Carrier AQUASNAP 30RA Manuel D'installation page 16

30RA/30RH
Troubleshooting
A list of possible faults, as well as the probable cause and sugge-
sted 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
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;
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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
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nections
-
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
GB - 14
Cause
remedy
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s and its their electrical con
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- 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
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