Rivacold CO2NNEXT - Troubleshooting

CO
2
NNEXT
rev.01
EN
115 / 293
6. Troubleshooting
POSSIBLE CAUSE
SOLUTI
A
The compressor does not start and does not hum
x Absence of voltage. Starter relay with contacts
open.
x Check the line or replace the relay.
x The thermal protector intervenes.
x Check the electrical connections.
x Loose electrical connections or incorrect
electrical connections.
x Tighten the connections or re-perform the
connections according to the wiring diagram.
x Check inverter compressor
x Check the power and
communication cables
x Check for the presence
of alarms on the compressor
tl t i tl
B
Compressor does not start (emits hum)
x Incorrect electrical connections.
x Check the connections.
x Low voltage on the compressor.
x Identify the cause and eliminate it.
x Incorrect rotation of the
compressor.
x Check the phase sequence
x Check the compressor-inverter wiring
x Check the inverter.
x Check the power cables between the inverter
and compressor and communication cables
x Check for the presence
of alarms on the compressor
x Replace compressor
C
Inverter alarm intervention
x Low voltage to the compressor (unbalanced
phases on three-phase motors).
x Identify the cause and eliminate it.
x Check its characteristics and replace it if
necessary.
x Alarms presence.
x Check compressor rotation
x Check compressor working conditions
x Check the alarm type to identify and eliminate
the cause
x Replace compressor
D
Compressor starts and runs, with short-lasting operating cycles
x High pressure switch intervention.
x Check that the
fan-motor is
x Check the correct operation of the HPV valve.
x Low pressure protection intervention.
x Check and repair any refrigerant leaks. Then
reload the refrigerant.
x Verify correct operation of the expansion valves.
Replace the component if necessary.
x Check and correct user control parameters.
x Insufficient gas load. Add refrigerant
x Inverter alarm intervention.
x Verify the type of
alarms identifying and eliminating
the causes.
x Replace the compressors
E
Compressor emits loud noise
x Incorrect rotation.
x Incorrect rotation. Check the electrical
connection.
x Insufficient oil.
x Add oil to the intake of the individual
compressor, attempting to restart.
x Replace the compressor.