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7. Repairs
7.3 List of faults
Code
Anomalies
Causes possibles
Actions
P03
Flow sensor malfunction
Insufficient water in heat exchanger
Check your water circuit operation and the opening of the By-Pass
valves
Sensor disconnected or defective
Reconnect or replace sensor
P04
Antifreeze protection
Protection activated when the ambient temperature is too low and
the unit is on standby
No intervention is necessary
P05
P06
High or low pressure protection
Insufficient water flow
Check water pump operation and openings of By-Pass inlet/outlet
valves
Excess refrigerant gas
Readjust the refrigerant volume
Defective 4-way valve
Replace the 4-way valve
High pressure switch disconnected or defective
Reconnect or replace high pressure switch
P09
Connection problem between PCB and wired
remote control
Bad connection
Check wiring connections between remote control and PCB
Defective wired remote control
Replace remote control
Defective PCB
Replace PCB
P10
Connection problem between PCB and inverter
module
Bad connection
Check wiring connections between PCB and inverter module
Defective inverter module
Replace inverter module
Defective PCB
Replace PCB
P12
Vented air temperature too high
Insufficient refrigerant gas
Readjust the refrigerant volume
P15
Water intake temperature sensor malfunction
Sensor disconnected or defective
Reconnect or replace sensor
P16
Outside coil temperature error
Sensor disconnected or defective
Reconnect or replace sensor
P18
Vented temperature error
Sensor disconnected or defective
Reconnect or replace sensor
P20
Inverter module protection
See chapter Appendices
P21
Ambient temperature error
Sensor disconnected or defective
Reconnect or replace sensor
P23
Water temperature at outlet too low for cooling
mode
Insufficient water flow
Check water pump operation and openings of By-Pass inlet/outlet
valves
P27
Water outlet error
Sensor disconnected or defective
Reconnect or replace sensor
P29
Backed temperature error
Sensor disconnected or defective
Reconnect or replace sensor
P32
Outlet temperature too high for heating mode
protection
Insufficient water flow
Check water pump operation and openings of By-Pass inlet/outlet
valves
P33
Coil temp too high (higher than 60°C) for cooling
mode protection
Refrigerant overcharged
Readjust the refrigerant volume
Fan motor doesn’t work or air outlet blocked
Check the fan is working properly and the air inlet is unobstructed
P42
Inside coil temperature error
Sensor disconnected or defective
Reconnect or replace sensor
P46
DC fan motor malfunction
Bad wire connection
Reconnect the fan
Fan motor is defective
Replace the fan motor
8. Recycling
