All In One Heat Pump For Domestic Hot Water
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be higher than or equal to the exhaust high temperature protection value by 110
℃
for 10
consecutive seconds, an high exhaust temperature alarm occurs and the compressor stops. At this
time, controller shows high temperature fault alarm code "02E". When the exhaust temperature
drops back to 90
℃
, the alarm is released and the normal temperature control function is restored.
If high temperature fault protection appears 3 times within half an hour, the controller will lock the
protection. And the compressor will be locked in the shutdown protection state. At this time, only the
shutdown and restarting can unlock the compressor.
4.4, water flow failure (water cycle model):
After the circulating water pump starts, it detects that the water flow switch is in the off state for 10
seconds, then heat pump stops. At this time, the controller displays the water flow switch fault
alarm code “01E”.Periodically (1 minute) restarts the water pump and 10 seconds later, the flow
switch is detected. If water flow switch is closed, heat pump will goes to normal running. If the fault
occurs 3 times within 1 hour, the fault is locked and heat pump will not starts.
4.5, antifreeze protection (water cycle model):
When the controller is powered on, when the ambient temperature too low, it will enter the
antifreeze mode to prevent the circulation line or the water tank from freezing.
When the ambient temperature is ≤ 2
℃
, heat pump enters the first-class antifreeze. When the
circulating water pump continuously stops for more than 30 minutes, it starts for 60 seconds, then
repeats the cycle.
When the ambient temperature is ≤ 2
℃
, and the water tank temperature is ≤ 5
℃
, heat pump enters
the secondary anti-freeze protection, Heat pump automatically turned on for heating. When the
ambient temperature ≥ 4
℃
or the tank temperature ≥ 15
℃
,heat pump stops heating and exits the
secondary frost protection
4.6 low ambient temperature protection:
When the ambient temperature is ≤ -9
℃
, the compressor is prohibited from running. When the
ambient temperature is ≥ -7 °C, normal operation is resumed, This protection has no fault display.
4.7 water temperature too low protection at cooling mode(water cycle heat pump)
In the cooling mode with compressor running for 5 minutes, if detects that the outlet water
temperature is <5 °C for continuous 5 seconds, heat pump enters subcooling protection. The
compressor and the fan stop running, And the water pump operates normally. When the outlet water
temperature is detected to be ≥7 °C, heat pump exits the subcooling protection and enters normal
operation.
4.8, water temperature too high protection at heating mode (water cycle heat pump)
In the heating mode, after compressor running for 5 minutes, if the water temperature is detected by
continuous 5S ≥65 °C, it is judged that the outlet water temperature is too high. It will shutdown heat
pump for protection and when the outlet water temperature is detected to be ≤60 °C, the protection
is withdrawn.
4.9, temperature sensor failure:
Heat pump will stop once the water tank temperature sensor or outlet water temperature sensor or
ambient temperature sensor is faulty.
When absorb or exhaust or evaporator coil or water return temperature sensor is faulty, electric
heater is allowed to operate.
When the return water temperature sensor fails, the return pump is allowed to run (do not judge the