61 AF
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.
Loose electrical connections;
CHECK CONNECTIONS.
Unit runs continuously or starts and stops frequently:
Defective compressor contactor;
CHECK AND IF NECESSARY REPLACE CONTACTOR.
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:
Four-way reversing valve faulty;
CHECK AND REPLACE THE VALVE IF NECESSARY.
Defrost sensor broken;
CHECK AND REPLACE THE SENSOR IF NECESSARY.
