Archives: FAQs

Internal communication error. The inverter control card has internal communication problems.

Overcurrent. Excessive current absorption by the compressor.

No charge. The compressor does not absorb enough current and may operate empty.

Incorrect voltage. The inverter control card indicates an incorrect BUS voltage.

Start-up error. The inverter control card indicates the incorrect start-up of the PMSM motor

IPM protection error. Error on the IGBT.

EEPROM error. Eeprom error on the inverter control card.

Compressor stalling.

No communication. The inverter control card does not respond; it may not be powered, or the serial cable may be disconnected, or the A and B signals may be inverted.

PFC module. Error in the PFC inverter module.

Excessive temperature of cooling blade.

Overcurrent in acceleration. Hardware error.

Overcurrent at constant speed. Hardware error.

Over-current in deceleration. Hardware error.

Undervoltage on BUS DC.

Overvoltage on BUS DC.

PFC Converter Fault Error in the PFC module. Software error.

Overcurrent in acceleration. Software error.

Overload.

Over-current at constant speed. Software error.

Over-current in deceleration. Software error.

Compressor not connected correctly.

No communication.

Error in cooling blade temperature sensor.

Irregular condition. Frequency reduced by over-current or over-temperature protection.

Faulty reverse cycle valve. The reverse cycle valve could be faulty or blocked.

Input water high temperature. The input water temperature has exceeded the value of installer menu parameter (H). There is probably a boiler in the same system. With the third pre-alarm intervention, the machine goes into lockout.