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REPAIRS
PROCEDURE
Repair a refrigerating unit must be carried out by specialised technicians. However, provided that the problem on the
cooler does not require access to the cooling circuit, repair can be undertaken by a mechanical/electrical maintenance
team. For any problem, we advise you to contact us for a list of approved after sales service companies.
TROUBLE-SHOOTING
FAULT OBSERVED
Temperature not at required level
Pump operating
Compressor not operating
Refrigerating unit operating inefficiently
Air drawn off from condenser is very hot,
compressor, fan and pump operating
Hight pressure cutoff
Pump and fan operating
Compressor operating intermittently
Outlet condenser air not hot
Absorbed current lower than normal value
Pump and fan operating
Compressor stopped
Outlet condenser air not hot
Low pressure cutoff
Pump and fan operating
Compressor operating intermittently
Pump unadapted or damaged
Fluide lack in cooling circuit
Anormal noise from pump
Little difference between inlet and outlet
temperature
Excessive water flow
Temperature not at required level.
Operation seems generally correct,
compressor intake tube under 18°C,
compressor discharge tube above 60°C
CAUSE
Regulation not actuated
Atmosphere too warm
Condenser battery dirty
Air flow abstructed
Fan rotation reversed
Not enough gas in frigorific circuit
atmospherer too cold
pressure reducer faulty
not enough coolant
Leakage in hydraulic circuit
Head losses too important
Pump operating in wrong direction
Water pressure too low at pump outlet
Air in the circuit
Insufficient cooling power to remove heating
from process
CHECK AND REMEDY
Check setpoint on regulator
Check operating limits
Clean condenser
Clear obstructions from vents
Reverse two phases (three-phase version)
Ask for refrigeration specialist intervention to
look for gas leakage
Check operating limits
Ask for refrigeration specialist intervention to
look for gas leakage
Stop the chiller
Check hydraulic circuit
Fill up hydraulic circuit
Reverse two phases (three-phase version)
Pump operating outside curve values
Purge hydraulic circuit
Check compatibility between chiller and
process
Check chiller cooling power determination
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