York YKHC 18 User manual

Cassette
YKHC 18 to 48
SERVICE MANUAL
YKHC 18 · YKHC 24 · YKHC 30 · YKHC 36 · YKHC 48
SM-YKHC-18-48GB 03-07

How to read the model?
Y K H C 24 F S B A A A
Range:
F = Floor standing
H = High wall
M = Master range
P = Portable
Y = YORK
R = Everest front
Refrigerant type:
A = R22
B = R407C
C = R410A
Capacity Btu/h
Generation:
A = First
R = New remote
Voltages:
A =
(Out) 220-240/1/50 - (In) 220-240/1/50
C = (Out) 380/3/50 - (In) 220-240/1/50
Indoor options:
A = Standard
J = Bio Screen filter
** Omit for outdoor units
Outdoor options:
A = Standard
B = Low Ambient Kit
C = Power outdoor
* Omit for indoor units
Indoors:
A = Free matching multi
S = Single
T = Duct High Static
U = Duct standard case
Compressor type:
A = AC Inverter
D = DC Inverter
F = Fixed
M = Multi
* * *
Family:
A = Efficiency Ultra
E = Eco Ultra
H = Alps
J = Atlas
K = Cassette
L = Ultra
M = Multi Ultra
R = Multi Inverter
V = Inverter Ultra
U = Ducted unit
O = Floor / Ceiling
Type:
C = Set - Cooling only
D = Outdoor - Cooling only
E = Indoor - Cooling only
H = Set - Heat pump
J = Outdoor Heat pump
K = Indoor Heat pump
M = Multi Ultra
R = Multi Inverter
V = Inverter Ultra
U = Ducted unit
O = Floor / Ceiling

1
Four-way Cassette Type
Part1. Product features
1) Low operation noise
---Streamline plate ensures quietness
---Creates natural and comfortable environment
2) Fresh air make life more healthy and comfortable.
3) Efficient cooling
---Equal, fast and wide—range cooling
Four-way airflow
4) The adoption of the most advanced 3- Dimensional Screw fan
---Reduces the air resistance passing through
---Smoothes the air flow
---Makes air speed distribution to the heat exchange uniform
3- Dimensional Screw fan
5) Improvement for easy installation and maintenance
---Little space is required for installation into a shallow ceiling
---Because of the compactness and weight reduction of the main unit and panel, all models can be installed
without a hoist

2
Part2. Specication
Model YKHC-18 YKHC-24
zH-V-hPylppusrewoP 1,220-240V,50Hz 1,220-240V,50Hz
Capacity Btu/h 2400018000
Capacity kW 7.15.3
WtupnI 25601900
AtnerrucdetaR 12.28.8
Cooling
h.W/utBREE 9.6 9.6
h/utByticapaC 2730020500
Capacity kW 8.06.0
WtupnI 25001900
AtnerrucdetaR 118.8
Heating
h.W/utBPOC 10.910.7
h/LlavomeRerutsioM 2.41.8
Wnoitpmusnoctupni.xaM 33002300
Atnerruc.xaM 15.311.7
AtnerrucgnitratS 6045
Model PA290X3CS-4MU1 C-SBN303H8D
Type ROTARY SCROLL
Brand TOSHIBA SANYO
Supplier TOSHIBA
(Guangdong) SANYO(Dalian)
h/utByticapaC 2457418362
WtupnI 24401855
A)ALR(tnerrucdetaR 11.48.6
Locked rotor Amp(LRA) A 8580
Thermal protector INNER INNER
FuroticapaC 50 50
Compressor
lmliotnaregirfeR 750 950
Model YDK45-4F YDK55-6
Brand WELING WELING
WtupnI 12063
FuroticapaC 3.52.5
Indoor fan motor
nim/r)ol/ih(deepS 680/600930/830
Number of rows 2 2
Tubepitch(a)x row pitch(b) mm 21 13.37 21 13.37
mmgnicapsniF 1.3 1.3
Fin type (code) Hydrophilic
aluminium
Hydrophilic
aluminium
Tube outside dia.and type mm Ø7, innergroove
tube
Ø7, innergroove
tube
Indoor coil
Coil length x height x width mm 210 26.71185 1950 126 26.74
m)oL/iH(wolfriaroodnI 3/h 1050/900860/760
)A(Bd)oL/iH(levelesionroodnI 43/40 43/40

