Rated input power rangeW750~1870 1450~2430 2050~2600 2650
Cooling
Rated current range A
EER
Heating Capacity rangeBtu/h
Rated input power rangeW850~1790 1470~2520 2020~2650 2700
Heating
Rated current range A
COP
Max. input consumption W
Max. current A
Model
Type
Brand
Capacity Btu/h18000(60HZ)
Compressor
Input W1690(60HZ)
Rated current(RLA) A11.6(60HZ)
1Ph,220-240V~,50Hz
7000~18000 14000~24000 21000~26000 27000
3.1~7.8 6.1~10.1 8.56~10.9 11.1
10.2
9000~18000 16000~25000 21000~27000 28000
3.5~7.5 6.1~10.5 8.43~11.1 11.3
10.4
4500
25
BA160X2CS-20KU
Rotary inverter
GD Toshiba
Outdoor fan
motor
6
Locked rotor Amp(LRA) A60
Thermal protector
Capacitor uF85UF/250V
Refrigerant oil mlRB68AF/α68TF/T-68 750 ml
Model
Brand
Internal
YDK100-6
Welling
Input W
169(HIGH)
Capacitor uF
Speed r/min
a.Number of rows
b.Tube pitch(a)x row pitch(b) mm
c.Fin spacing mm
Outdoor coil
Outdoor air flow m3/h
Outdoor noise level dB(A)
Outdoor unit
Refrigerant type and chargeg
Design pressure(Hi/Lo) MPa
d.Fin type (code)
e.Tube outside dia.and type mm
f.Coil length x height x width mm
g.Number of circuits
Dimension(W*H*D)mm
Packing (W*H*D)mm
Net/Gross weight Kg
Liquid side/ Gas side mm(inch)
5uF/500VAC
900(HIGH)
2
25.4×22
1.5
Hydrophilic aluminium
φ9.53 innergroove tube
850×810×44
2
3500
57
895X860X330
1043X915X395
80/84
R410A, 2700
4.2/2.5
6.35(1/4)/9.53(3/8)
Refrigerant
piping
Connection wiring
Plug type
Thermostat type
Operation temp
7
Max. refrigerant pipe length for
each unit
Max. difference in level between
indoor and outdoor unit
Cooling
heating
m
m
℃
℃
20
10
No
No
Electronic control
17~43
-7~21
Qty’per 20’ /40’ /40'HQ set
Notes:
1. Nominal cooling capacities are based on the following conditions:
Indoor temp: 27°CDB, 19°CWB;
Outdoor temp: 35°CDB;
Equivalent ref. Piping: 8m(horizontal)
Outdoor operating frequency:78Hz
Indoor combination:7K X4, setting temp.:17℃,setting fan speed: high speed.
2. Nominal heating capacities are based on the following conditions:
Indoor temp: 20°CDB;
Outdoor temp: 7°CDB, 6°CWB;
Equivalent ref. Piping: 8m(horizontal)
Outdoor operating frequency:85Hz
Indoor combination:7K X4, setting temp.:30℃,setting fan speed: high speed.
3. Actual noise level may differ, depending on the room structure, etc, since these noise values are from an anechoic room.
8
3.Outline and dimension
600
Hook
Panel
Chart 4
Ceiling
895
Indoor unit(7k/9k/12k/18k):
611(Hook-location)
600(Ceiling hole)
650(Panel)
580(Body)
Drain side and
Tubing side
Body
Outdoor unit
163141
0
0
5
0
3
5
3
3
3
401(Hook-location)
580(Body)
600(Ceiling hole)
650(Panel)
1013
590
42228.5
67
COMP
Nut
265
A
9
4.Indoor unit combination:
Caution on combination
The one-drive-four outdoor unit SMF-4E27AI nominal cooling capacity is 8kw(under
condition of ambient temp. 35℃db/24℃wb, indoor temp. 27℃db/19℃wb). According to
refrigeration design criterion, total indoor unit capacity should be equal to outdoor capacity,
otherwise, we can not guarantee best performance and safe operation. Although, we made
special design on refrigeration system regarding customer’s requirements. Based on this,
when indoor total capacity exceed outdoor capacity, the machine can still run. Under this
condition, the single indoor unit capacity will attenuate. That means you can not gain the
nominal capacity, but smaller than it. We are out of responsibility if customers don’t follow the
notice below:
1. You can connect two, three or four indoor units according to your need;
2. The total indoor unit nominal capacity should not exceed 11.3kw(42% more than nominal
capacity);
3. There should be no more than one 18k (either cassette or duct) indoor unit when four
indoor units are connected, and other indoor unit should be all 7k;
