OEM Manual – CUBO
2
SMART
Pag. 23
10
Recommended Annual Checks
These checks should be carried out in conjunction with the customers’ requirements.
Compressor and Inverter Check
The compressor should inspected:
- unusual sounds
- unusual vibrations
- excessive temperature of the shell
Check tightness of all electrical terminals.
Check compressor bolting to the base
Control compressor running current is within
compressor data
Check the temperature of the body to detect
possible lack of lubrication. Top up oil if
necessary
Pressure vessels
All vessels should be inspected as per local
laws and customers’ requirements
Inspect insulation for damage and repair as
necessary
Investigate for any signs of corrosion
Investigate for any presence of leaks
Liquid drier
Liquid drier filter should be replaced every 2
years
Check temperature drop across the filter
Gas coolers
Whilst an annual check must be carried out, it
is recommended that gas coolers is
maintained cleaned to assure good
performance of the system
Keep the gas cooler coil clean from dirt, pollen
and leaves
A maintenance visit is recommended in spring
and autumn
Pressure switch and Pressure Relief Valve
High pressure switch must be checked to
ensure the safe operation of the unit.
Check the PRV valve is up to date
Test the correct cut out of the HP pressure
switch to ensure activation and reset at correct
pressure
Functionality of the electrical circuits must be
verified at this point
The PRVs must be tested for refrigerant
tightness and replaced as per manufacturers
guidelines or customers’ requirements
Unit operation
The operation of the unit should be checked to
detect faults in the controller, valves or
sensors.
Consult alarm logs
Check operation of HP & MP valves
Check calibration of temperature probes and
pressure transducers
Check alarm logs for present and past alarms
investigate and correct as necessary
