Stulz Split-Air CST 50 - 22. Faults, Probable Causes, Possible Remedies; 22.1 FAILS TO COOL; 22.2 FAILS TO COOL SUFFICIENTLY

E/0204/39/76
22 Faults, Probable Causes, Possible Remedies
22.1 FAILS TO COOL
.1 No part is working;
.1 Lack of voltage to the unit;
.1 Check that doors closed and switches are turned on.
.2 Compressor, condenser fan and evaporator fan not working;
.1 Cooling system has run out of refrigerant;
.1 Contact STULZ technician or service department;
.2 Compressor mechanically defective;
.1 Contact STULZ technician or service department.
.3 Compressor and condenser fan working, evaporator fan not working;
.1 fan capacitor is defective;
.1 Replace fan capacitor;
.2 Evaporator fan defective;
.1 Replace fan.
.4 Condenser and evaporator fan working, compressor not working;
.1 Where present, compressor circuit breaker defective;
.1 Replace circuit breaker and check efficiency of the compressor's
electrical parts;
.2 Compressor start relay defective;
.1 Replace compressor start relay;
.3 Where present, start-up condenser defective;
.1 Replace start-up condenser;
.4 Compressor motor defective;
.1 Contact STULZ refrigerant system technician or service department.
.5 High pressure switch defective;
.1 Contact STULZ refrigerant system technician or service department;
.6 Where present, compressor remote control switch defective
.1 Replace remote control switch.
.5 Evaporator and condenser fan and compressor working;
.1 Adjustment thermostat defective or calibrated at a temperature exceeding
the temperature in the cabinet;
.2 When present, anti-freeze thermostat defective.
22.2 FAILS TO COOL SUFFICIENTLY
.1 Evaporator fan working, compressor and condenser fan working
intermittently
.1 Service anti-freeze thermostat;
.1 Clean evaporator
.2 Check for any external causes which may limit the airflow to the
inside circuit;
.2 Where present, service low pressure switch;