4. When three or four indoor units are connected, there should be no more than one cassette.
If the cassette is present, the other duct should be all 7K
5. There is no limit to two indoor units combination.
6. When heating, capacity attenuate sharply if indoor unit capacity exceed too much.
10
5. Capacity table
24ºC D
12ºC D
4ºC D
0ºC D
-5ºC D
SMF-4E27AI (7k+7k+7k+7k)
COOLING OUTDOOR TEMPERATURE DRY
Indoor
Conditions
21ºC 25ºC 30ºC 35ºC 40ºC 45ºC
21ºC D
15ºC W
24ºC D
17ºC W
27ºC D
19ºC W
32ºC D
23ºC W
HEATING
Indoor
Conditions
15ºC
18ºC
20ºC
22ºC
27ºC
Total capacity kW7.637.307.036.646.376.17
Sensitive capacity kW6.115.845.635.315.104.94
Input kW.1.952.232.512.793.073.35
Total capacity kW8.367.997.707.276.986.76
Sensitive capacity kW6.696.406.165.815.585.41
Input kW.2.062.362.652.953.243.53
Total capacity kW9.098.698.37
3.413.72
Total capacity kW10.459.999.639.098.728.45
Sensitive capacity kW8.367.997.707.276.986.76
Input kW.2.502.853.213.573.924.28
OUTDOOR CONDITIONS
Capacity
kW
7ºC D
18ºC W
11º C W
6ºC W
3ºC W
-1ºC W
-6ºC W
14.66 11.739.788.808.317.336.846.35
-7ºC D
-8ºC W
-15ºC D
-16ºC W
Input kW.5.524.423.683.503.313.132.942.58
Capacity
kW
13.77 11.029.188.267.806.896.435.97
Input kW.5.184.153.463.283.11 2.942.762.42
Capacity
kW
12.75 10.20
Input kW.4.803.84
Capacity
kW
11.739.387.827.046.655.875.475.08
8.50
3.20
7.657.236.385.955.53
3.042.882.722.562.24
Input kW.4.423.532.942.802.652.502.362.06
Capacity
kW
10.20
8.166.806.125.785.104.764.42
11
Input kW.3.843.072.562.432.302.182.051.79
6. WIRING DIAGRAM
Indoor unit:
12
Outdoor unit (SMF-4E27AI)
13
7. Electric control functions:
7.1 Protection
1. 3 minutes delay at restart for compressor.
2. Temperature protection of compressor top, compressor stops when the temp. of top of
compressor is more than 120℃, compressor runs when the temp. of top of compressor is less
than 105℃.
3. When AC voltage ≥ 270V for 30 seconds, Outdoor Unit stops operation and alarms.
When AC voltage ≤ 260V for 30 seconds, Outdoor Unit resumes operation.
4. Inverter module protection, Inverter module Protection itself has a protection function
against current, voltage and temperature.
5. Sensor protection at open circuit and breaking disconnection.
6. Fan Speed is out of control. When Indoor Fan Speed is too high(higher than High
Fan+300RPM)or too low(lower than 400RPM), the unit stops and LED displays failure
information and can’t return to normal operation automatically.
7. Cross Zero signal error warning. If there is no Cross Zero signals in 4 minutes, the unit
stops and LED displays failure information and can’t return to normal operation automatically.
8. Current protection: When the current is more than 25A, the compressor stops.
9. Outdoor condenser high temperature protection: Under cooling mode, if T3>65 for 3 ℃
minutes, the compressor will stop. When T3<52, the protection is not valid.℃
10. Outdoor low temperature protection: If the outdoor temperature is lower than -15 for ℃
1hour, the compressor and fan motor will stop. If the outdoor temperature is higher than -12℃
for 10 minutes and the compressor stops operation for 1h, or the outdoor temperature is
higher than 5℃ for 10 minutes, then restart and enter into the prior operation mode.
