omi PRE 15, Use And Maintenance Manual, Page: 19 / 35

Cod. 710.0048.31.01 – Rev.1A – 02.2018
ENGLISH
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The activation of the above function is at the User’s discretion. The User will purchase all necessary installation material.
Any operation which needs access to the refrigerator must be carried out by qualified personnel.
4. MAINTENANCE, TROUBLESHOOTING AND DISMANTLING
4.1 MAINTENANCE
Attention! Perform pressure test with inert gases only (helium, nitrogen).
Before attempting any maintenance operation, make sure that:
1. No parts of the system are under pressure.
2. No parts of the system are electrically powered.
WEEKLY OR EVERY 40 HOURS OF OPERATION
Verify the temperature on the control panel display is acceptable.
MONTHLY OR EVERY 200 HOURS OF OPERATION
Clean the condenser with compressed air, taking care not to damage the condenser fins..
At the end of the above mentioned operations, check if the refrigerator is working properly.
YEARLY OR EVERY 2000 HOURS OF OPERATION
Check if all connecting pipes are properly tightened and fixed.
At the end of the above mentioned operations, check if the refrigerator is working properly.
In case of replacement of one or more components of the device, disposed it along the eventual packaging of
the replacement part, as reported in the point 4.3.
4.2 TROUBLESHOOTING
Troubleshooting and eventual control and/or maintenance operations must be performed
by qualified personnel.
For maintaining the refrigerating circuit of the machine, contact a refrigeration engineer.
TROUBLE DISPLAY POSSIBLE CAUSE REMEDY
W
A
T
ER
I
N
T
H
E
SYST
EM
Control panel
display is
blank
No power in the line. Restore the power in the line.
Problems with cabling. Check cabling; if the trouble persists, replace it.
Problems with the electronic control board.
Check the electronic control board; if the trouble persists,
replace it.
The refrigerator is off. Turn it on by pressing the ON/OFF switch for 1 second.
Refrigerator in stand-by. Wait 2 minutes after the refrigerator is switched on.
Compressed gas inlet/outlet inverted.
Check if the compressed gas inlet/outlet is connected
properly.
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.
Problems with cabling or with the electronic
control board. Check the cabling and the electronic control board, if the
trouble persists, replace them.
Activation of compressor’s internal thermal
protection. Wait one hour and check again. If the fault persists: stop
refrigerator and call your local distributor.