Alarms - Zanotti GM1 Use And Maintenance Instructions

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ATTENTION
Do not use either hot water or any pointed, cutting, metal objects to remove ice blocks.
3.
4.
check microdoor connection keeping in mind that the switch contact must be closed when
the door is closed.
Unsatisfactory efficiency of the unit:
If no defects are found in the unit check that: cold room doors are perfectly tight; there is no
cold dispersion; the cold room is used wisely; no unfrozen liquids or foodstuffs are placed in
the low temperature room; the evaporator is ice-free.
We recommend installation of the machines far from the doors especially when the cold room
is expected to be opened many times a day.
WARNING:
Removal of protections during machine operation is absolutely forbidden. They have
been developed to safeguard the operator's safety.

12.4 Alarms

When an alarm condition occurs the following warning devices are activated (depending on
the nature of the alarm):
The buzzer and the alarm relay can be muted by pressing any key. When a key is pressed,
the led flashes as long as the alarm condition is
displayed, press ENTER key for 3 seconds: FnC appears. Press SB.M./UP key until AL is
displayed and then press ENTER. At this point a code is displayed indicating the cause of the
alarm.
To leave the alarm menu wait 15 seconds or press SET as long as cold room temperature is
displayed.
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Ice forms on the evaporator preventing air from flowing regularly.
Possible causes are:
- the door is opened too frequently;
- faulty operation of evaporator fan;
- faulty solenoid valve (in models with hot gas defrost);
- faulty defrost heater (in models with electric defrost);
- faulty defrost process. In this case some measures can be taken:
increase defrost termination temperature by some degrees, increase number of
defrosts.
Display does not light up. Check:
- if there is power to the unit;
- if mains cable is connected properly;
- fuses inside the electric panel
Unit does not start operating when pressing ON/OFF key (the display is turned on):
alarm led
buzzer
alarm relay.
present. To have the alarm code