11. Compressor pre-heating function: When the outdoor temperature is lower than 3℃ and
the compressor stops operation for more than 3 hours, or the outdoor temperature is lower
than 3℃ and the power is just put on, the compressor enters into pre-heating condition. When
outdoor temp. is more than 5℃ or user operate it, pre-heating condition will finish.
7.2 Operating mode
7.2.1 Cooling mode
1.Indoor fan keeps running, fan speed can be set in high/mid/low/ Auto:
2.Auto fan at cooling mode: (T=Indoor Temp.-Setting Temp.)
Condition Indoor fan speed
Room temp. up
Room temp. down
3.Anti-freezing control to indoor evaporator at cooling mode( T: evaporator temp. )
Evaporator Temp. Compressor
14
T<1.5℃Low
1.5℃<T<4℃Mid.
T>4℃High
T> 3℃High
1<T<3℃℃ Mid.
T<1℃Low
T< 4℃Off
T > 8℃On
7.2.2 Dehumidifying mode
1.The indoor fan is fixed in low speed
2. Low room temperature protection:
When room temperature decreases to below 10℃, indoor fan stop, when room temperature
restores to over 12℃, indoor fan start.
3.At dehumidifying mode, the anti-freezing function of the indoor heat exchanger is the same
as that of cooling mode.
7.2.3 Heating mode
1. Indoor Fan actions at heating mode
Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold
wind function prevails.
Anti-cold wind control function at heating mode
Condition
Indoor fan speed
T= Indoor exchanger
temp.
Indoor exchanger temp.
up
T<34℃Off
34℃<T<37℃Breeze
37℃<T<44℃Low speed
T> 44℃Setting fan speed
Indoor exchanger temp.
down
T> 38℃Setting fan speed
33℃<T<38℃Low speed
24℃<T<33℃Breeze
T<24℃Off
1. Auto wind at heating mode
Condition
Indoor fan speed
T=Indoor Temp.-Setting Temp.
Room temp. up
T<1.5℃High
1.5℃<T<2.5℃Mid.
T>2.5℃Low
Room temp. down
T<1.0℃High
1.0℃<T<2.0℃Mid.
T>2.0℃Low
2. Indoor evaporator high-temperature protection at heating mode
Condition
Compressor
T= Indoor exchanger temp.
T<48℃On
53℃<T<63℃Decrease frequency of compressor
T>63℃Off
7.2.4 Defrost operation
1. Defrosting condition:
The temperature of outdoor heat exchanger remains consecutively lower than -2°c for more
than 40 minutes,
2.Ending condition of defrosting
15
If one of following conditions is satisfied, end the defrost and turn into heating mode:
a. The defrost time has reached to 10 minutes.
b. When the temperature of outdoor heat exchanger rises up to 15°C.
3. Defrosting Actions:
a. Compressor runs.
b. 4 way valve switches off,
c. Outdoor fan switches off
d. Indoor fan running according to anti-cold wind function in heating mode.
4. Automatic operation mode
The air conditioner automatically selects one of the following operation modes: cooling,
heating or fan only according to the temp. difference between room temp. (TA) and set
temp. (TS).
TA—TS Operation mode
TA—TS>2℃Cooling
-1≤TA℃-TS≤+2℃Fan-only
TA-TS<-1℃Heating (air-only for cooling only type)
7.3 Mode conflict
The indoor units can not work cooling mode and heating at same time.
Heating mode has a priority.
7.3.1 Definition
Cooling mode Heating Mode Fan Off
Cooling mode
Heating Mode
Fan No Yes No No
Off No No No No
No Yes No No
Yes No Yes No
No: No mode conflict;
Yes: Mode conflict
7.3.2 In case of one Indoor unit working in cooling mode or fan mode, and another indoor
unit is set to heating mode, the indoor unit working in cooling mode or fan mode will
change to stand by. The outdoor unit will work in heating mode.
7.3.3 In case of one Indoor unit working in heating mode, and another indoor unit is set to
cooling mode or fan mode, the indoor unit setting to cooling mode or fan mode will
change to stand by.
7.4 Manual switch
Mode changes when push this button.
Cooing modeà Auto modeàUnit offà Cooing mode
At Cooing mode, after 30 minutes cooling operation whose fan speed is set as low, the
A/C operates with a setting temp. of 24℃.
