25
Pre-Start-up
Make sure the water flow in the reasonable range ( 60%--130% rated water flow)
Before unit start-up or commissioning, set the functions and operating parameters according to
the following methods. The unit function setting is mainly defined through the jumper, the dial
switch and the system bit. The incorrect setting will cause the faulty operation of the unit and
even shutdown!
Jumper Setting
The jumper JP1 is used for software version control. If JP1 is unplugged, the software can be
downloaded; if JP1 is short-circuited, the system will normally operate.
Dial Switch Setting (N Type Unit)
The DIP switch SW1 is used for the centralized control of address bit coding and is used to set
the address of each unit on the networking control. The DIP switch SW2 is used to define the
main functions of the unit. The definition of each bit is shown in the following table, in which Bit4
only effective for the double-compressor unit.
Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8
Mode C/H Fan type EnSave Control
Mode:
00 Normal operating mode 01 Computer monitoring mode
10 System self-inspection and configuration mode 11 On-site commissioning mode
C/H:
0 "External cooling/heating switch" disabled 1 "External cooling/heating switch" enabled
Fan:
0 Single fan 1
Double fans
Type:
00 Heat pump+electrical heater 01
Cooling+electrical heater
10 Cooling+electrical heating 11
Cooling
EnSave:
0 Conventional 1
Two-way valve interlocking
Control:
0 Single-unit control 1
Module control
System Bit Setting (N Type Unit, Realized through Centralized
Controller or Single Unit Controller)
The system bit is one byte in the memory and can be set through the Single Unit Controller (the
password “55” shall be inputted), and each bit is defined as follows.
Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1
Temp Flow void Ambient Mode Defrost Pulse Auto
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