Protection & Failure code
What did the error detect?
High water flow pressure switch
Check the water flow from the filtration pump, check the
sensor electrical connection, might need to change if
faulty, check the pressure switch and circuit
Low water flow pressure sensor
Check the water flow from the filtration pump, check the
sensor electrical connection, might need to change if
faulty, check the pressure switch and circuit
Check the water flow in pipes, and filtration pump
Check the Water flow switch
3 phases sequence protection
Electrical power connection
Check the power connection to the pump
Power supply excesses operation
range (Not failure)
1). Recover when back to the normal power
2). Replace PCB
Excessive temp difference between
inlet and outlet water (Insufficient
waterflow protection)
High temperature difference
Check the water flow in pipes, and filtration pump
Check the Water flow switch
Water outlet temp too high or too
low protection
Check if there is any blockage in the inlets, outlets, and
through the pipe
High exhaust temp protection
Check if refrigerant gas is leaking, check the connection of
the sensor, might need to change if faulty, check the
compressor of the pump
Ambient temperature too high or
too low protection (not failure)
Out of the heat pump’s capacity
to withdraw heat from the
atmosphere
Anti-freezing reminder (not failure)
Wait for automatic recovery
Compressor drive module failure
Check the voltage and the frequency conversion
Check the PFC switch circuit if short or not
Check the compressor wiring if its correct or if there is any
short circuit
Compressor running failure
Check the compressor wiring if its correct or if there is any
short circuit
Inverter board over current
protection
1). Wiring
2). Inverter board
3). PCB
Inverter board overheat protection
Check the current flowing it might need to
1). Power off and restart
2). Inverter board
3). Compressor
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