75
List of error codes
7.2
Swimming pool heat pump
Code Fault
Possible
causes
Troubleshooting
P3
P4
P1
P7
P2
P8
PC
E4
P9
PL
P6
E3
E6
E8
Malfunction of temperature
sensor at water intake
Malfunction of temperature
sensor at water outlet
Malfunction of temperature
sens
or for de-icing
Malfunction of external tem-
perature sensor
Malfunction of sensor at air
outlet
Same causes as P3
Same measures as P3
1. Sensor badly connected
2. Sensor defective
3. PCB defective
1. Reconnect sensor
2. Replace sensor
3. Replace PCB
Water temperature at outlet
too low for cooling mode
1. Flow rate too low
2. Water temperature at intake too low
3. PCB defective
1. Check water filter and hydraulic circuit
(no cloggings)
2. Adjust temperature
3. Replace PCB
Antifreeze protection
Protection activated when ambient tempe-
rature is too low and unit is on standby.
No intervention necessary
High pressure protection
1. Insufficient water flow
2. Defective 4-way valve or excess
refrigerant
3. Water temperature setting too high
4. Pressure switch disconnected or
defective
5. PCB defective
1. Check water pump operation or adjust
regulating valve
2. Refill refrigerant
3. Lower water temperature
4. Reconnect or replace pressure switch
5. Replace PCB
Low pressure protection
1. Insufficient refrigerant
2. Defective 4-way valve
3. Pressure switch disconnected or
defective
4. PCB defective
1. Refill refrigerant
2. Replace valve
3. Connect or replace pressure switch
4. Replace PCB
Malfunction flow sensor
1. Water flow rate too low
2. Defective water flow sensor
3. PCB defective
1. Check your water circuit operation and
the opening of the bypass valves
2. Replace water flow contactor
3. Replace PCB
Excessive temperature diffe-
rence between water inlet
temperature
and water outlet temperature
for cooling mode
1. Water flow rate too low
2. PCB defective
1. Check your water circuit operation and
the opening of the bypass valves
2. Replace PCB
Vented air temperature too
high
Insufficient refrigerant gas
Same causes as fault E4
1. Refill refrigerant
2. Same measures as fault E4
Thermal protection
1. Water flow rate too low or water intake
temperature too high
2. Defective thermal protection
3. Bad connection
4. PCB defective
1. Check water flow rate or adjust water
temperature
2. Replace circuit breaker
3. Check connections
4. Replace PCB
Problems with connection bet-
ween PCB and controller
1. Bad connection
2. Wired controller defective
3. PCB defective
1. Check wiring connection between
controller and PCB
2. Replace controller
3. Replace PCB
GB
