SPLIT-AHU Kit 8243
SPLIT-AHU Kit 8245
GB Installation and Operating Manual
2 I Installation and Operating Manual
1. SAFETY INSTRUCTIONS
Read this manual carefully.
• This manual contains important information for correct using of this device.
• The manufacturer reserves the right to change the technical characteristics and
specication of its products without notice.
WARNING
»For repair or maintenance please order an authorised service technician.
»The unit must be connected under consideration of national installation
regulations.
»This unit is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities or lack of experience
and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.
»Keep out of reach of children and ensure that they do not play with the unit.
»It‘s not allowed to operate the unit in a damp room, e.g. bath- or washroom.
»The unit may only be operated, maintained and repaired by authorised,
trained and instructed personnel according to the local regulations.
• The following safety and operating instructions must be carefully read before
assembly, installation and commissioning.
• Electrical work must be performed by a qualied electrician. It must be ensured
that a correct fuse for power plug and main circuit is installed.
• Improper operation as a result of non-compliance may lead to injuries or
damages.
3 I Installation and Operating Manual
2. DISPOSAL
»This symbol mark is valid only for EU countries.
»This symbol complies with directive 2002/96/EG article 10.
»This Systemair product is built with high-quality materials and
components which can be recycled or reused.
»This symbol indicates that electrical and electronic equipment
must be disposed of separately from normal garbage at the end of its working
life.
»For disposal please use a suitable company or take it to an recycling point.
»In the European Union there are separate collection systems for used electrical
and electronic products.
»Please help to protect our environment!
4 I Installation and Operating Manual
3. INTRODUCTION
The SPLIT-AHU Kit 8243 and SPLIT-AHU Kit 8245 control module enables to
control inverter outdoor units SYSPLIT OUTDOOR 18/24/30/36/48/60 EVO HP Q
from Systemair. It allows to control outoor unit capacity as well as operation mode
(heating or cooling) of an air handling unit or a DX coil.
The control module enables to control inverter outdoor unit capacity between
0 - 10 % ~ 100 % by external input 0 ~ 10 VDC signal.
Dry contact signal is used to control outdoor unit to work in cooling or heating
mode.
SPLIT-AHU Kit 8243 (470153) do not have a temperature sensor and anti-frozen
protection must be from external AHU controller.
SPLIT-AHU Kit 8245 (470154) have a temperature sensor and provide evaporator
anti-frozen protection.
The installation and operation of outdoor unit as well as controller must be
done according to the manuals (i.e. User’s manual, Installation manual, Technical
Specication, Service manual).
4. SPECIFICATION AND PACKING LIST
Model SPLIT-AHU Kit 8243 / SPLIT-AHU Kit 8245
Casing Plastic
Dimension (h x w x d) 45 x 100 x 191 mm
Weight approx 0.4 kg
Operation Temperature Range -25 °C... +45 °C
Operation Humidity Range 40 - 90 %
Power Supply 230 VAC, 1 Phase, 50/60 Hz
Voltage Range 208 - 240 V
Fuse 15 A, 250 V
Resistance class IP54
Packing list
Box body 1 piece
Box cover 1 piece
Anti-water seal between box
body and box cover 1 piece
Temp sensor 1 piece (for SPLIT-AHU Kit 8245 only)
Gland 3 pieces
Manual 1 piece
5 I Installation and Operating Manual
5. SYSTEM DESIGN
Signal
communication with
outdoor unit
SPLIT-AHU Kit
8243/8245
Temperature
sensor, for
8245 only
Refrigerant pipes
Cooling
Heating
6 I Installation and Operating Manual
6. FUNCTION AND SETTING
T E MP 1
0-10V
PIPE TEMP
SENSOR
5,3 9,0
7,1 10,5 14 16
Recommended Cable
Power Supply
(between Outdoor Unit and Control Module SPLIT-AHU Kit)
2 x 1,5 mm²
Communication Line
(between Outdoor Unit and Control Module SPLIT-AHU Kit)
2 x 0,5 mm²
(shielded)
Communication Line
(between Air Handling Unit and Control Module SPLIT-AHU Kit)
10 x 0,25 mm²
NOTE
»Cable selection in accordance with the local regulations.
