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NO.
1
CN140:Power supply,220-240VAC input
2
CN115:W-HEAT,Electric heater of water flow switch
3
CN125:Three-way valve(hot-water valve,reserve)
4
CN123:Pump(220-240V control power supply )
1）After receiving start-up instruction, the pump will be started up instantly, and will maintain start-up state always
in the process of operation.
2）In case of refrigerating or heating shutdown, the pump will be shut down 2 minutes after all modules stop
operating.
3）In case of shutdown under the pump mode, the pump can be directly shut down.
5
CN121:COMP-STATE,connect with an ac light to indicate the state of the compressor
Attention: the control port value of the COMP-STATE actually detected is ON/OFF but not 220-240V control power
supply，so special attention should be paid when installing the light.
CN119:
6
HEAT1.Pipeline Auxiliary Heater
Attention: the control port value of the HEAT1 actually detected is ON/OFF but not 220-240V control power supply，so
special attention should be paid when installing the pipeline auxiliary heater.
7
CN108:Inverter pump 0-10V output control singnal
8
CN110:W.P-SW,Water pressure switching port.
TEMP-SW,Target water temperature switching port.
9
CN138:COOL/HEAT,Remote function of cool/heat signal
ON/OFF,Remote function of on/off signal
CN114:Water flow switch signal
10
CN105:Taf1:Water side antifreeze temperature(reserve)
11
CN101:Tw:Total water outlet temperature sensor when several units are connected in parallel
12
CN103:T5:Water tank temperature sensor (reserve)
13
14
CN300:Program burn in port(WizPro200RS programming device).
15
CN109:Conmunicate with main board
Faults
When the main unit suffers faults, the main unit stops operating, and all other units also stop running;
When the subordinate unit suffers faults, only the unit stops operating, and other units are not affected.
Protection
When the main unit is under protection, only the unit stops operating, and other units keep running;
When the subordinate unit is under protection, only the unit stops operating, and other units are not affected.
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Fig. 8-10 Slave board of SCV-750EB and SCV-1400EB
Detail information
CAUTION
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