3
Dimension (W*H*D)(body) mm 580 254 580 840 240 840
Packing (W*H*D)(body) mm 750 340 750 1020 330 930
Net/Gross weight(body) kg 21/30 36/46
Dimension (W*H*D)(panel) mm 650 30 650 950 40 950
Packing (W*H*D)(panel) mm 715 115 715 1030 145 1030
Indoor unit
Net/Gross weight(panel) kg 3/5 6/11
Model YDK53-6K YDK53-6H
Brand WELLING WELLING
Input W 130 130
Capacitor uF 2.5 3
Outdoor fan
motor
Speed r/min 750 800
Number of rows 2 2
Tube pitch(a)x row pitch(b) mm 25.4 22 25.4 22
Fin spacing mm 1.8 1.5
Fin type (code) Hydrophilic
aluminium
Hydrophilic
aluminium
Tube outside dia.and type mm Ø9.53,
innergroove tube
Ø9.53,
innergroove tube
Coil length x height x width mm 775 660 44 850 810 44
Outdoor coil
Number of circuits 3 4
mwolfriaroodtuO 3/h 2400 3000
Outdoor noise level dB(A) 48 55
Dimension(W*H*D) mm 845 695 335 895 860 330
Packing (W*H*D) mm 965 847 395 1000 985 410
Outdoor unit
Net/ Gross weight kg 55/58 79/90
Refrigerant type/Quantity g R410A/2050 R410A/2600
Design pressure (high side/low side) MPa 4.2/2.5 4.2/2.5
Liquid side mm(inch) 6.35 (1/4) 9.53 (3/8)
Gas side mm(inch) 12.7 (1/2) 16 (5/8)
Max. pipe length m 30 30
Refrigerant
piping
Max. dierence in level m20 20
Operation temp 17~30 17~30
Ambient temp -7~45 -7~45
Application area m234~49 40~56
Qty’per 20’& 40’Fcl Pieces 56/123/140 30/63/66
Notes: 1. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB;
2. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB;
3. Actual noise level may dier, depending on the room structure, etc, since these noise values are from an
anechoic room.

4
Model YKHC-30 YKHC-36 YKHC-48
Power supply Ph-V-Hz 3,380V,50Hz 3,380V,50Hz 3,380V,50Hz
Capacity
Btu/h 30000 36000 48000
Capacity
kW 8.8 10.5 14
Input W 3250 3700 4700
Rated current A 5.5 6.5 8.2
Cooling
EER Btu/W.h 9.3 9.6 9.6
Capacity Btu/h 32000 39000 52000
Capacity
kW 9.4 11.4 15.2
Input W 3250 3350 4900
Rated current A 5.5 5.8 8.6
Heating
COP Btu/W.h 10.9 11.5 10.6
MoistureRemoval L/h 3.0 3.0 4.8
Max. input consumption W 4620 4620 5870
Max.current A 8.5 8.5 10.7
Startingcurrent A 31 31 41
Model C-SBN303H8D C-SBN303H8D C-SBN373H8D
Type SCROLL SCROLL SCROLL
Brand SANYO SANYO SANYO
Supplier
SANYO(Dalian) SANYO(Dalian) SANYO(Dalian)
Capacity Btu/h 33500 33500 48123
Input W 3650 3650 4750
Rated current(RLA) A 6.58 6.58 8.22
Locked rotor Amp(LRA)
A 65 65 82
Thermal protector

INNER INNER INNER
Capacitor uF / / /
Compressor
Refrigerant oil ml 1700 1700 1700
Model

YDK56-6 YDK56-6 YDK56-6
Brand

WELLING WELLING WELLING
Input W 137 137 137
Capacitor uF 3 3 3
Indoor fan
motor
Speed(hi/lo) r/min 670/565 670/565 670/565
Number of rows

2 2 2
Tubepitch(a)x row pitch(b)
mm 2113.37 2113.37 2113.37
Finspacing mm 1.3 1.3 1.3
Fin type (code)

Hydrophilic
aluminium
Hydrophilic
aluminium
Hydrophilic
aluminium
Tube outside dia.and type
mm Ø7, innergroove
tube
Ø7, innergroove
tube
Ø7, innergroove
tube
Indoor coil
Coil length x height x width
mm 195016826.74 195016826.74 195016826.74
Indoor air flow (Hi/Lo) m3/h 1600/1420 1600/1420 1600/1420
Indoor noise level (Hi/Lo) dB(A) 47/44 47/44 47/44

5
Dimension (W*H*D)(body) mm 840310840 840310840 840310840
Packing (W*H*D)(body) mm 1020400930 1020400930 1020400930
Net/Gross weight(body) kg 40/50 40/50 40/50
Dimension (W*H*D)(panel)
mm 95040950 95040950 95040950
Packing (W*H*D)(panel)
mm 10301451030 10301451030 10301451030
Indoor unit
Net/Gross weight(panel)
kg 6/11 6/11 6/11
Model

