Page 21
Calorex Heat Pumps Ltd. · The Causeway, Maldon, Essex CM9 4XD, UK · Tel: +44 (0)1621 857 171
Installation Manual
AW629/829AL
R
Fault light
2. Water leaks
Defrost light
a) Check that the heat pump is installed such that exhausted cold air leaving the
heat pump can not recirculate back into the heat pump air inlet. This can be
checked by measuring the air temperature at the point where it enters the heat
pump and comparing this to the actual ambient air temperature. They should be
the same. If the temperature of the air entering the heat pump is lower,
recirculation is occurring. This will cause premature defrosting and poor
performance.
b) Check that the airflow is not restricted by nearby obstructions, that the air inlet
is free from debris and that the evaporator coil is clean. If dirty, clean with a soft
brush. Greasy debris can be removed with a mild chemical cleaner and pressure
washer.
The AMBER fault light will illuminate if:
a) The heat pump has lost its refrigerant gas. This can be checked by measuring
continuity across the low pressure switch (see manual for details of pressure
switch position). If the heat pump has lost its gas a specialist refrigeration
technician should investigate further.
b)
When fitted with a soft-start, if the soft-start cut-out has activated.
a) If the RED mains light is illuminated but the digital display is off, check the
3 amp control fuse (single phase units) or control circuit breaker (three phase
units) in the electric box.
b) Check external devices connected to the interlock. Examples of these
devices are an external time clock or volt free terminals on the filter pump
contactor, which would be wired across the terminals labelled as “interlock” on
the terminal block in the heat pump electric box. These devices can
intentionally prevent the heat pump from operating.
c) Check thermostat set point is higher than the measured water temperature.
If the thermostat is not satisfied with the temperature, the red LED above the
label “Out” on the digital display will be illuminated.
d) If the compressor attempts to start then stops very quickly, it is possible
that the power supply to the heat pump is delivering inadequate voltage. This
could be caused by either an inadequately sized cable or general problems
with the voltage supply on site.
A swimming pool heat pump condenses water vapour from the atmosphere
during operation. This condensate is collected in a drip tray at the base of the
heat pump, from where it drains through a condensate connection on the side
of the machine, which should be connected to a waste pipe to be discharge
into a drain. If either the pipe or connector becomes blocked with dirt, conden-
sate will overflow from the internal tray and leak from the base of the heat
pump, rather than falling away to waste. In this case the pipe and connector
should be cleaned.
I
ndication lights correct,
but no operation