Gearbox current consumption should be between 1.9A (min) and 2.6A (peaks) with an average
2.2A. Safety trip will work at 2.4-2.6A and switch off the machine immediately.
If the machine is over 2 years old, also inspect the auger, bearings, and grease on bearings.
In case of excess current consumption, you can verify that the problem is in the gear-box by
either physically detaching gearbox and motor from auger and checking current consumption, or
by removing only the brown wire which provides current to the compressor.
In order to avoid damage to the gear-box, the safety trip is very sensitively adjusted and may
trip easily. You may teach the end user to re-connect the machine (by inserting a
pen/screwdriver through the front grille blades). This is best done after a one hour pause.
Should the machine trip on a regular basis (more than once a week), the end user must get in
touch with the service department.
10. SPECIAL ADVICE CONCERNING R-404 REFRIGERANT
R-404 is a mixture of 3 liquid-phase gases. On evaporating, the 3 component gases separate
Always use the liquid phase valve (at the end of condenser or accumulator) for refills and
purges.
When replacing a compressor, wash inside of circuit with a suitable solvent + pump, dry with
nitrogen gas, REPLACE THE DRIER WITH ONE SUITABLE FOR R-404, which must also
have ANTI-ACID properties.
If you need to add oil, use one which is specific for R-404 (POE). If you are in doubt, contact
the machine manufacturer.
If there is a leak anywhere in the circuit where R-404 in the GAS phase, and a refill of over
10% is required, then ALL THE GAS IN THE CIRCUIT MUST BE PURGED AND THEN
REFILL AS DESCRIBED PREVIOUSLY (LIQUID PHASE VALVE)
When charging via low-pressure valve, do not start compressor immediately, allow about one
hour for liquid to gasify.
To Next Page