YDK250-6D-WL YDK250-6D-WL YDK65-6WL;
YDK65-6F
Brand

WELLING WEILING WELLING
Input W 307 307 138+156
Capacitor uF 10 10 3.52
Outdoor fan
motor
Speed r/min 740 740 800
Number of rows

2 2 2
Tube pitch(a)x row pitch(b)
mm 25.422 25.422 25.422
Finspacing
mm 1.7 1.7 1.8
Fin type (code)

unhydrophilic
aluminium
unhydrophilic
aluminium
hydrophilic
aluminium
Tube outside dia.and type
mm Ø9.53,
innergroove tube
Ø9.53,
innergroove tube
Ø9.53,
innergroove tube
Coil length x height x width
mm 95591544 95591544 715122044
Outdoor coil
Number of circuits

8 8 4
Outdoor air flow m3/h 8 5000 5000
Outdoor noise level dB(A) 5000 57 58
Dimension(W*H*D) mm
57 990960360 9401245360
Packing (W*H*D) mm 990960360 11201090435 10201370435
Outdoor unit
Net/ Gross weight kg 11201090435 101/106 110/125
Refrigeranttype/Quantity
g R410A/3100 R410A/3100 R410A/4000
Design pressure (high side/low side)
MPa 4.2/2.5 4.2/2.5 4.2/2.5
Liquid side mm(inch)
12.7 (1/2) 12.7 (1/2) 12.7 (1/2)
Gas side mm(inch)
19 (3/4) 19 (3/4) 19 (3/4)
Max. pipe length m 30 30 30
Refrigerant
piping
Max. difference in level
m 20 20 20
Operation temp

17~30 17~30 17~30
Ambient temp

-7~45 -7~45 -7~45
Applicationarea m
250~75 60~85 80~105
Qty’per 20’& 40’Fcl Pieces 25/55/62 25/55/62 24/52/55
Notes: 1. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB; Outdoor temp: 35°CDB;
2. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB; Outdoor temp: 7°CDB, 6°CWB;
3. Actual noise level may differ, depending on the room structure, etc, since these noise values are from an

6
anechoic room.
Part 3. Noise level
FOUR-WAY CASSETTE TYPE
Microphone
1.0m
12.000~24,000 btu/h 30,000~48,000 btu/h
Octave band center frequency £¨ Hz £©
Sound pressure level dB
£¨
0dB=0.0002
|Ì
bar
£©
Audibility limits of
continuous white
sound
Octave band center frequency£¨Hz£©
Sound pressure level dB£¨
0dB=0.0002|Ì bar£©
Audibility limits of
continuous white
sound

7
Part4. Velocity & temperature distribution
Discharge angle 60º
Airflow velocity
Temperature
Part5. Operation range
Ensure the operating temperature is in allowable range.
Ambient emp.(¡ã C)
Heating
STD
3024
17
17
-7
6
Indoor temp.(¡ã C)
Indoor temp.(¡ã C)
17
-7
17
35
52
45
30
Cooling
Ambient emp.(¡ã C)
STD
24

8
Part6. Capacity table
Model: YKHC 12-18
COOLING

OUTDOOR CONDITIONS
Indoor
Conditions

21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 5.12 4.90 4.72 4.45 4.27 4.14 4.01
Sensitive capacity kW 4.10 3.92 3.78 3.56 3.42 3.31 3.21
21ºC D
15ºC W Input kW. 1.20 1.37 1.54 1.71 1.88 2.05 2.22
Total capacity kW 5.61 5.36 5.17 4.88 4.68 4.53 4.39
Sensitive capacity kW 4.49 4.29 4.13 3.90 3.74 3.63 3.51
24ºC D
17ºC W Input kW. 1.26 1.44 1.62 1.81 1.99 2.17 2.35
Total capacity kW 6.10 5.83 5.62 5.30 5.09 4.93 4.77
Sensitive capacity kW 4.88 4.66 4.49 4.24 4.07 3.94 3.82
27ºC D
19ºC W
Input kW. 1.33 1.52 1.71 1.90 2.09 2.28 2.47
Total capacity kW 7.01 6.70 6.46 6.10 5.85 5.67 5.49
Sensitive capacity kW 5.61 5.36 5.17 4.88 4.68 4.53 4.39
32ºC D
23ºC W
Input kW. 1.53 1.75 1.97 2.19 2.40 2.62 2.84
Model: YKHC 12-18
HEATING OUTDOOR CONDITIONS
Indoor
Conditions
24ºC D
18ºC W
12ºC D
11ºC W
7ºC D
6ºC W
4ºC D
3ºC W
0ºC D
-1ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-15ºC D
-16ºC W
Capacity kW 7.20 5.76 4.80 4.32 4.08 3.60 3.36 3.12
15ºC Input kW. 2.28 1.82 1.52 1.44 1.37 1.29 1.22 1.06
Capacity kW 8.10 6.48 5.40 4.86 4.59 4.05 3.78 3.51
18ºC Input kW. 2.57 2.05 1.71 1.62 1.54 1.45 1.37 1.20
Capacity kW 9.00 7.20 6.00 5.40 5.10 4.50 4.20 3.90
20ºC Input kW. 2.85 2.28 1.90 1.81 1.71 1.62 1.52 1.33
Capacity kW 9.90 7.92 6.60 5.94 5.61 4.95 4.62 4.29
22ºC Input kW. 3.14 2.51 2.09 1.99 1.88 1.78 1.67 1.46
Capacity kW 11.70 9.36 7.80 7.02 6.63 5.85 5.46 5.07
27ºC Input kW. 3.71 2.96 2.47 2.35 2.22 2.10 1.98 1.73

