Search For Faults - Rivacold CO2NNEXT Instrucciones Para El Ensamblaje

6. Search for faults

EN
 Voltage absent. Start-up relay with open
contacts.
A
 Thermal protection trips.
 Loosened or incorrect electrical
connections.
Compressor does not start (releases humming sound) and the thermal protector trips
 Incorrect electrical connections.
 Low voltage on compressor.
 Defective condenser start-up.
B
 Relay does not close
 Electrical motor with interrupted winding
or short-circuited.
 Incorrect electrical connections.
 Low voltage on compressor.

Relay locked in closed position.
C
 Excessive discharge pressure
 Electrical motor with interrupted winding
or short-circuited.
 Low voltage to compressor (imbalanced
phases on three-phase motors).
 Defective thermal protection.
 Defective drive capacitor.
 Excessive discharge pressure
D
 Suction pressure too high.
 Compressor overheated, hot return flow
gas.
 Compressor motor winding short-
circuited

Thermal protector.
 Thermal switch.
 High pressure switch intervention, due to
E
insufficient cooling on condenser.
 High pressure intervention due to
excessive load of refrigerant gas.
 Low pressure switch intervention due to
poor refrigerant gas load.
66 / 168
POSSIBLE CAUSE
The compressor does not start and does not release a humming sound
The compressor starts but the relay does not open
Compressor starts and rotates with brief operating cycles
Co2Nnext
 Check the line or replace the relay.
 Check the electrical connections again.
 Tighten the connections or reconnect,
as shown in the wiring diagram.
 Reconnect.
 Identify the cause and eliminate it.
 Identify the cause and replace the
condenser.
 Identify the cause and replace the relay
if necessary.
 Replace the compressor.
 Check the electrical circuit.
 Identify the cause and eliminate it.

Identify the cause and eliminate it.
 Identify the cause and replace the
relay if necessary.
 Replace the compressor.
Thermal protector tripping
 Identify the cause and eliminate it.
 Check its specifications and replace it if
necessary.
 Identify the cause and eliminate it.
 Check ventilation and possible strictures
or obstructions in the system circuit.
 Check system sizing. Replace the
condensing unit with a more powerful
one if necessary.
 Check the refrigerant load, repair
possible leakage, and add gas if
necessary.
 Replace the compressor.
 See previous point (thermal protector
tripping).
 Small differential; correct adjustment.
 Check the correct operation of the fan
motor or clean the condenser.
 Lower refrigerant gas.
 Repair leakage and add refrigerant
gas.
REMEDY
rev.00