16
OPERATION CHECKS UPON THE UNIT
START UP
D Remove front service panel and, if neces-
sary, install the refrigerant service gauges on
the corresponding service valves to check
both the HI and LO refrigerant pressures.
NOTE. f, after ten minutes from the compressor
start-up, the evaporating temperature has not
dropped down to a value lower than -1°C (30°F)
the evaporating temperature sensor detects
such an abnormal situation and stops conse-
quently the unit operation (first the compressor
and 3' later the gear reducer). In this circustan-
ce, the 5th warning YELLOW LED will blink.
The machine will remain in OFF mode for one
hour then it will restart automatically. In case the
unit trips OFF again in alarm for 3 times in 3
hours, the machine SHUTS OFF DEFINITIVELY.
After having diagnosed and eliminated the
cause of the too hi evaporating temperature
(insufficient refrigerant in the system or com-
pressor not running) it is necessary to unplug
and plug in again to restart the machine. The
unit, before resuming the normal operation, will
go through the usual 3 minutes STAND-BY
period.
NOTE. On air cooled models, the condenser
temperature sensor, which is located within the
condenser fins, keeps the head (condensing)
pressure between preset values. In the event of
condenser clogged - such to prevent the pro-
per flow of the cooling air - or, in case the fan
motor is out of operation, the condenser tem-
perature rises and when it reaches 70° C
(160°F) for air cooled version - and 60° C
(140°F) - for water cooled version - the con-
denser temperature sensor shuts-off the ice
maker (first the compressor and 3' later the
gear reducer) with the consequent light-up of
the RED WARNING LIGHT (Fig.3).
The machine will remain in OFF mode for one
hour then it will restart automatically. In case
the unit trips OFF again in alarm for 3 times in 3
hours, the machine SHUTS OFF DEFINITIVELY.
After having diagnosed the reason of the tem-
perature rise and removed its cause, it is
necessary to proceed as per the previous
“NOTE” to start up again the operation of the
ice maker.
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