POOLEX Nano - Troubleshooting and Repairs; Breakdowns and Faults

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6. Maintenance and servicing
7. Repairs
In the event of a problem, the heat pump’s screen displays a fault symbol instead of temperature indica-
tions. Please consult the table below to nd the possible causes of a fault and the actions to be taken.
7.1 Breakdowns and faults
WARNING: Under normal conditions, a suitable heat pump can heat the water in a swimming
pool by 1°C to 2°C per day. It is therefore quite normal to not feel any temperature difference in
the system when the heat pump is working.
A heated pool must be covered to avoid any loss of heat.
Code Fault Possible causes Action
P1
Water intake temperature sensor malfunction
Sensor badly connected Reconnect sensor
Sensor defective Replace sensor
Defective control panel Replace control panel
P2
Water outlet temperature sensor malfunction
Same causes as P1 Same actions as P1
P3
Evaporator temperature sensor malfunction
P5
External temperature sensor malfunction
P7
Antifreeze protection
Protection activated when the ambient temperature
is too low.
No intervention is necessary
E1
High pressure protection
Insufcient water ow Check water pump operation
Pressure switch disconnected or defective Reconnect or replace pressure switch
Defective control panel Replace control panel
E6
Low pressure protection
Insufcient refrigerant Readjust the quantity of refrigerant
Pressure switch disconnected or defective Reconnect or replace pressure switch
Defective control panel Replace control panel
E3
Flow sensor malfunction
Insufcient water in heat exchanger Check your water circuit operation
Defective water ow sensor Replace water ow switch
Defective control panel Replace control panel
P8
Excessive difference between water inlet temperature and
water outlet temperature
Water ow rate too low Check water pump and hydraulic system operation
Defective control panel Replace control panel