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INSTALLATION
PRIMO PILOT
MANUAL
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28
Display
Error
Possible causes / Repair
Consequences
Reset
cuto. hpre1
High pressure switch HP1
- Check status of the fi lter (clean the fi lter)
- Ensure that air has been correctly purged from the heating circuit
- Ensure that heat pump circulator is operating well
- The set temperature for heating during warmer months is too high
- Clean the plate heat exchanger input
- Problem with refrigerant fl uid load
- Cause could be a default on compressor check valve or on 4 ways
valve
Maintenance on fl uid circuit must be done by a qualifi ed engineer
heat pump stopped
manual
cuto. hpre2
High pressure switch HP2
- Check status of the fi lter (clean the fi lter)
- Ensure that air has been correctly purged from the heating circuit
- Ensure that heat pump circulator is operating well
- The set temperature for heating during warmer months is too high
- Clean the plate heat exchanger input
- Problem with refrigerant fl uid load
- Cause could be a default on compressor check valve or on 4 ways
valve
Maintenance on fl uid circuit must be done by a qualifi ed engineer
heat pump stopped
manual
t cy lind
Tank sensor out of place
The water sensor is out of place in the tank, or it is placed too low
in the tank (placed below the heat exchanger or near the cold water
inlet)
DHW circuit stopped
manual
cp1 senso.
T1 defect
Defect of incorrect connection of the temperature sensor for
the compressor – or compressor n°1 depending on the model
(connector TCP1 on the HP)
heat pump stopped automatic after repair
cp2 senso.
T2 defect
Defect of incorrect connection of the temperature sensor for
compressor n°2 (TCP2)
heat pump stopped automatic after repair
T
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wa ter
Tballon defect
Defect of incorrect connection of the temperature sensor for the
DHW tank (terminal «Bal»)
DHW circuit stopped automatic after repair
T
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flow
TsPAC defect
Defect of incorrect connection of the temperature sensor at the
heat pump outlet (TwOUT)
heat pump stopped automatic after repair
T
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PI LOTE
TsEAU defect
Defect of incorrect connection of the temperature sensor of the
pilot
back-up stopped
automatic after repair
T
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PI LOTE
diag
Overheating at pilot outlet
- Check the good operation of circulators 1 and 2 (option)
- Check the good operation of the electric back-up power relays
- Check the status of the signal piloting the back-up boiler
- insuffi
cient fl ow rate to irrigate the pilot
back-up stopped
automatic
T
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PI LOTE
err
Multiple overheatings at pilot
outlet
- insuffi
cient fl ow rate to irrigate the pilot
back-up stopped
manual
T
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RE Turn
TePAC defect
Defect of incorrect connection of the temperature sensor at the
heat pump inlet (TwIN)
heat pump stopped automatic after repair
