Service manual

Page 13
Page 13
When the gear motor rotating speed is slowed
below 1300 r.p.m. from the normal speed of
1400 r.p.m. the Electromagnetic Safety Device
transmits an electrical signal to the
MICROPROCESSOR to stop immediately the
unit operations like it occures for the wrong
rotation, with the lighting-up of the 3RD YELLOW
WARNING LED. This to relieve from the
excessive load all the electrical and mechanical
components of the entire Drive System and
extend their durability.
NOTE. After having diagnosed and eliminated
the source of the gear motor slow rotation to
restart the unit it is necessary to press the
RE-SET push button or switch OFF and ON
the power line main switch.
NOTE. Any time the machine stops in alarm
the front four LED's start to blink.
REFRIGERANT METERING DEVICE:
capillary tube
OPERATING PRESSURES
(With 21°C ambient temperature)
D ischarge pressure: 9 ÷ 10 bar (125 ÷ 140 psig)
Suction pressure: 1 bar (14 psig)
REFRIGERANT CHARGE (R 134 A): 370 gr
NOTE. Before charging the refrigerant system
always check the type of refrigerant and
quantity as specified on the individual ice
machine dataplate.
The refrigerant charges indicated are relatives
to averages operating conditions.