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17.2. Periodic table of service and maintenance
Tasks per components Actions
Months
1 3 4 12 24
Recommended inspection
and maintenance interval
1 - Casing
1.1
Control possible contaminations, damage
and/or corrosion
Clean and repair if required
✘
1.2
Check the possible presence of water
(condensates, leakages,...)
Clean and look for the cause, then
repair
✘
1.3 Verify thermal insulation aspect Replace if required
✘
1.4 Check the state of the anti-vibration pads Replace if required
✘
1.5 Check the condition of door gasket Replace if required At each inspection
2 - Refrigerant circuit
2.1
Verify oil compressor level when compressors
are off
✘
2.2 Check for lack of gas bubbles in the fl uid line
✘
2.3
Check for lack of humidity in the refrigerating
fl uid
✘
2.4
Check that pipes or capillaries do not rub and
vibrate
✘
2.5
Check that compressors do not emit
abnormal noise or vibration
✘
2.6 Check the backfl ow temperature
✘
2.7 Record the operating pressure
Check it is above or below those
recorded when the unit was started up
✘
2.8
Check tightness of compressor fastening
screws
✘
2.9
Check the crankcase heaters are powered on
during the stop cycle
✘
2.10 Check cleanliness of the coil Clean if required
✘
2.11 Test the oil for contamination Change the oil if required
✘
2.12 Check for fi lter drier clogging Replace if required
✘
2.13
Check the operation of the high pressure
switch
Replace if required
✘
2.14
Check for lack of refrigerating fl uid leak
(visual + leak detector if necessary)
Repair
✘
2.15 Check reversing valve operation
✘
2.16
Check the condition of the anti-vibration
mounts
Replace if required
✘
3 - Hydraulic circuit
3.1
Check the state of the hydraulic installation,
check there is no damage nor corrosion
Clean and repair
✘
3.2
Check the condition of the exchanger, in
terms of corrosion and functionality
Clean and repair
✘
3.3
Check fastening and tightness of the pipe
connections
Readjust and repair if necessary
✘
3.4
Verify the pressure value of the hydraulic
circuit
✘
3.5 Bleed the air
✘
3.6 Run the isolation valves
3.7 Check there is no ice build-up
✘
3.8
Check the state of the pipework thermal
insulation
Repair and replace if required
3.9
Check the frost protection devices (glycol-
based water, thermostat, …)
Repair and replace if required.
When air temperatures are wintery,
and after general stoppage of the
installation, the water contained in the
plate exchanger may freeze.
To prevent such problems, fully drain
the unused plate exchanger or protect
it by pouring an antifreeze solution into
the hydraulic circuit or other devices.
The manufacturer waives any
liability for damage to the plate
exchanger caused by water freezing
inside the unit.
Whenever there is a risk of
freezing
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