9
Model: YKHC-24
COOLING

OUTDOOR CONDITIONS
Indoor
Conditions

21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 6.86 6.56 6.32 5.96 5.73 5.55 5.37
Sensitive capacity kW 5.49 5.25 5.06 4.77 4.58 4.44 4.29
21ºC D
15ºC W Input kW. 1.61 1.84 2.07 2.30 2.53 2.76 3.00
Total capacity kW 7.51 7.19 6.92 6.53 6.27 6.07 5.88
Sensitive capacity kW 6.01 5.75 5.54 5.23 5.02 4.86 4.70
24ºC D
17ºC W Input kW. 1.70 1.95 2.19 2.43 2.68 2.92 3.16
Total capacity kW 8.17 7.81 7.53 7.10 6.82 6.60 6.39
Sensitive capacity kW 6.53 6.25 6.02 5.68 5.45 5.28 5.11
27ºC D
19ºC W
Input kW. 1.79 2.05 2.30 2.56 2.82 3.07 3.33
Total capacity kW 9.39 8.98 8.65 8.17 7.84 7.59 7.35
Sensitive capacity kW 7.51 7.19 6.92 6.53 6.27 6.07 5.88
32ºC D
23ºC W
Input kW. 2.06 2.36 2.65 2.94 3.24 3.53 3.83
Model: YKHC-24
HEATING OUTDOOR CONDITIONS
Indoor
Conditions
24ºC D
18ºC W
12ºC D
11ºC W
7ºC D
6ºC W
4ºC D
3ºC W
0ºC D
-1ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-15ºC D
-16ºC W
Capacity kW 9.60 7.68 6.40 5.76 5.44 4.80 4.48 4.16
15ºC Input kW. 3.00 2.40 2.00 1.90 1.80 1.70 1.60 1.40
Capacity kW 10.80 8.64 7.20 6.48 6.12 5.40 5.04 4.68
18ºC Input kW. 3.38 2.70 2.25 2.14 2.03 1.91 1.80 1.58
Capacity kW 12.00 9.60 8.00 7.20 6.80 6.00 5.60 5.20
20ºC Input kW. 3.75 3.00 2.50 2.38 2.25 2.13 2.00 1.75
Capacity kW 13.20 10.56 8.80 7.92 7.48 6.60 6.16 5.72
22ºC Input kW. 4.13 3.30 2.75 2.61 2.48 2.34 2.20 1.93
Capacity kW 15.60 12.48 10.40 9.36 8.84 7.80 7.28 6.76
27ºC Input kW. 4.88 3.90 3.25 3.09 2.93 2.76 2.60 2.28

