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Swimming Pool Heat Pump – S series
Common failures and maintenance
Failure
Possible reasons
Correction methods
P3
Inlet water temp sensor failure
1)
sensor open circuit
2)
sensor shot circuit
3)
Main PCB damaged
1)
Check the sensor connection
2)
Replace the sensor
3)
Replace the main PCB
P4
Outlet water temp sensor failure
Same as above
Same as above
P1
Coil temp sensor failure
Same as above
Same as above
P7
Ambient temp sensor failure
Same as above
Same as above
P2
Discharge air sensor failure
Same as above
Same as above
P8
Too low outlet water temp protection for
cooling mode
1)
Too low water flow rate
2)
Too low inlet water temp
3)
Main PCB damaged
1)
Check the water filter and
water circuit (no block)
2)
Adjust the setting temp to
normal working range
3)
Replace the main PCB
PC
First step anti-freeze protection in Winter
The protection occurred when ambient temp too
low and unit is standby
No correction needed
PC
Second step anti-freeze protection in Winter
E4
High pressure protection
1)
Too small cooling water flow rate or a high
temp
2)
The uncompressed gas in refrigerant system
3)
Overcharge refrigerant
4)
Too high setting water temp
5)
Bad connect of pressure switch
6)
The pressure switch failure
7)
Main PCB damaged
1)
Check if the water pump works
in good condition or adjust
water control valve
2)
Discharge and them recharge
the refrigerant
3)
Discharge some refrigerant
4)
Set lower water temp
5)
Reconnect the switch
6)
Replace the pressure switch
7)
Replace the PCB
P9
Low pressure protection
1)
Too less refrigerant
2)
Capillary block
3)
Bad connect of pressure switch
4)
The pressure switch failure
5)
Main PCB damaged
1)
Add some refrigerant
2)
Replace the capillary
3)
Reconnect the switch
4)
Replace the pressure switch
5)
Replace the PCB
Pd
Water flow switch failure
1)
Too low water flow
2)
Water flow switch damaged
3)
Main PCB damaged
1)
Check the water pump, if
needed replace one
2)
Check if the supplement is ok
3)
Replace the water flow switch
4)
Replace the PCB
P6
Too big inlet/outlet water temp difference for
cooling mode
1)
Too low water flow
2)
Main PCB damaged
1)
Check the water filter and
water circuit (no block)
2)
Replace the PCB
E3
Too high discharge air temp protection
1)
Too less refrigerant
2)
Similar possible reasons as E4
1)
Add some refrigerant
2)
Similar corrections as E4
E8
Communication failure between PCB and 1)
Communication failure
1) Check the connection wiring/ports
Operation and Installation Manual
27
2016/02
Summary of Contents for S Series
Page 37: ...Swimming Pool Heat Pump S series Operation and Installation Manual 3 2016 02...
Page 38: ...NOTES...
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