Technical data

31
A flashing error code may appear if there is a fault with the heat pump, the most common will be: -
(See Fault Finding Section 6 for further details)
5.4.1 To read flow temperatures and refrigerant pressures
Using the display it is possible to interrogate the heat pump to read flow temperatures and refrigerant
pressures.
To read flow temperatures and refrigerant pressures: -
1 Press and hold SEL until -/- is displayed
2 Press the UP arrow until -b- is displayed
3 Press SEL and b01 is displayed
4 Press SEL
5 Temperature of water returning from the underfloor is displayed = b01
6 Press SEL
7 Press the UP arrow once until b02 is displayed
8 Press SEL
9 Temperature of water returning from ground arrays is displayed = b02
10 Press SEL
11 Press the UP arrow once until b03 is displayed
12 Press SEL
13 Temperature of water going out to the ground arrays is displayed = b03
14 Press SEL
15 Press the UP arrow once until b04 is displayed
16 Press SEL
17 Refrigerant pressure (in Bar) is displayed = b04
18 Press SEL
19 Press PRG twice until S-P is displayed
20 Press and hold PRG until the display returns to normal
5.4.2 To change the heat pump return flow temperatures.
Heat pumps are generally controlled on the return temperature from the heating distribution system and
work on a temperature differential of approximately 5 degrees, i.e. if the return temperature set point is
Compressor running
Alarm Description
TP Low water pressure (ground or heating distribution)
HP High gas pressure caused by low or no flow on the heating distribution circuit.
LP Low gas pressure fault (can occur temporarily on first start up). Call Vent-Axia Technical
Department.
A1 Anti freeze alarm, ground getting too cold / insufficient anti freeze/ unit not
commissioned correctly/ low flow around ground array