10
Model: YKHC-30
COOLING

OUTDOOR CONDITIONS
Indoor
Conditions

21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 8.50 8.13 7.84 7.39 7.10 6.87 6.65
Sensitive capacity kW 6.80 6.50 6.27 5.91 5.68 5.50 5.32
21ºC D
15ºC W Input kW. 2.05 2.34 2.63 2.93 3.22 3.51 3.80
Total capacity kW 9.31 8.91 8.58 8.10 7.77 7.53 7.29
Sensitive capacity kW 7.45 7.12 6.87 6.48 6.22 6.02 5.83
24ºC D
17ºC W Input kW. 2.16 2.47 2.78 3.09 3.40 3.71 4.01
Total capacity kW 10.12 9.68 9.33 8.80 8.45 8.18 7.92
Sensitive capacity kW 8.10 7.74 7.46 7.04 6.76 6.55 6.34
27ºC D
19ºC W
Input kW. 2.28 2.60 2.93 3.25 3.58 3.90 4.23
Total capacity kW 11.64 11.13 10.73 10.12 9.72 9.41 9.11
Sensitive capacity kW 9.31 8.91 8.58 8.10 7.77 7.53 7.29
32ºC D
23ºC W
Input kW. 2.62 2.99 3.36 3.74 4.11 4.49 4.86
Model: YKHC-30
HEATING OUTDOOR CONDITIONS
Indoor
Conditions
24ºC D
18ºC W
12ºC D
11ºC W
7ºC D
6ºC W
4ºC D
3ºC W
0ºC D
-1ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-15ºC D
-16ºC W
Capacity kW 11.28 9.02 7.52 6.77 6.39 5.64 5.26 4.89
15ºC Input kW. 3.90 3.12 2.60 2.47 2.34 2.21 2.08 1.82
Capacity kW 12.69 10.15 8.46 7.61 7.19 6.35 5.92 5.50
18ºC Input kW. 4.39 3.51 2.93 2.78 2.63 2.49 2.34 2.05
Capacity kW 14.10 11.28 9.40 8.46 7.99 7.05 6.58 6.11
20ºC Input kW. 4.88 3.90 3.25 3.09 2.93 2.76 2.60 2.28
Capacity kW 15.51 12.41 10.34 9.31 8.79 7.76 7.24 6.72
22ºC Input kW. 5.36 4.29 3.58 3.40 3.22 3.04 2.86 2.50
Capacity kW 18.33 14.66 12.22 11.00 10.39 9.17 8.55 7.94
27ºC Input kW. 6.34 5.07 4.23 4.01 3.80 3.59 3.38 2.96

11
Model: YKHC-36
COOLING

OUTDOOR CONDITIONS
Indoor
Conditions

21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 10.14 9.70 9.35 8.82 8.47 8.20 7.94
Sensitive capacity kW 8.11 7.76 7.48 7.06 6.77 6.56 6.35
21ºC D
15ºC W Input kW. 2.33 2.66 3.00 3.33 3.66 4.00 4.33
Total capacity kW 11.11 10.63 10.24 9.66 9.27 8.98 8.69
Sensitive capacity kW 8.89 8.50 8.19 7.73 7.42 7.19 6.96
24ºC D
17ºC W Input kW. 2.46 2.81 3.16 3.52 3.87 4.22 4.57
Total capacity kW 12.08 11.55 11.13 10.50 10.08 9.77 9.45
Sensitive capacity kW 9.66 9.24 8.90 8.40 8.06 7.81 7.56
27ºC D
19ºC W
Input kW. 2.59 2.96 3.33 3.70 4.07 4.44 4.81
Total capacity kW 13.89 13.28 12.80 12.08 11.59 11.23 10.87
Sensitive capacity kW 11.11 10.63 10.24 9.66 9.27 8.98 8.69
32ºC D
23ºC W
Input kW. 2.98 3.40 3.83 4.26 4.68 5.11 5.53
Model: YKHC-36
HEATING OUTDOOR CONDITIONS
Indoor
Conditions
24ºC D
18ºC W
12ºC D
11ºC W
7ºC D
6ºC W
4ºC D
3ºC W
0ºC D
-1ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-15ºC D
-16ºC W
Capacity kW 13.68 10.94 9.12 8.21 7.75 6.84 6.38 5.93
15ºC Input kW. 4.02 3.22 2.68 2.55 2.41 2.28 2.14 1.88
Capacity kW 15.39 12.31 10.26 9.23 8.72 7.70 7.18 6.67
18ºC Input kW. 4.52 3.62 3.02 2.86 2.71 2.56 2.41 2.11
Capacity kW 17.10 13.68 11.40 10.26 9.69 8.55 7.98 7.41
20ºC Input kW. 5.03 4.02 3.35 3.18 3.02 2.85 2.68 2.35
Capacity kW 18.81 15.05 12.54 11.29 10.66 9.41 8.78 8.15
22ºC Input kW. 5.53 4.42 3.69 3.50 3.32 3.13 2.95 2.58
Capacity kW 22.23 17.78 14.82 13.34 12.60 11.12 10.37 9.63
27ºC Input kW. 6.53 5.23 4.36 4.14 3.92 3.70 3.48 3.05

