8
VMIFB202
Blocked strainer on the brine circuit.
Action:
Check for brine in strainer (if necessary clean the strainer)
Closed taps, main tap or filler cock on the brine circuit
Action:
Check that all taps are open, if not open them
Air in the brine circuit
Action:
Start the brine pump in manual mode and listen for air in both the brine circuit and the heat pump.
If necessary, bleed according to the installation instructions
The circulation pump for the brine circuit is defective or has jammed
Action:
Check if the circulation pump has jammed
Check the 230V signal
Measure the 0-10V signal while running the pump in manual test (only applies to optimum)
Cable break or loose cable to low pressure switch
Action:
Check that both the cables are connected to the low pressure switch. If yes, use a buzzer to check for cable breaks.
(disconnect the cables from the low pressure switch and relay card to do this).
The low pressure switch opens too soon
Action:
Check that the low pressure switch opens at the right pressure (done with a manometer apparatus) It varies depending
on the refrigerant and model year) see installation instructions.
Incorrect type of anti-freeze or incorrectly mixed
Action:
Check that the correct type of anti-freeze is used.
Measure the frost protection using a refractometer
For the Atria model it is very important that the ethylene glycol used for the cooling system is mixed for -32°C +/- 1°C.
If when measuring the frost protection it should be above or below the guidelines,
It is necessary to mix in an external reservoir of the filler barrel type.
This is because brine has particular difficulty in mixing with ethylene glycol.
Note! Bear in mind that if one uses the same barrel for ethanol and ethylene glycol it must be rinsed well so that there is no residue left
in the barrel and filler pump.
Troubleshooting Guide
Alarm low pressure
