SYSHP MINI EVO P – Installation Operation Manual (IOM SYSHP MINI EVO P S 1GB)

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Symptom 6: Space heating capacity shortage at low outdoor temperatures
POSSIBLE CAUSES CORRECTIVE ACTION
Backup heater operation
is not activated.
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.
• Check if that the "OTHER HEATING SOURCE/ IBH FUNCTION" is
enabled.
• Check whether or not the thermal protector of the backup heater has been
activated.
• Check if booster heater is running, the backup heater and booster heater
can’t operate simultaneously.
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 maximum valve, and set "t_DHWHP_RESTRICT" to
minimum valve.
• Set dT1SH to 2°C.
• Enable TBH, and TBH should be controled by the outdoor unit.
• If AHS is available, turn on first, if requirement for
turn heat pump on is fullfilled, the heat pump will turn on.
• If both TBH and AHS are not available, try to change the postion
of T5 probe(refer to 2 "General introduction").
Symptom 8: DHW mode can’t change to Heat mode immediately
POSSIBLE CAUSES CORRECTIVE ACTION
Heat exchanger for space
heating not big enough
Space heating load is small
When the ambient temperature is
low, the hot water is not enough
and the AHS is not operated or
operated late
DHW mode priority
Manual turn on the FAST WATER
function, after the hot water meets
the requirements, the heat pump
fails to switch to the air-conditioning
mode in time when the air
conditioner is in demand
Disinfect function is
enabled but without TBH
Normal , no need for heating
Manual turn off the FAST WATER function
If there is AHS or IBH connect to the unit, when the outdoor unit failed, the
hydraulic module board must run DHW mode till the water temperature
reach the setting temperature before change to heating mode.
• Disable disinfect function
• Add TBH or AHS for DHW mode
• Set "T4DHWMIN", the suggested valve is ≥ -5℃
• Set "T4_TBH_ON", the suggested valve is ≥ 5℃
• Set "t_DHWHP_MAX" to minimum valve, the suggested valve is
60min.
• If circulating pump out of unit is not controlled by unit, try to
connect it to the unit.
• Add 3-way valve at the inlet of fan coil to ensure enough water
flow.
Symptom 9: DHW mode heat pump stop work but setpoint not reached, space heating require heat but unit stay in DHW mode
POSSIBLE CAUSES
CORRECTIVE ACTION
Surface of coil in the tank
not large enough
The same solution for Symptom 7
TBH or AHS not available
•
Check whether IBH(AHS or TBH) is set valid in "FOR SERVICEMAN" or
whether IBH is set valid by DIP switch on the main control board of
hydraulic module.
• Check whether IBH(AHS or TBH) is damaged.