User`s guide

Page 33
Section 11: Trouble shooting for the installer
Symptom
Cause
Heat pump emits mist
 This is normal during certain atmospheric conditions
because the drop in air temperature caused by the
heat pump is cold enough for mist to form.
Heat pump does not operate
 If the external temperature is above the HEAT OFF (in
advanced settings menu) the heat pump will not
operate.
 If the water inlet temperature is lower than 20°C the
inline flow boiler will activate to raise the temperature.
Property does not heat-up enough
 Heat pump undersized for the heat demand of the
property at low external temperatures.
 Water flow temperature is set too low for the heat
emitters installed.
Property does not heat up quickly
 Heat pumps are designed for continuous operation
and there is typically not a large overload factor to
heat the building quickly. The property temperature
should not be allowed to significantly drop during
periods of cold weather.
System is noisy during operation
 Check the unit is not installed on an incline
 Check the covers are closed correctly.
The controller is blank
 Check the circuit breaker to the heat pump.
The hot water cylinder is cold
 Check that the controller is in TANK mode
The hot water cylinder is not hot
enough
 Check that the coil is correctly sized for the heat
pumps output.
 Check that the temperature setting within the
controller is set to 45C.
Ice has formed on the heat pump
 Ice formation on the evaporator is normal during cold
weather. The defrost function should keep the majority
of the coil clear of ice to allow adequate air flow.
Typically if the ice is less than 1cm thick and the
controller does not show a fault the system is
operating correctly.