»No low-voltage conductors and high-voltage conductors togehter in one cable.
7 I Installation and Operating Manual
Connection Terminal Introduction:
L, N Power supply connection terminal 230 V, 1-phase, 50/60 Hz.
ALARM Digital output 5A - 250 VAC or 5A-30 VDC. When outdoor unit has mal-
function signal is activated.
DEFROST Digital output 5A - 250 VAC or 5A-30 VDC. When outdoor unit is in
defrost mode, signal is activated.
P, Q
Terminal for communication cable between controller and outdoor unit.
Should not be less than 2 x 0,5 mm2 (shielded). Different outdoor units
may have different signal terminals. Please refer to following connection:
TEMP1 Terminal for temperature senor (this connection is only for SPLIT-AHU
Kit 8245). The temperature sensor must be placed at middle of heat
changer.
0 - 10V Analog input terminal to control outdoor unit capacity.
Warning: signal input cannot exceed 10.5 V DC, otherwise it may dest-
roy this control module.
Capacity steps:
0 - 0.5 V, 0% (unit stopped)
0.5 - 1.5 V, 10 % capacity (LED display digit 1)
1.5 - 2.5 V, 20 % capacity (LED display digit 2)
...
9.5 - 10.5 V, 100% capacity (LED display digit 10)
COOL Digital input. When terminals are closed, the unit is running in cooling
mode and „COOL“ LED is on.
HEAT Digital input. When terminals are closed, the unit is running in heating
mode and „HEAT“ LED is on.
Note: Heating modehas priority . If both COOL and HEAT terminals are closed,
unit will run in HEAT mode.
E Q P
Q P
Outdoor unit
terminal
PCB terminal
Outdoor unit
terminal
Remark: If S1-Q/S2-P does not work,
then change it to S1-P/S2-Q.
S1 S2
Q P
PCB terminal
8 I Installation and Operating Manual
ENC1 Knob to select outdoor unit model.
Knob selection Condensing unit
0SYSPLIT OUTDOOR 18 EVO
HP Q (5,3 kW)
1SYSPLIT OUTDOOR 24 EVO
HP Q (7,1 kW)
2SYSPLIT OUTDOOR 30 EVO
HP Q (9,0 kW)
Knob selection Condensing unit
3SYSPLIT OUTDOOR 36 EVO
HP Q (10,5 kW)
4SYSPLIT OUTDOOR 48 EVO
HP Q (14 kW)
5SYSPLIT OUTDOOR 60 EVO
HP Q (16 kW)
LED lamps introduction:
RUN LED is lightened when controller is powered on.
HEAT LED is lightened when the unit is operating in heating mode.
COOL LED is lightened when the unit is operating in cooling mode.
DEF LED is lightened when unit is in defrost mode.
7. MALFUNCTION, ERROR CODE AND SOLVING STEPS
7.1 E1 communication error with outdoor unit
Display Code Malfunction or Protection Solving steps
E1 Communication error with outdoor unit Please refer to 5.1
E2 Temperature sensor malfunction Please refer to 5.2
Ed Outdoor unit temperature sensor mal-
function or outdoor unit protection Please refer to 5.3
dF Outdoor is defrosting It‘s normal or refer to outdoor unit
service manual
E1 display
Communication malfunction
between indoor and outdoor units.
Power off then restart the
unit 2 Minutes later.
Check whether there are
any interference such as too many
lamps power tranformers? Or the
signal wire is too long?
Remove interference or add
magnet ring on power wire.
Yes
No
No
Check whether the signal wire
is shield cable or whether the shield
cable is earthing?
Adopt shield cable/
shield cable earthing.
9 I Installation and Operating Manual
Replace indoor main PCB
Is the error distinguished?
Correct the connection.
Yes
No
Check whether the wire is correct
polarity? P to P, Q to Q, E to E?
Replace the signal wire.
