EN
30 - TROUBLESHOOTING
IMPORTANT: when carrying out repairs, always use original parts, paying particular attention to their installation, as all parts
must remain in their original positions.
Symptom
Cause
Solution
Condensation temperature too low
a) Insufficient gas
b) Obstacle in the expansion component
a) Look for leaks and top up the charge
b) Check the expansion valve
Condensation pressure too high
compared to the discharge air,
high pressure alarm
a) Insufficient air flow
b) Air intake temperature too high
c) Condenser fouled (no exchange)
d) Excessive refrigerant charge (condenser flooded)
e) The condenser fan is faulty
f) Air in the refrigerating circuit
a) Check the condenser fan
b) Check the condensation regulation setting
c) Clean it
d) Bleed
e) Repair
f) Bleed
The compressor does not start
a) Power supply fault
b) The contacts of a control components are open
c) Contactor coil blown
d) Internal electronic thermistor thermostat open
a) Check the differential and fuses
b) Check the safety chain
c) Replace it
d) Wait for the restart and check the input current
The compressor does not start,
the motor makes an intermittent noise
a) Network voltage very low
b) Power supply cable disconnected
a) Check the line voltage and locate the voltage drop
b) Check the connections
The compressor stops and starts
repeatedly
a) External control contact cycling too rapidly
a) Insufficient gas.
c) Evaporator fouled
d) The evaporator fan or accelerator pump is not
working.
e) Expansion device damaged or blocked by
impurities
f) Dehumidifier filter blocked.
a) Adjust the control (increase the control differential)
b) Look for the leak and recharge the equipment
c) Clean it
d) Repair or replace it
e) Replace it
f) Replace it
The compressor is noisy
a) Mounting loose
b) Insufficient oil
c) Noise inside the compressor
a) Retighten
b) Add oil to the recommended level
c) Replace it
Noisy operation
a) Unit installed without anti-vibration protection
a) Place the base on anti-vibration mountings
Evaporation pressure too low.
a) Insufficient flow rate in the evaporator
b) Evaporator frozen (for air evaporators)
c) Expansion valve blocked
a) Insufficient gas
e) Condensation temperature very low
f) Evaporator fan or accelerator pump faulty
a) Check the flow rates
b) Check the defrosting
c) Remove and clean the expansion valve
d) Look for the leak and top up the charge
e) Air temperature in the condenser very low (air flow
rate very high), adjust the flow rate using the CL2
control board
f) Repair it
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