Swimming Pool Heat Pump Error Codes
Troubleshooting Leomon Pool Heat Pump Error Codes
Alarm Code E0 Error Description Probe 1 Error (Control)
Alarm code E1 Error description Probe 2 error (defrost)
Alarm Code E2 Error Description Probe 3 Error (Condition)
Alarm code IA Error description External alarm
Alarm code dOR Error description Door open alarm
Alarm code LO Error description Low temperature alarm
Alarm code HI error description High temperature alarm
Alarm code EE Error description Unit parameter error
Alarm code EF Error description Operation parameter error
Alarm Code Ed Error Description Defrost Timeout Ended
Alarm code dF Error description Defrost operation
Alarm code cht Error description Condenser dirty pre-alarm
Alarm code CHt Error description Condenser dirty alarm
Alarm Code EtC Error Description Clock Alarm
Off – Desired programmed temperature point is below 60°F (15°C).
LP & LP3 - Insufficient refrigerant gas in unit or low pressure
control failure. After 3 LP failures, the device will display (LP3) and shut
down the device and pool pump for protection. If this happens, you should call
for service.
HP & HP6 - Low water flow or high pressure control failure in the
unit. Check water flow/backwash. After 6 HP failures, the device will display
(HP6). This will stop the device from protecting.
FLo & FL3 - Possible Causes:
1. The filter is in the backflush position.
2. The filter pump stops.
3. The filter is dirty.
4. The pool pump is short of water.
5. The water pressure switch must be adjusted, otherwise it is broken.
6. The device is in protected mode and will display (FL3), press any key
to restart the device.
7. The FL3 code will stop the device and pool pump.
FS – The device is in a defrost cycle. (The fan works, but the
compressor stops.)
warn! Any troubleshooting involving electrical or refrigeration should
only be performed by licensed personnel. Any electrical work should be
performed with the equipment electrically isolated.
Machine won't start
As a safety feature, the heat pump has a programmed time delay, usually a few minutes, between supplying power and starting the unit. Wait for this time delay before making the following checks:
1. Check that the device is powered on.
2. Check that the phases are rotated correctly (three-phase units only)
The red and green lights on the Phasefail sequence relay are on. If the red
light is on, it only means that the phase is missing or incorrect
3. Check the water flow
4. Check for loose electrical connections and wiring.
5. Check the power fuse.
6. Check that the thermostat is set correctly.
Swimming pool does not heat
1. Check that the temperature of the outgoing air is lower than that of
the incoming air. Check the evaporator and internal pipes for sweat. This is
evidence of heat dissipation from the air, indicating that the heater is
working.
2. Check that inlet louvers, outlet grilles and condenser coils have
satisfactory airflow and are not blocked.
3. Check that the thermostat is set correctly
4. Check if the pump is running
5. Check that the water filter is functioning properly
6. Check that the intake valve is not closed
7. Check that the ambient air temperature meets the design criteria
