Heat mode can
’
t change to DHW mode immediately
Volume of tank is too small and
the location of water
temperature probe not high
enough
Set dT1s5 to 20, and set t_DHWHP_RESTRICT to minimum value.
Set dT1SH to 2.
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 fullfilled, the
heat pump will turn on.
If both TBH and AHS are not available, try to change the postion of T5 probe
Space heating capacity shortage at low outdoor temperatures
Backup heater operation is not
activated.
Check that the "OTHER HEATING SOURCE/ BACKUP HEATER"is enabled, see chapter 9 Start-up
and configuration - OTHER HEATING SOURCE.
Check whether or not the thermal protector of the backup heater has been activated (see chapter to
Electronic board layout - main control board to thermal protector of the backup heater for location of
the reset button).
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.
DHW mode can
’
t change to Heat mode immediately
Heat exchanger for space
heating not big enough
Set t_DHWHP_MAX to minimum value, the suggested value 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.
Space heating load is small
Normal , no need for heating
Disinfect function is enabled but
without TBH
Disable disinfect function
add TBH or AHS for DHW mode
Manual activation of the FAST
WATER function, after the hot
water meets the requirements,
the heat pump does not switch
to conditioning mode
Manual activation of the FAST WATER function
Ambient temperature is low,
AHS does not activate.
Set T4DHWMIN, suggested value ≥ -5 ° C
Set T4_TBH_ON, suggested value ≥ 5 ° C
DHW priority - DHW
If AHS or IBH are present, when the unit is not operating, IBH or AHS must operate in DHW
mode until the water temperature reaches the set temperature before entering heating mode.
Summary of Contents for WSAN-YMi 101
Page 1: ......
Page 18: ......
Page 35: ...Type 2 Type 2 Type 2 Type 2...
Page 84: ...Access by pwd is reserved to qualified personnel The parameters changes may cause malfunctions...
Page 103: ......
Page 104: ......
Page 105: ......
Page 106: ......
Page 127: ......