19
Inlet water/outlet water temperature
too high protection
Please check if the inlet/outlet water temperature >
Parameter P10 in heating mode
Under cooling mode the outlet water
temperature too low protection
Please check if the water outlet temperature <5
Inlet and outlet water temperature
difference too large protection
Please check if the water flow enough
inlet and
outlet water temperature difference >13
Suction temperature sensor fault
Please check if the suction temperature
sensor short circuit or disconnect.
E19
E19
E21
E21
E22
E22
E23
E23
Cold coil temperature sensor fault
Please check if the cold coil temperature
sensor short circuit or disconnect.
E20
E20
Freezing protection
E24
E24
The system recover automatically
after running antifreeze process.
E15
E15
1. Check the unit, to see if there is leak of refrigerant;
Check if the pressure of the system too low when
the unit is running.
2. Repairing the leak and vacuumize the system,
pls refill the refrigerant.
System low pressure protection
The system's low pressure is open
Malfunction
Reason
Solution
Unit does
not work
1.Power failure
2.Loose power wire connection
3.Fuse of controller burn-out
1.Turn off power and inspect power supply
2.Identify the cause and rectify
3.Identify the cause and replace with new fuse
The pump is
operating, but
water isn't
circulatory or the
noise of pump is
too loud
1.Shortage of water or air in the water
system
2.Water pump damage
3.Water supply valve not fully open
4.Water filter is blocked
1.Check water supply equipment and replenish
water remove the air of the water system
2.Change anther pump.
3.Open the valve of the water system
4.Clean the water filter and the pump
Unit heating
capacity is low or
compressor
working too long
1.Shortage of refrigerant or leakage
2.Poor thermal insulation of water system
3.Poor air flow into the air heat exchanger
4.Shortage of water flow
1.Check the system for leakage, fix leak and re-gas
2.Improve thermal insulation of the system pipeline
3.Clean the fin coil with water and improve air flow
4.Check the line strainer on the water inlet and
clean it
Compressor
discharge pressure
too high
1. Water pump is not working
2. There is air in the water system
3. Excessive refrigerant (from repair /
re-gas)
4.Heat exchanger not working properly
1. Check / fix power supply to the water pump
2. Open hot water taps, run water until all air
expelled
3. Call refrigeration mechanic to reduce
refrigerant
4. Call Siddons Service Centre
3. Judgement and solution of malfunctions
Compressor will
not turn on
1.Power failure
2.Compressor contactor malfunctions
3.Loose connection
4.Overload protection of compressor
activates
5.Incorrect setting of the return water
temperature in the water tank
1.Check the power supply and restore
2.Replace the contactor
3.Check for loose wires and re-connect
4.Check that the current / Amp draw of
compressor is within specification, may
require replacement of the compressor
5.Reset the return water temperature
Compressor
suction pressure
too low
1.Shortage of refrigerant or leakage
2.Filter or capillary blocked
3.Poor condenser heat dissipation
1.Call refrigeration mechanic to check the
system for eakage, fix the leak and re-gas the
heat pump
2.Replace capillary tube or filter
3.Clean the heat exchanger.
Содержание SunPump MACHRW010W
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