EN
37
the formation of ice in the event of a power failure. Switch off
the pump and drain off all the water if the pump is not going to
be used for some time, for example during the winter (outdoor
temperature below 0°C).
FIG. 40
COOLING MODE
In cooling mode the set point temperature for the inlet water
(set point T, cooling) is as standard set to 12°C, but can be set in
the interval of 8 to 28°C. When T, in > set point T, c 2°C
the pump starts cooling. The pump stops cooling when T, in ≤ set
point T, cooling.
HEATING MODE
In heating mode the set point temperature for the inlet water (set
point T, heating) is as standard set to 40°C, but can be set in the
interval of 15 to 40°C. When T, in < set point T, heating - 2°C the
pump starts heating. The pump stops heating when T, in ≥ set
point T, heating.
AUTO MODE
In auto mode the set point temperature for the inlet water (set
point T, auto) is as standard set to 40°C, but can be set in the
interval of 8 to 60°C.
Function in auto mode
– The pump automatically selects whether cooling mode
or heating mode is to be used on the basis of the
temperature of the ingoing water T, in and the set point
temperature set point T, auto.
– The pump switches from cooling mode to heating
mode when T, in < set point T, auto – 1°C.
– The pump switches from heating mode to cooling
mode when T, in < set point T, auto – +1°C.
NOTE:
The temperature of the ingoing water is maintained to the set
point temperature within approx. ±1°C.
MODE SEQUENCE OF MAIN COMPONENTS
Compressor
In a 1 compressor system the compressor does not restart
until after a 3 minute delay and 5 minutes after the previous
compressor start.
Fan motor
• The fan motor starts and stops at the same time as the
compressor.
• The fan motor stops during defrosting.
Water pump
• The system first starts the water pump and then the
compressor.
• When the system is switched off the compressor stops first
and then the water pump.
• The water pump is on during defrosting.
Base plate heater
• The base plate heater starts if the pump is in heating mode
and the ambient temperature is less than 4°C.
• When the ambient temperature e4°C, or if the
ambient temperature sensor stops working, the base plate
heater switches off.
• The base plate heater always starts when defrosting starts.
TROUBLESHOOTING
INSUFFICIENT HEATING
• First check the ambient temperature and the temperature of
the water and read off in the performance diagram which
heating factor should be reached in the present conditions.
On this basis determine if there is an actual reduction in
performance.
• Check that the flow of air through the pump has not been
blocked, and when appropriate remove the blockage.
• Check that the mains voltage is correct and that there is
enough refrigerant. If there is not enough refrigerant,
contact an authorised service centre to repair the leak and
refill the refrigerant.
DEFROSTNING DOES NOT START WHEN THE
EVAPORATOR IS COVERED WITH ICE
Check that the evaporator temperature sensor, the 4-way valve
and control panel or control unit are correctly connected and
working. Replace the components if they are defective.
ABNORMAL NOISE
• Check that the installation is in good order and that the
vibration damping rubber underlays are in place.
• Check that the rubber packing between the fan and front
panel is in place.
• Check that the water circulation system is working properly.
Summary of Contents for 416102
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