12
Model: YKHC-48
COOLING

OUTDOOR CONDITIONS
Indoor
Conditions

21ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 13.52 12.94 12.47 11.76 11.29 10.94 10.58
Sensitive capacity kW 10.82 10.35 9.97 9.41 9.03 8.75 8.47
21ºC D
15ºC W Input kW. 2.96 3.38 3.81 4.23 4.65 5.08 5.50
Total capacity kW 14.81 14.17 13.65 12.88 12.36 11.98 11.59
Sensitive capacity kW 11.85 11.33 10.92 10.30 9.89 9.58 9.27
24ºC D
17ºC W Input kW. 3.13 3.57 4.02 4.47 4.91 5.36 5.80
Total capacity kW 16.10 15.40 14.84 14.00 13.44 13.02 12.60
Sensitive capacity kW 12.88 12.32 11.87 11.20 10.75 10.42 10.08
27ºC D
19ºC W
Input kW. 3.29 3.76 4.23 4.70 5.17 5.64 6.11
Total capacity kW 18.52 17.71 17.07 16.10 15.46 14.97 14.49
Sensitive capacity kW 14.81 14.17 13.65 12.88 12.36 11.98 11.59
32ºC D
23ºC W
Input kW. 3.78 4.32 4.86 5.41 5.95 6.49 7.03
Model: YKHC-48
HEATING OUTDOOR CONDITIONS
Indoor
Conditions
24ºC D
18ºC W
12ºC D
11ºC W
7ºC D
6ºC W
4ºC D
3ºC W
0ºC D
-1ºC W
-5ºC D
-6ºC W
-7ºC D
-8ºC W
-15ºC D
-16ºC W
Capacity kW 18.24 14.59 12.16 10.94 10.34 9.12 8.51 7.90
15ºC Input kW. 5.88 4.70 3.92 3.72 3.53 3.33 3.14 2.74
Capacity kW 20.52 16.42 13.68 12.31 11.63 10.26 9.58 8.89
18ºC Input kW. 6.62 5.29 4.41 4.19 3.97 3.75 3.53 3.09
Capacity kW 22.80 18.24 15.20 13.68 12.92 11.40 10.64 9.88
20ºC Input kW. 7.35 5.88 4.90 4.66 4.41 4.17 3.92 3.43
Capacity kW 25.08 20.06 16.72 15.05 14.21 12.54 11.70 10.87
22ºC Input kW. 8.09 6.47 5.39 5.12 4.85 4.58 4.31 3.77
Capacity kW 29.64 23.71 19.76 17.78 16.80 14.82 13.83 12.84
27ºC Input kW. 9.56 7.64 6.37 6.05 5.73 5.41 5.10 4.46

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Part7. Electric control functions
1. Performance Index
No. Item Index
1 Applicable Voltage Range 165-253V~, 343-418V~
2 A/C Frequency 50Hz
3 Working environment temperature -7°C- +45°C
2. Main Parts Introduction
2.1 Indoor Fan
High speed and low speed.
Breeze speed for anti-cold air.
2.2 Outdoor Fan
High speed and low speed.
Remark : some model just have one speed.
2.3 Buzzer
2.3.1 It will buzz when its driving port in the main chip outputs high level.
2.3.2 It will buzz once when the main frame receives remote start-up signal.
2.3.3 It will buzz once for 1 second when receiving turn-off signal.
2.3.4 It will buzz for 0.5 second once receiving other signal.
2.4 Indicator
2.4.1 There are 4 indicators: operating indicator, timer indicator, water level warning indicator, defrosting
indicator and pre-heating indicator (wind-delivery indicator for cooling-only A/C).
2.4.2 LED indicates errors when protection is in effective.
2.5 Four-way Valve
It is controlled by relays.
2.6 Condensate Pump
It is controlled by relays.

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3. Operation Modes and Functions
3.1 Manual Operation
3.1.1 The manual operation mode is controlled through “manual” pad in the wind in-take grid, including such two
modes as manual action and manual cooling. Push the manual pad for each switchover, the order for which
is shown below:
3.1.2 Manual Cooling
3.1.2.1 Under this mode, no remote control signal will be received.
3.1.2.2 The compressor is started up unconditionally and the rotating speed of indoor and outdoor fans is set to be
in high and forced cooling operation.
3.1.2.3 Under this mode, the buzzer will buzz twice with each lasting 0.5 second at 0.5 interval. During the first
30 minutes of unconditional forced cooling operation, the operation indicator will blink at 0.5Hz. In the
process of switchover to manual action mode, the buzzer buzzes for 0.5 second and the indicator is
illuminated.
3.1.2.4 Under this mode, the corresponding protections are in effective (3- minute delayed start-up, over current,
outdoor protection and evaporator low temperature protection.). Corresponding protection will act once any
protection is in active.
Push “manual” pad once to end this mode and enter the remote control pending status. The buzzer will buzz
for 1 second and the indicator turn off.
3.1.3 Manual Action
3.1.3.1 Under this mode, the remote signal will be received and corresponding actions will be taken accordingly
upon the receipt of the remote signal.
3.1.3.2 On entering this mode, the buzzer will buzz for 0.5 second and the indicator on.
3.1.3.3 The system will operate under the auto mode whose temperature is set to be 24°C and at the same time,
the wind grille will swing automatically.
3.1.3.4 Under this mode, corresponding protections are in effective.
3.1.3.5 Push “ manual” pad to end this mode and switch over to manual cooling mode.
REMOTE CONTROL
MANUAL ACTION MANUAL COOLING

