Cooper & Hunter CH-CH10SNM, Service Manual

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12
Mini Chiller
Service Manual
CONTROL
2.2 Heating Mode
When pressing ON button, if the outdoor temperature is below 28
℃
, the water pump will start first .After
30s, if the outlet water temperature meets the heating running requirements, the fans of outdoor unit will start.
Then the compressor will run in 15s. During the period of cooling, the unit will be turned off if the outlet water
temperature meets the stopping requirements and the running time of compressor is over the shortest running
time required. The fans of outdoor unit will stop in15s.
If the outdoor temperature is over 28
℃
, the unit will stop, and all loads except the water pump will be turned off.
2.3 Defrosting Mode
The condition of start defrosting mode:
Under heating mode, if the accumulative running time of compressor is over the set interval time of
defrosting(default 45min), and the defrosting temperature is lower than the set starting temperature (default -4
℃
) ,the
unit will start running defrosting mode, and the 4-way valve will shut off and the outdoor fan will stop after 2s.
The condition of quit defrosting mode:
Under defrosting mode, if the continual defrosting time is over the set continual time of defrosting (default 8min),
and the defrosting temperature is over the set stopping temperature(default 20
℃
), the unit will restart running heating
mode, and the 4-way valve will turn on and the outdoor fan will run.