 44020362 1
36 AC contactor 44010232 1
37 Display Board 30294219 1
38 Twin Pair Signal Cable 4011014008 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
85
5.2 Outdoor Unit
1
. Model: GU68N3 Exploded View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
86
Parts List:
No. Names Material code Qty.
1 Compressor SH090A4ALB 00205243 1
2 eletricity calefaction strip 76515211 2
3 spring 73028761 2
4 Inhalation Tube Sub 04655491 1
5 Isolation Plate 01245248 1
6 Inhalation Tube Sub-Assy 04675410 1
7 4-way Valve Sub-Assy 04145324 1
8 electromagnetism loop 430004008 1
9 Chassis Sub-assy 01195239P 1
10 Valve Support 01715001 1
11 Gas-liquid Separator 07228767 1
12 Gas-liquid Separator nip 02264107 1
13 Back Side Plate Sub-Assy 01314207P 1
14 Handle 26235253 2
15 Top Cover 01258730 1
16 Electric Box Cover 01264157 1
17 Electric Box 01395676 1
18 Motor support Plate 01804174 1
19 Protection Grill 01574101 1
20 sponge 12204705 1
21 temp.sensor (20K) 390001923 1
22 temp.sensor (15K) 390002063 1
23 Condenser Sub-Assy 01125354 1
24 fixation Plate 01845227 1
25 Motor LW92E 15705701 2
26 Axial Flow Fan 10338701 2
27 Streamlined Dome 2 26904120 2
28 Grill 26904119 2
29 Left Side Plate 01314163P 1
30 Front Plate 01514101P 1
31 Front Side Plate 01314205P 1
32 temp.sensor (50K) 3900012129 1
33 Discharge Tube Sub-Assy 1 04635732 1
34 Discharge Tube Sub-Assy 04635409 1
35 Over Current Protector UO-10-16A/16A 46020103 1
36 Plastic nip 71011021 4
37 Main PCB ZS401D 30224211 1
38 Transformer SC28B2 43110171 1
39 Original PCB Mounting Plate Sub-Assy 01845323 1
40 Main PCB WZ4E35 30224058 1
41 Terminal Board (2 unit) 42011103 2
42 Capcaitor CBB61 4uF 500V 33010013 2
43 AC Contactor LC1D25M7C 44010213 1
44 Terminal Board T480C 42011043 1
45 Isolation Washer 70410503 2
46 Wire Clamp 71010102 1
47 Wire Clamp 02141009 1
48 Terminal Board (2 unit) 420101851 1
49
Phase Reverse Protector（380V）
46020052 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
87
2.
Model:GU85N3 Exploded View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
88
Part list
No. Names Material code Qty.
1 top cover 01258730 1
2 electric box cover 01424002 1
3 AC contactor 44010213 1
4 capacitance 33010013 1
5 over current protector 46020114 1
6 transformer 4311023302 1
7 terminal board 42011043 1
8 main board 30224309 1
9 electric box assy 01395796 1
10 main board 30224211 1
11 phase reverse protector 46020052 1
12 collecting gas pipe sub-assy 04675386 1
13 inhalation tube sub-assy 04675388 1
14 low pressure switch 460200157 1
15 connection pipe sub-assy 05025619 1
16 rear side plate sub-assy 01315359P 1
17 front side plate 01308730 1
18 rear side plate sub-assy 01315358P 1
19 4-way valve sub-assy 04145316 1
20 4-way valve 43000413 1
21 4-way valve fittings 4300040043 1
22 pressure protect switch 460200156 1
23 capillary sub-assy 04105332 1
24 collecting liquid pipe sub-assy 04325563 1
25 discharge tube sub-assy 04635380 1
26 pressure protect switch 4602001547 1
27 gas-liquid separator 07424141 1
28 cut-off valve 07130212 1
29 cut-off valve 07130209 1
30 valve support sub-assy 01715402 1
31 compressor 00205238 1
32 retaining plate sub-assy 01845224P 1
33 inhalation tube sub-assy 04675387 1
34 clapboard sub-assy 01245238 1
35 motor support sub-assy 01805368 1
36 axial flow fan 10338701 2
37 fan motor 15705701 2
38 base plate sub-assy 01195235P 1
39 condenser assy 01125336 1
40 motor support 01895233 1
41 front grill 26904119 2
42 front plate 01438707 1
43 reticulation plate 01575203 1
44 condenser support plate 01895232 1
45 wiring 4011014008 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
89
3.Model:GU102N3 Exploded
View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
90
Parts List:
No. Names Material code Qty.