Yes
Check whether the signal
wire is broken?
Check whether the signal
wires insert on PCB well?
Replace the outdoor
Main PCB.
No Pull out and insert back.
Yes
No
7.2 E2 temperature sensor malfunction
Check the connections between
temperature sensor and PCB.
Are the connections good?
Measure the resistance value
of the sensor.
Does the measured value corres-
pond to the temperature resistance
listet in appendix 1?
Replace the indoor PCB.
No
Yes
Yes
Correct the connections
Replace the sensor
No
10 I Installation and Operating Manual
7.3 Ed outdoor unit malfunction
Yes
Power off then restart the unit
2 minutes later. Check if the
outdoor main board displays error
code several minutes later?
Whether the outdoor
Main board has error Displayed
Refer to corresponding solving
steps according to outdoor
unit service manual
No
Yes
8. Dimensions (mm)
191.5
174.5
149
136.5
98.8 85.8 56.36
76
8
45 39
6
9. 25
11 I Installation and Operating Manual
Appendix 1: Temperature Sensor Resistance Value Table (°C - kΩ)
°C kΩ°C kΩ°C kΩ°C kΩ
-20 115.266 20 12.6431 60 2.35774 100 0.62973
-19 108.146 21 12.0561 61 2.27249 101 0.61148
-18 101.517 22 11.5000 62 2.19073 102 0.59386
-17 96.3423 23 10.9731 63 2.11241 103 0.57683
-16 89.5865 24 10.4736 64 2.03732 104 0.56038
-15 84.2190 25 10.000 65 1.96532 105 0.54448
-14 79.3110 26 9.55074 66 1.89627 106 0.52912
-13 74.5360 27 9.12445 67 1.83003 107 0.51426
-12 70.1698 28 8.71983 68 1.76647 108 0.49989
-11 66.0898 29 8.33566 69 1.70547 109 0.48600
-10 62.2756 30 7.97078 70 1.64691 110 0.47256
-9 58.7079 31 7.62411 71 1.59068 111 0.45957
-8 56.3694 32 7.29464 72 1.53668 112 0.44699
-7 52.2438 33 6.98142 73 1.48481 113 0.43482
-6 49.3161 34 6.68355 74 1.43498 114 0.42304
-5 46.5725 35 6.40021 75 1.38703 115 0.41164
-4 44.0000 36 6.13059 76 1.34105 116 0.40060
-3 41.5878 37 5.87359 77 1.29078 117 0.38991
-2 39.8239 38 5.62961 78 1.25423 118 0.37956
-1 37.1988 39 5.39689 79 1.21330 119 0.36954
0 35.2024 40 5.17519 80 1.17393 120 0.35982
1 33.3269 41 4.96392 81 1.13604 121 0.35042
231.5635 42 4.76253 82 1.09958 122 0.3413
329.9058 43 4.57050 83 1.06448 123 0.33246
428.3459 44 4.38736 84 1.03069 124 0.32390
5 26.8778 45 4.21263 85 0.99815 125 0.31559
6 25.4954 46 4.04589 86 0.96681 126 0.30754
724.1932 47 3.88673 87 0.93662 127 0.29974
8 22.5662 48 3.73476 88 0.90753 128 0.29216
9 21.8094 49 3.58962 89 0.87950 129 0.28482
10 20.7184 50 3.45097 90 0.85248 130 0.27770
11 19.6891 51 3.31847 91 0.82643 131 0.27078
12 18.7177 52 3.19183 92 0.80132 132 0.26408
13 17.8005 53 3.07075 93 0.77709 133 0.25757
14 16.9341 54 2.95896 94 0.75373 134 0.25125
15 16.1156 55 2.84421 95 0.73119 135 0.24512
16 15.3418 56 2.73823 96 0.70944 136 0.23916
17 14.6181 57 2.63682 97 0.68844 137 0.23338
18 13.9180 58 2.53973 98 0.66818 138 0.22776
19 13.2631 59 2.44677 99 0.64862 139 0.22231
www.systemair.com
Systemair GmbH ·May 2017
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