Grant Aerona 3 HPID10R32, Instructions Manual, Page: 49 / 100

Page 49 Section 10: Servicing
10.1 GENERAL
Grant Aerona³ Heat Pumps require only the minimum of routine
servicing and maintenance.
This should be carried out on an annual basis and consist of the
following:
10.1.1 HEAT PUMP
Check the following:
• Visual condition of the heat pump
• Any obstructions to airflow into the ASHP – remove if found
• The fan outlet is not obstructed - remove obstructions if found
• Condensate drain opening is clear
• Flexible hose condition
• Pipe insulation condition
• Remote controller settings
• There are no refrigerant leaks. Refer to Section 10.6.
• All electrical connections and PCB for scorching or dry cables
Clean the evaporator
Carefully remove any dirt or debris from the evaporator fins using
either a soft brush or by gently vacuuming. Take care not to damage
the fins during this manual cleaning process.
Wash the evaporator with a neutral detergent cleaner, e.g.
EnviroCoil, using a low-pressure spray.
Do NOT use a pressure washer to clean the evaporator fins as this
may damage them.
Do NOT use any aggressive cleaning agents as these will attack
and damage the aluminium fins.
10.1.2 HEATING SYSTEM
Check the following:
• Expansion vessel pressure
• Operation of pressure relief valve
• Heating system pressure – top up if necessary
• Correct concentration of corrosion/antifreeze protection
• Heating and hot water controls settings
• Any leaks on system
• Magnetic filter is cleaned
10.1.3 MASTER RESET (RESETTING ALL PARAMETERS
TO THEIR DEFAULTS)
All parameters can be reset to their original defaults. The procedure
is as follows:
1. Press the Menu
l
and the – and +
o
buttons on the remote
controller simultaneously for three seconds to enter the
installer level.
2. Press and hold the low tariff/night mode (key lock)
m
button for
ten seconds. All parameters will now be reset.
3. To return to normal operation, press and hold the Menu
l
and
the – and +
o
buttons simultaneously for three seconds, or
simply leave the remote controller for ten minutes.
10 Servicing
10.2 AIR INLET AND OUTLET
The air inlet grille and evaporator must be checked and leaves or
any other debris removed from the space between the grille and the
evaporator fins.
! CAUTION !
Take care not to damage or distort the Aluminium fins of the
evaporator when removing any debris.
Ensure that both the air inlet to the evaporator and the discharge
from the fan outlet are unobstructed. Any foliage, plants, etc. near
the heat pump must not be allowed to grow over the heat pump.
Under no circumstances should anything be stacked on or against
the heat pump.
Refer to Section 3.5.2 for the required clearances around the heat
pump.
10.3 CONDENSATE DISPOSAL
Check that the condensate drain hole in the bottom of the heat
pump is not blocked.
10.4 HEATING SYSTEM CONNECTIONS
Check the condition of the flexible hoses. Replace if damaged or
leaking.
10.5 HEAT PUMP CONTROLS
Check that settings on the remote controller are as set when
commissioned. Refer to settings given in the relevant sections of
these instructions. Reset to commissioned settings if necessary.
10.6 REFRIGERANT
Under no circumstances should the refrigerant be vented from the
charging points on the refrigerant circuit of the heat pump.
If any work is required to be carried out on the refrigerant circuit, it
MUST be undertaken by an F-gas registered refrigeration engineer
On no account should any such work be carried out by unqualified
personnel.