HAIER CHILLER
1
5
b. The driving wiring diagram
c. The communication wiring diagram
9. Auxiliary electric heating function control
The auxiliary electric heating function will be performed in low ambient temperature. Connect the water
inlet/outlet pipe with auxiliary electric heater to the total water inlet/outlet pipe, in the electric control box of
the master module, there is the control port of auxiliary electric heating (only with 220V output, not supply
the electric heating control part).
10. Water pump operation control
(valid when water pump and the unit controlled
simultaneously)
In the electric control box, there is the freezed water pump simultaneous control port (only with 220V
output, not supply the water pump control part). When the unit is in standby state, water pump will not start
up; when the unit enters working state from standby state, start up water pump firstly; when the unit enters
standby state from working state or stop state, 30seconds later, water pump will stop automatically. In stop
state, when water outlet temp. is no more than 3 degree and more than 2 degree, the water pump will start
up; when water outlet temp. is no more than 2 degree, start up one module in heating and stop until water
temp. arrives 8 degree.
slave
unit 15
slave
unit 1
master
circuit
breaker
circuit
breaker
circuit
breaker
12V
G ND A
A B
G ND
C N 102A C O M M
N o.n slave
unit PC B
B
A B
…
12V
B
G ND
G ND A
N o.1 slave
unit PC B
C N 102A C O M M
A B
B
A
12V
G N D
m ain unit PC B
C N 102A C O M M
G N D
M C U
