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INSTALLATION
PRIMO PILOT
MANUAL
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25
7.2.7 - Errors indicated by the pilot
Press
to stop the sound (the error persists)
Display
Error
Possible causes / Repair
Consequences
Reset
AIR hp
T_air error
The heat pump temperature sensor (Tair) is defective or not
connected properly
- Check the sensor cable and its connector
- Measure ohmic value of the sensor
- Replace the sensor if default is confi rmed
heat pump stopped automatic after repair
CIRC pump
Power cable or PWM
circulator cable error
The cables for the circulator (DHW/HP) are defective or not
connected properly
- Check connection of the signal (PWM) cable to the circulator
- Check connection of the power cable to the circulator
complete stop
manual
HEAT CIR
Power cable or PWM
circulator cable error
The cables for the circulator pump (heating) are defective or not
connected properly.
- Check connection of the signal (PWM) cable to the circulator
- Check connection of the power cable to the circulator
- If installation has an underfl oor circuit, check a possible power
cut from the underfl oor safety device (Overheating Protection
Thermostat)
complete stop
manual
AMBI eNCE
Amb error
The ambient temperature sensor is defective
(error when measuring the ambient temperature)
heating circuit
stopped
automatic after repair
BLOc. Circ
Circulator pump blocked
The circulator (heating/water) is blocked or is working with a load
loss which is too high
- Ensure that all valves in the circuit are open
- Check status of the fi lter
- Remove default and check that circulating pump is running by
inserting a screwdriver in the central hole of the circulating pump
motor box
complete stop
manual
BUS
BUS
BUS communication error
- Check the good connection of the bus cable between heat pump
and pilot
- Ensure that bus cable stays always far from power cables or
any other potential source of disturbance (neon tubes, home
appliances, etc...)
complete stop
automatic after repair
amb bus
Amb BUS error
The ambient temperature sensor («Amb» terminals on the pilot) is
defective or not connected properly
heating circuit
stopped
automatic after repair
cond. senso
diag
Condenser fl uid pressure
sensor error
The refrigerant circuit pressure sensor is defective or not connected
properly
operation in
downgraded mode
automatic after repair
evap. senso
Evaporator fl uid pressure
sensor error
The refrigerant circuit pressure sensor is defective or not connected
properly
heat pump stopped automatic after repair
pres, senso
Pressure sensor error
The heating water pressure sensor is defective or not connected
properly
complete stop
automatic after repair
invr. comm.
Inverter communication error
HP circuit board is disconnected or defective
- Check the internal wiring of heat pump
heat pump stopped
manual
CP CTRL
Loss of control of inverter
Error detected by the HP circuit board
- Wait around 20 minutes before quitting default mode. Pick-up a
new USB fi le from pilot if default repeats
heat pump stopped
manual
CP ELEC
Inverter having electrical
problems
Error detected by the HP circuit board
- Wait around 20 minutes before quitting default mode. Pick-up a
new USB fi le from pilot if default repeats
heat pump stopped
manual
CP MECA
Inverter having mechanical
problems
Error detected by the HP circuit board
- Wait around 20 minutes before quitting default mode. Pick-up a
new USB fi le from pilot if default repeats
heat pump stopped
manual
CP THERM
Inverter having thermal
problems
Error detected by the HP circuit board
- Wait around 20 minutes before quitting default mode. Pick-up a
new USB fi le from pilot if default repeats
heat pump stopped
manual
CP1 ovrht.
ERR
Multiple overheatings on
compressor 1
- The set temperature for heating during warmer months is too high
- Problem with refrigerant fl uid load
heat pump stopped
manual
CP2 ovrht.
ERR
Multiple overheatings on
compressor 2
- The set temperature for heating during warmer months is too high
- Problem with refrigerant fl uid load
heat pump stopped
manual
