Carrier AQUASNAP 30RH - Manual (Page 15)

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 .