33
Controller
Operation and display panel
Control panel
1. On/Off button
2. Mode button, controlling refrigeration and heating. Mode setting must be carried out in a
shutdown state.
3. Fault resetting button, pressed for manual resetting when a failure alarm is given.
4. Parameter setting button, pressed to perform parameter setting (password is necessary).
5. Time browse/setting/timing setting button, specifying timed on/off time as 00:00-23:59.
6. Timing function option button
7. Setting button, the two buttons are pressed to examine or modify parameter setting.
Display panel
8. Defrost display
9. Water pump start display
10. Antifreezing function start display
11. Second compressor start display
12. Electric heater start display
13. Water chiller heating display
14. First compressor start display
15. Water chiller refrigeration display
16. Temperature or parameter display window
Operation instructions
1. On/off operation
Firstly choose the wanted mode, then press the key to run this mode, and again press the key to
close the system.
Frequent on/off operation is strictly prohibited.
2. Mode selection
The modes of refrigeration and heating must be set in a shutdown state.
3. Parameter browse
Parameters to be browsed cover refrigerating return water temperature, heating return water
temperature, winter antifreezing temperature, defrost interval and running time of defrost. By double
control of the key, the five parameters can be browsed.
4. Outlet water temperature display
When the system is on, upon pressure of the mode key, the LCD displays outlet water temperature
for 6 seconds by flashing.
5. Fault resetting operation
When the system is out of order, an alarm sounds for 2 seconds with backlight flashing. Press the
key to remove the failure and stop alarming. If the failure cannot be removed, the alarm continues to
sound for 2S with backlight flashing.
6. Parameter setup
Parameter setting refers to separate setting of the above five parameters according to user
requirements. "
、
" key is involved. It functions as increase and decease.
7. Normal state display
In a power-on state, current return water temperature, as well as working conditions of compressor,
heater and water pump, is displayed. In a timed state, ON lights for timed start, and OFF lights for
timed shutdown. The five parameters can be set in a shutdown state. If no key is in service, normal
state display will be restored in 10S, with backlight stopped in 15S. Backlight flashes upon failed
communication.