1 Chassis Sub-assy 01195703P 1
2 4-way Valve Sub-Assy 04145336 1
3 Capillary Sub-Assy 04105219 1
4 Gas Valve Sub-Assy 07305208 1
5 Liquid Valve Sub-Assy 07305207 1
6 One way Valve NRV19S 07335210 1
7 Discharge Tube Sub-Assy 04635429 1
8 Compressor SH120A4ALB 00205213 1
9 Gas-liquid Separator 07425215 1
10 Inhalation Tube Sub-Assy 04675426 1
11 Right Side Plate 01318759 1
12 Front Grill 01238740 1
13 Condenser Sub-Assy 01125211 1
14 Rear Cover Plate 01258737 1
15 Back scaleboard 02225205P 1
16 Streamlined Dome 22265801 1
17 Axial Flow Fan 10355801 1
18 Motor Assy 15018761 1
19 Left Side Plate Sub-Assy 01314301P 1
20 Supporter1 01804632 1
21 Tube Clip 021400051 1
22 Filter Supporter 01729161 1
23 Supporter3 01804634 1
24
Supporting board（Electric Box）
01894602 1
25 Supporting Strip1 01894607 1
26 Supporting board3 01798797 2
27 support sub-assy1 01894605 1
28
Supporting Strip（Front Panel）
01798808 3
29 Front Panel1 01538736 1
30 Front Panel2 01538734 1
31 Electric Box Cover 01425319P 1
32 Main Board2 ZS501E 30225055 1
33
Terminal Board （2part）
42011103 1
34 Main Board WZ4E35 3022405 1
35 Transformer 48X26G 43110233 2
36
Phase Reverse Protector（380V）
46020052 1
37 Main Board1 ZS501 30225007 1
38 AC Contactor 44010214 1
39 Over Current Protector26.4A/UO-10-26 46020113 1
40 Terminal Board T480C 42011043 1
41 Original PCB Mounting Plate Sub-Assy 01325297 1
42 Electric Box 01425320 1
43 Base Frame Sub-Assy 01284609 1
44 Temp.Sensor (15K) 390002063 1
45 Temp.Sensor (20K) 390001923 1
46 Temp.Sensor (50K) 3900012129 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
91
4.Model:GU136N3 Exploded
View:
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
92
Parts List:
No. Names Product Code Qty.
1 Streamlined Dome 22265801 1
2 Top Cover Plate 01264110P 1
3 Rear Panel 01544104P 1
4 Rear Lining Board Sub-Assy 01264113P 1
5 Rear Strengthen Girder 01854102P 1
6 Rear isolation sheet 22414101 1
7 Fan Blade 10355801 1
8 Motor SW650A 15704601 1
9 Motor Assy 15404601 1
10 Condenser Assy 01125385 1
11 Right Side Plate 01315344P 1
12 Eletric box cover 1 01424108P 1
13 Electric Box Assy 01395818 1
14 AC Contactor 44010240 1
15 Terminal Board 42011103 1
16 Phase Reverse Protector 46020052 1
17 Main Board 30224309 1
18 Transformer 4311024001 1
19 Over current protector 46020121 1
20 Terminal Board 42011113 1
21 Terminal Board 42011051 1
22 Original PCB Mounting Plate Sub-Assy 01325334 1
23 Base Frame Sub-Assy 01285278 1
24 Handle 26235253 2
25 Front Panel 01544101P 1
26 Front Panel 01544102P 1
27 Front Panel 01544103P 1
28 Front Lining Board Sub-Assy 01264111P 1
29 Support plate 01894101P 1
30 Front vertical prop sub-assy 01854103P 1
31 Base Plate Sub-Assy 01285279P 1
32 Compressor 00205244 1
33 Valve Rack 01805399 1
34 Cut-off valve 07138799 1
35 Valve Rack 01805359 1
36 Cut-off valve 07130128 1
37 Rack 0180521501 3
38 Liquid by-pass sub-assy 04325634 1
39 4-way Valve Sub-Assy 04145346 1
40 Electric Expansion Valve Sub-Assy 07335265 1
41 Discharge Tube Sub-Assy 04635442 1
42 Oil Separator 07423202 1
43 Oil Return Tube Sub-Assy 04325746 1
44 Inhalation Tube Sub-Assy 04675434 1
45 Gas-liquid Separator 07424148 1
46 Electric expand valve fitting 43000110 1
47 Magnet Coil 4300008302 1
DUCT TYPE SPLIT AIR CONDITIONER MAINTENANCE
93
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