RG66001652_REV.02
36
LCW - LCR
TROUBLESHOOTING
On the next pages you will find a list of the most common causes that may cause the chilling unit to fail or
malfunction. These causes are broken down according to easily identifiable symptoms.
You should be extremely careful when attempting to implement any of the possible
remedies suggested: overconfidence can result in injuries, even serious ones, to
inexpert individuals. Therefore, once the cause has been identified, you are advised to
contact the manufacturer or a qualified technician for help.
FAULT
Possible causes
Corrective actions
The unit does not start
No power supply
Check that power is being supplied
both to the primary and auxiliary
circuits.
The electronic card is cut off from
the power supply
Check the fuses
Alarms have been triggered
Check whether any alarms are
signalled on the microprocessor
control panel, eliminate the causes
and restart the unit.
The phase sequence is wrong
Invert two phases in the primary
power line after disconnecting
them upstream from the unit
The compressor is noisy
The compressor is rotating in the
wrong direction
Check the phase sequence relay.
Invert the phases on the terminal
board after disconnecting the unit
and contact the manufacturer.
Presence of abnormally high
pressure
Insufficient flow of water to the
condenser
Check for any clogging in the
water circuit.
Check
the
compressor
inlet
water
T
Check
the
condensation
control
device [optional]
Presence of air in the refrigerant
circuit, as revealed by the
presence of bubbles in the flow
indicator also with undercooling
values exceeding 5 °C
Drain and pressurise the circuit
and check for leaks. Evacuate
slowly [for more than 3 hours until
reaching a pressure of 0.1 mBar
and then recharge in the liquid
phase
