Carrier Troubleshooting, 30RA/30RH, Gb, SymptomsCause REMEDY Unit does not start, Water loss

30RA/30RH

Troubleshooting

A list of possible faults, as well as the probable cause and suggested solutions is shown as follows. In the event of a unit malfunction it is recommended to disconnect the power supply and ascertain the cause.

SymptomsCause REMEDY

Unit does not start:

- No power supply;

CONNECT POWER SUPPLY.

- Main switch open;

CLOSE SWITCH.

- Low line voltage;

CHECK VOLTAGE AND REMEDY THE DEFICIENCY.

- A protection has tripped;

RESET.

- Contactor stuck open;

CHECK AND IF NECESSARY REPLACE CONTACTOR.

- Seized compressor;

CHECK AND IF NECESSARY REPLACE COMPRESSOR.

- Loose electrical connections;

CHECK CONNECTIONS.

Unit runs continuously or starts and stops frequently:

-Defective compressor contactor;

-CHECK AND IF NECESSARY REPLACE CONTACTOR.

-Defective compressor;

CHECK AND IF NECESSARY REPLACE COMPRESSOR.

- Refrigerant losses;

CHECK AND ADD THE NECESSARY QUANTITY.

- Total water flow too low

CHECK FOR PRESSURE DROP IN THE HYDRAULIC CIRCUIT.

-Static pressure in the hydraulic circuit too low;

CHECK IT ON THE PRESSURE GAUGE AND RESTORE IT IF NECESSARY.

Unit continuously cuts out at low pressure:

- Refrigerant losses;

CHECK AND ADD THE NECESSARY QUANTITY.

- Low water flow in the exchanger;

CHECK WATER PUMP.

- Unit start-up delay;

WAIT UNTIL THE SYSTEM HAS STABILISED.

Unit continuously cuts out at high pressure:

- Defective high pressurestat;

CHECK AND IF NECESSARY REPLACE PRESSURESTAT.

- Blocked expansion valve;

CHECK AND REPLACE IF NECESSARY.

- Blocked filter drier;

CHECK AND IF NECESSARY REPLACE FILTER.

- The outdoor fan/s does/do not work;

CHECK THE CONDITION OF THE FAN MOTOR/S AND ITS/THEIR ELECTRICAL CONNECTIONS.

-Obstructed or dirty battery;

REMOVE THE OBSTRUCTION OR CLEAN THE BATTERY.

Abnormal system noise:

- Piping vibration;

SUPPORT PIPING.

- Noisy compressor;

CHECK AND CHANGE IF NECESSARY.

- Hissing expansion valve;

CHECK AND ADD REFRIGERANT IF NECESSARY.

- Badly fitting panels;

INSTALL CORRECTLY.

Compressor loses oil:

- Leaking refrigeration circuit;

REPAIR LEAK.

Water loss:

- Defective entering or leaving connections;

CHECK AND TIGHTEN IF NECESSARY.

The unit does not defrost (only for 30RH units):

- Four-way reversing valve faulty;

CHECK AND REPLACE THE VALVE IF NECESSARY.

- Defrost sensor broken;

CHECK AND REPLACE THE SENSOR IF NECESSARY.

GB - 14