Da Inglese a Italiano Tecnico/Meccanico Meccanica/Ingegneria meccanica heat pumps

Fault codes list
Code
(status)
Description
Possible causes
Additional info.
The discharge pressure on compressor is too high.
Blocking fault after 3rd trigger attempt
There is an excess or a lack of refrigerant.
The outlet pressure is measured by the HP pressure sensor
After the first trigger, a time delay of 5 minutes is started.
The time delay is reset to zero after one hour.
After 3 triggers separated by less than an hour, the fault becomes blocking.
Vacuum insufficient
The compressor safety thermostat is tripped.
Presence of incondensables in the circuit
The pressure switch or its electrical connection is defective.
Pre-expansion in the liquid line (load loss)
Poor water flow rate.
The water flow sensor is defective.
Insufficient heat exchange at the plate to plate exchanger.
The pressure of the low pressure circuit is too low.
Lack of refrigerant.
The low pressure is converted from the evaporation temperature.
Lack of airflow.
There is no defrosting.
The ***condensate tray resistance heater*** is faulty.
The 4-way valve is defective.
The electronic expansion valve’s motor is defective or the connection is defective.
Cooling circuit pressure sensor fault.
The sensor is defective or not correctly connected to the main circuit board.

L'inglese di partenza non è molto buono. Non riesco a capire di cosa possa trattarsi.