omi PRE 15, Use And Maintenance Manual, Page: 20 / 35

Cod. 710.0048.31.01 – Rev.1A – 02.2018
ENGLISH
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TROUBLE DISPLAY POSSIBLE CAUSE REMEDY
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Problems with the electrical components of
the compressor.
Check the electrical components of the compressor.
Defective compressor. Replace the compressor.
The flow rate and/or temperature of the gas
entering the refrigerator are higher than the
nominal values.
Restore the nominal conditions.
The ambient temperature is higher than the
nominal values.
Restore the nominal conditions.
The condenser is dirty. Clean the condenser.
The temperature control probe is positioned
improperly or faulty.
Check the probe; if the trouble persists, replace it.
Fan pressure switch defective or burned out
(if present).
Turn off the refrigerator and call your local distributor.
High pressure switch defective or burned out
(if present).
Turn off the refrigerator and call your local distributor.
Gas leakage in the refrigerating circuit. Turn off the refrigerator and call your local distributor.
Defective fan. Replace the fan.
Protection fuse burned out (if present). Replace the fuse.
The temperature control probe is positioned
improperly or faulty.
Check the probe; if the trouble persists, replace it.
Gas leakage in the refrigerating circuit
without load.
Turn off the refrigerator and call your locaI distributor.
The temperature control probe is positioned
improperly or faulty.
Check the probe; if the trouble persists, replace it.
Series of alarms very close to each other. Call your locaI distributor.
L
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W
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Ice formation in the evaporator.
Check the probe; if the trouble persists, replace it.
Check the electronic control board; if the trouble persists,
replace it.
Contact our distributor to check the gas charge.
Clog.
Check if the compressed gas inlet/outlet is connected
properly.
Check if the connecting tubing is clogged; in case proceed
accordingly.
Check if any valves are closed.
Check the condition of any filter.
4.3 DECOMMISSIONING
All work on the refrigerator may only be carried out by specialist personnel!
Follow this procedure if you need to shut down the refrigerator:
•
Stop the device and permanently isolate it from the electricity mains;
•
Disconnect the power cable;
•
Take pressure off the nitrogen circuit;
•
If the device has to be dispatched, use the original or similar packaging and keep the device in an up-right
position.
Before carrying out any work on the electrical parts, make sure that the main switch interrupts the electricity
supply to the refrigerator and then affix appropriate warning signs to avoid the machine being reconnected to
the electricity mains!
Please consult the contents and the safety instructions in the relevant sections of these instructions for details
of the correct handling and storage of the chiller. Remove any residual cooling medium from the refrigerator
in a manner appropriate to its properties and in accordance with the legislation in force.
If the device has to be demolished: Never open the sealed cooling assembly (compressor, evaporator and
condenser) if there may be any refrigerant or lubricating oil present!
Send the refrigerator to an approved waste disposal company in accordance with current environmental
protection legislation. The other materials/waste constituents must be treated in line with the provisions of the
valid legislation.