Kaysun Aquantia KHPS-MO Series, Инструкция по установке и эксплуатации, Страница: 73 / 92

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Symptom 4: The water pressure relief valve opens
POSSIBLE CAUSES CORRECTIVE ACTION
The expansion vessel is broken. Replace the expansion vessel.
The filling water pressure in the
installation is higher than 0.3MPa.
Make sure that the filling water pressure in the installation is about
0.15~0.20MPa (refer to "9.3 water piping/Checking the water volume and
expansion vessel pre-pressure").
Symptom 5: The water pressure relief valve leaks
POSSIBLE CAUSES CORRECTIVE ACTION
Dirt is blocking the water pressure relief
valve outlet.
Check for correct operation of the pressure relief valve by turning the red
knob on the valve counter clockwise:
• If you do not hear a clacking sound, contact your local dealer.
• In case the water keeps running out of the unit, close both the water inlet
and outlet shut-off valves first and then contact your local dealer.
Symptom 6: Space heating capacity shortage at low outdoor temperatures
POSSIBLE CAUSES CORRECTIVE ACTION
Backup heater operation is not
activated.
Check that the "OTHER HEATING SOURCE/ BACKUP HEATER" is enabled,
see "10.7 Field settings" Check whether or not the thermal protector of
the backup heater has been activated (refer to "Controls parts for backup
heater(IBH) " ). Check if booster heater is running, the backup heater and
booster heater can't operate simultaneously.
Too much heat pump capacity is used
for heating domestic hot water (applies
only to installations with a domestic hot
water tank).
Check that the "t_DHWHP_MAX" and "t_DHWHP_RESTRICT" are
configured appropriately:
• Make sure that the "DHW PRIORITY" in the user interface is disabled.
• Enable the "T4_TBH_ON" in the user interface/FOR SERVICEMAN to
activate the booster heater for domestic water heating.
Symptom 7: Heat mode can't change to DHW mode immediately
POSSIBLE CAUSES CORRECTIVE ACTION
Volume of tank is too small and the
location of water temperature probe not
high enough
• Set "dT1S5" to 20°C, and set "t_DHWHP_RESTRICT" to minimum value.
• Set dT1SH to 2°C.
• Enable TBH, and TBH should be controled by the outdoor unit.
• If AHS(boiler) is available, turn boiler on first, if requirement for turn heat
pump on is fulfilled, the heat pump will turn on.
• If both TBH and AHS are not available, try to change the potion of T5
probe(refer to 2 General information/Domestic hot water tank).