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3.2 Heating Mode
3.2.1 Four-way valve opens at once, while defrosting process closes.
3.2.2 Condition for the compressor action: (Ts = set temperature, Ta = room temperature)
Condition Compressor Outdoor fan
Ta> Ts+4 Off OffRoom temp. up
Ta<Ts+4 On On
Ta< Ts+3 On On
Room temp. down
Ta>Ts+3 Off Off
3.2.3 Indoor Fan Action
3.2.3.1 Anytime remote switchover for fan speed among high/low/auto, (anti-cold air function takes priority).
3.2.3.2 Anti-cold air:
Switchover between fan speed and fine tune can be set according to temperature of evaporator pipe .
Condition
T= Indoor exchanger temp.
Indoor fan speed
T<25°C Off
25°C <T<32°C Breeze
Indoor exchanger temp. up
T>32°C Setting fan speed
T> 30°C Setting fan speed
15°C <T<30°C Breeze
Indoor exchanger temp. down
T<15°C Off
During anti-cold air period, if indoor fan is shut down, then pre-heating/defrosting lamp is on. Once indoor
fan starts, pre-heating/defrosting lamp will be off.
3.2.3.3 Auto fan of indoor fan under heating mode.
Condition (T =Indoor Temp.-Setting Temp.) Indoor fan speed
T<3°C HighRoom temp. up
T>3°C Low
T> 1°C Low
Room temp. down
T<1°C High

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3.3 Defrost (only available to heating mode)
3.3.1 The defrosting of 2HP, 3HP is processed by indoor control board.
3.3.1.1 Defrosting Conditions
3.3.1.1.1 Low temperature defrosting condition:
Accumulated operating time when temperature of outdoor heat exchanger coil T3 is below -2°C reaches
up to over 40 minutes.
3.3.1.1.2 High temperature defrosting condition:
Under high temperature protection of evaporator, the time when outdoor fan is shut down but compressor
is not has been accumulated for up to 90 minutes. It is considered that defrosting is performed when
either 3.3.1.1 or 3.3.1.2 is met.
3.3.1.2 Defrosting Action
Four-way valve and outdoor fan are shut down. Indoor fan operates according to anti-cold air function.
Compressor keeps on continuously.
3.3.1.3 Ending Of Defrosting Condition
It is considered that defrosting condition is ended when any of the conditions is met:
3.3.1.3.1 Operating current of compressor reaches 1.5Ie.
3.3.1.3.2 Time of defrosting reaches 10 minutes.
3.3.1.3.3 Temperature of outdoor coil T3 is up to 20°C.
3.3.1.4 Ending Action of Defrost
3.3.1.4.1 Outdoor fan and four-way valve are open.
3.3.1.4.2 Compressor keeps on continuously.
3.3.1.4.3 Indoor fan acts according to anti-cold air function.
3.3.1.4.4 Defrosting/pre-heating lamp continues to be on until indoor fan starts up.
3.3.2 The defrosting of 3.5~5HP(3N) is processed by outdoor control board.
3.3.2.1 Defrosting Conditions(any of the following conditions is meet)
3.3.2.1.1 Under indoor pipe high temperature protection in heating mode, accumulated operating time is up to 90
minutes.(if outdoor fan is off and compressor are cut down, time again.)
3.3.2.1.2 When T48,1min, process the normal defrost mode: compressor operates continue 40 minute, the
accumulated time up to 40 minutes when pipe temperature sensor T3-2(if compressor is off, time again);
when defrosting ends, check T4 again.
3.3.2.2 Defrosting Action
When defrosting, the outdoor four-way valve is power off, defrosting valve is power on, outdoor fan is off,
compressor operate continue, indoor fan operates according to anti-cold air condition in heating mode. If indoor
fan is to be off, cut down the electric auxiliary heater and after 15 seconds cut down indoor fan.
3.3.2.3 Ending Action of Defrost(any of the following conditions is met)
3.3.2.3.1 Time of defrosting reaches 10 minutes.
3.3.2.3.2 Temperature of outdoor coil T3 is up to 20°C
3.3.2.4 Ending Action of Defrost
Operate in normal heating mode. After defrost stops, indoor fan starts to operate according to anti-cold air
condition.
.

