EN
36
PARAMETERS
SIGNIFICANCE
IN
Incoming water temperature
OUT
Outgoing water temperature
P1
Evaporator temperature
P2
Compressor inlet temperature
P3
Ambient temperature
P4
Compressor outlet temperature
P5
Spare
MAINTENANCE
REGULAR MAINTENANCE
1. Check the water flow in the system at regular intervals. If the
flow is too low this can damage the heat pump.
2. Check the filter at regular intervals, and clean if necessary.
3. Check at regular intervals that the installation area is still
clean and well ventilated and that the inlet and outlet
openings on the pump have not been blocked.
4. Clean the evaporator at regular intervals to maintain its
performance.
AUTOMATIC DEFROSTING
Defrosting starts when the pump has been running for 40
minutes (parameter 2) after the evaporator temperature Tp has
dropped below 13°C (parameter 4) and if Tp ≤ –7°C (parameter
3).
Conditions to end defrosting
The defrosting stops when Tp > 13°C (parameter 4) or when
defrosting has been in progress for eight minutes (parameter 5).
If there is a fault on the sensor for the evaporator temperature
an error code PP03 is shown on the control panel display and the
appliance switches to timed defrosting, with a fixed defrosting
time of six minutes. When the appliance has run for 40 minutes
(parameter 2) defrosting takes place for six minutes, and then stops.
Abnormal stop of defrosting
1. If the pump is switched off during defrosting the defrosting
will continue before it switches off.
2. The high pressure and low pressure relays are disconnected
during defrosting. The pressure in the high pressure and low
pressure circuits is checked when defrosting ends and the
pump returns to heating mode.
NOTE:
Do not change the defrosting parameters unless absolutely
necessary.
EVAPORATOR BATTERY
The evaporator battery does not require any special
maintenance apart from cleaning to remove debris and other
foreign objects that can obstruct the flow of air. Clean with
detergent and water and rinse with fresh water.
WARNING!
•
Switch off the pump before cleaning.
•
Internal cleaning of the pump must be carried out by an
authorised service representative or other qualified
personnel.
•
Do not use petrol, benzene, solvents etc. to clean. Do not
spray the pump with insect spray, this can damage it.
Special detergent for the air conditioning unit is
recommended.
•
Spray the evaporator battery with detergent for the air
conditioning unit. Allow to act for five to eight minutes.
•
Rinse the evaporator battery with clean water.
•
An old hair brush is suitable for brushing dirt and fluff off
the flanges. Brush the spaces between the flanges.
•
Wipe the pump with a soft, dry cloth after cleaning.
REFILLING REFRIGERANT
The pump is filled with refrigerant on delivery from the factory
and does not normally need to be refilled. The refrigerant is
chemically stable and does not decompose even during very
intense usage. Refilling is only necessary if there has been a
leak. Localise and repair the leak before refilling with refrigerant.
1. Refrigerant must only be refilled by an authorised service
technician.
2. The amount of refrigerant in the system can be checked by
reading off the pressure in the low pressure part.
3. The pressure in the low pressure part varies with the
ambient temperature and should in the summer be about
1.0 MPa and during the winter about 0.7 MPa. Refrigerant
needs to be refilled if the pump is not working properly and
the pressure in the low pressure part is too low.
WATER FLOW FAULT
A flow switch is as standard fitted in the water inlet to the
evaporator to ensure a sufficient flow of water through the
evaporator before the pump starts. The flow switch is activated
during partial blocking (formation of ice) and when the flow of
water is reduced as a result of a fault in the pump. This is the
most important safety device on the pump. The water module
does not require any special maintenance. Fitting a mesh filter
(sold separately) is strongly recommended.
MEASURES FOR RISK OF FROST/WINTER
CONDITIONS
At low ambient temperatures the system components must be
protected from freezing. Measures must be taken to prevent
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