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30RA/30RH
GB - 14
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.
Symptoms Cause 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.