At auto mode, the A/C operates with a set temp. of 24℃
7.5 Timer Function
16
1. The maximum length of timer is 24 hours and the minimum resolving power is 15 minutes.
2. Timer on: first turn off the A/C, the A/C will be automatically on at the set time.
3. Timer off: first turn on the A/C, the A/C will be automatically off at the set time
4. Timer on/off function( on time is earlier than off time): first turn off the A/C, it will be
automatically on at set time, and later be off at the set time, then unit turns on at set time.
5. Timer off/on function( off time is earlier than on time): first turn on the A/C, it will be
automatically off at set time, and later be on at the set time, then unit turns off at set time.
7.6 Auto restart function
In case of a sudden power failure, this function automatically sets the unit to previous settings
before the power failure when power returns.
7.7 Cooling capacity test frequency locked.
When test the cooling capacity, the frequency can be locked at 78Hz by following the below:
1. Set the indoor temp. to 17℃ and high speed;
2. Push the outdoor check button for 5 seconds, then its frequency can be fixed at 78Hz.
After the test is over, turn off the indoor to exit.
When test the heating capacity, the frequency can be locked at 85Hz by following the below:
1. Set the indoor temp. to 30℃ and high speed;
2. Push the outdoor check button for 5 seconds, then its frequency can be fixed at 78Hz.
After the test is over, turn off the indoor to exit.
7.8 Indoor unit indicator display function:
Operation Timer De-frost Alarm State
★
X X
X
X X X
★ ★
★
★
★
★
★
★
flash, ● light, ★X extinguished.
X X X Indoor room temp. sensor open or short-circuit
★
★
X X
●
●
X
X
X
X X Indoor and outdoor communication error
X X EEPROM error
X X Outdoor sensor open or short circuit
X
●
● ●
★ ★
X Indoor pipe temp. sensor open or short-circuit
★
●
●
X Compressor top temp. protection
Water level alarm
Inverter module protection
Outdoor voltage protection
Mode conflict
Outdoor current protection
17
7.9 Outdoor unit LED display function:
1. When stand-by it display number of indoor unit online;
2. When operation it display frequency of outdoor unit;
3. When defrost it display “df”;
4. When a protection or error occurred, it display as the following table:
Display Explanation
E0 EEPROM error
E1 No 1 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E2 No 2 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E3 No 3 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E4 Outdoor temp. sensor or connector of temp. sensor is defective
E5 Compressor voltage protection
E6 No 4 Indoor units pipe temp. sensor or connector of pipe temp. sensor is defective
E7 Indoor and outdoor communication error
P0 Compressor top protection against temperature
P1 High pressure protection
P2 Low pressure protection
P3 Compressor current protection
P4 Inverter module protection
P5 Outdoor low temp. protection
P6 Condenser high-temperature protection
7.10 Check function:
There is a check button on outdoor pcb. When push this button, the outdoor LED can display
in sequence:
Capacity demand→Running mode →revised capacity → fan state →No.1 evaporator pipe
temp. →No.2 evaporator pipe temp.→No.3 evaporator pipe temp.→No.4 evaporator pipe
temp.→outdoor pipe temp. → Outdoor temp. →discharge gas temp.→current of outdoor unit
→ No. 1 opening degree of electronic expansion valve → No. 2 opening degree of EXV →
No. 3 opening degree of EXV→No. 4 opening degree of EXV→indoor unit number→last
protection/error code→capacity demand(cycle)
Explanation for the some display content:
Display Corresponding mode
0 Off
1 Low fan
2 High fan
3. Opening degree of EXV:
Opening degree equals the display data times 8;
4. Number of indoor unit
The indoor unit that can communicate with outdoor unit normally.
7.11 Outdoor fan speed control
There is one fan with two-speed, the fan speed is controlled according ambient temp. After
the compressor stop, 30 seconds later the fan stop.
When cooling:
Ambient temp.rise
temp.decline
When heating:
Ambient temp.rise
temp.decline
> 27 High speed
<27 Low speed
>25 High speed Ambient
<25 Low speed
> 14 Low speed
<14 High speed
>12 Low speed Ambient
<12 High speed
7.12 Oil return function
If operation frequency is lower than 54Hz in 2 hours consecutively, it will be increased to 62Hz
for 3 minutes. Then it recovers to the former operation frequency.
19
12 Pipe Temperature Sensor Ass'y 1 50118121032 2244050004