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3.4 Cooling Mode
3.4.1 Four-way valve is closed. If four-way valve is open before the mechine enters cooling mode, then four-way
valve will be closed at the first time the compressor starts under the cooling mode.
3.4.2 Conditions for the compressor and outdoor fan action (Ts = set temperature, Ta=room temperature)
Condition Compressor Outdoor fan
Ta > Ts+1 On OnRoom temp. up
Ta <Ts+1 Off Off
Ta > Ts On On
Room temp. down
Ta <Ts Off Off
3.4.3 Action of Indoor Fan
3.4.3.1 HIGH/LOW/AUTO fan can be switched over for your comfort.
3.4.3.2 Auto fan under cooling mode.
Condition (T=Indoor Temp.-Setting Temp.) Indoor fan speed
T<4°C LowTemp. up
T>4°C High
T> 1°C High
Temp. down
T<1°C Low
3.5 Dehumidifying Mode
3.5.1 Dehumidifying mode is the cooling operation, under which the indoor fan is high and outdoor fan is low.
3.5.2 Protective condition is actived.
3.6 Auto Mode
3.6.1 Under auto mode, the indoor fan is set to be auto (refer to auto fan under cooling, heating).
3.6.2 When entering auto mode, the heating, fan only or cooling operation will be automatically chosen according
to the room temperature Ta and the set temperature Ts.
3.6.2.1 When Ta < Ts - 1°c, it performs the heating operation with a set temperature of Ts - 1°c (refer to the
heating mode). However the cool only model will be in low fan.
3.6.2.2 When Ts + 2°c Ta Ts - 1°c, control according to cooling auto fan with a set temperature of
23°c.
3.6.2.3 When Ta > Ts +2°c, it performs the cooling operation with a set temperature of Ts (refer to the cooling
mode).
3.6.3 After one mode is chosen, if the condition Ta > Ts+1°c or Ta < Ts - 1°c lasts for 15 minutes, meanwhile the
compressor doesn't start up within consecutive 15 minutes, the operation mode will be re-chosen according
to the Ta and Ts.
3.6.4 Protective condition is actived.
3.7 Fan Only Mode
3.7.1 Under this mode, four-way valve, compressor and outdoor fan are shut down.
3.7.2 High/Low/Auto fan can be switched over through manual control. Auto fan will be controlled in line with
cooling auto fan with temperature set to be 23°C.
3.7.3 After entering fan mode, the operating indicator is on. If the model is cooling only mode, fan indicator is on
at the same time.

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4. Other Functions
4.1 LED Display
Operation lamp, timer lamp, defrosting/pre-heating lamp, and water level alarm lamp.
4.1.1 Operation Lamp
When the operation is recovering, it will blink at 1 Hz.
After the unit is on, the lamp will keep on.
After the unit is off, the lamp will be off.
When the unit is switched over from manual cooling to remote control, the lamp will be off.
4.1.2 Timer Lamp
During timer operation, it will be on.
4.1.3 Defrosting/Pre-Heating Lamp
When heat pump model performs defrosting or anti-cold air, it will be on.
4.1.4 Water Level Alarm Lamp
When water level is above the alarm level, it will blink at 5Hz.
4.2 Timer
Refer to remote controller manual for detail operation.
Note: The timer is valid for one operation of the A/C.
4.3 Louver Action
Closed angle at energized Heating Cooling or dehumidifying Swing range
55°30°30°0-30°
The swing angle is between 15° and-15° with 15°being its center .
4.4 Condensate Pump
4.4.1 The action of the water pump is controlled by water level switch.
4.4.2 Control procedures (check water level every 5 seconds )
4.4.2.1 When entering cooling mode, dehumidifying mode or forced cooling mode, condenser starts at once and
operates continue until the above modes stop.
4.4.2.2 Under stand-by, heating or fan mode, if the water level in water receiver rises to the position of the water
switch, the controller will make LED flashing to give warning signal, and at the same time forces compressor to
stop and the drain pump start. The water level will be checked continuously. If the water level falls to warning
water level, the warning signal will disappear( the drain pump delay 1 minute to be off), compressor starts again(3
minutes protection takes priority), and operation recovers according to former setting mode. On the other wise,
after 3 minutes, the whole unit stops(including drain pump) and warning signal can”t disappear. It can”t recover
unless out of power.