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Switching on the cold room light
4.1.5
Press the cold room light button to switch on or switch off the cold room light.
When the light is switched on, the pilot light alongside the button will light up.
Stopping the machine
4.1.6
To switch off the machine it is necessary to push POWER for more than 5 seconds and the DISPLAY swiches off.
If the machine is to remain switched off for long periods, it is advisable to disconnect it from the power supply mains.
Keyboard lock
4.1.7
The keyboard has a key lock functionality to prevent unintentional set point changes by the operator. To lock the keyboard, press
and hold the UP and ESC keys simultaneously. To unlock, press the same keys again.
4.2 Alarms and signals
The control panel is equipped to display error messages (Alarms) using the display and the ALARM led .
The following is a list of possible messages:
SIGNALS OF ALARM
" AH1 " : High temperature alarm (referring to room probe or probe 1)
" AL1 " : Lew temperature alarm (referring to room probe or probe 1)
" AH3 " : High temperature alarm (referring to probe 3)
" AL3 " : Lew temperature alarm (referring to probe 3)
" Ad2 " : Defrosting time out
" EA "
: External alarm
" Opd " : Door Open Alarm
" E7 "
: Master-Slave Communication failure
" E10 " : Clock battery alarm
" PA "
: General pressure switch alarm
" LPA " : Minium pressure swich alarm
" HPA " : Maximun pressure swich alarm
Press any button to silence the allarm. The LED will start to blink
SIGNALS OF PROBE DEFECT
" E1 " : Faulty probe 1 (thermostat control)
" E2 " : Faulty probe 2 (evaporator)
" E3 " : Faulty probe 3 (condenser)
If simultaneous, they will be shown on the display alternately every 2 seconds.
4.3 Safety pressostats
In some machines it is foreseen the presence of safety pressostats. These pressostats are installed to reveal low pressure and high
pressure in the refrigerant circuit. This can be done manually or automatically.
The first ones open or close automatically based on the state of work of the machine. The second ones have to be manually reset by a
qualified technician. Some of the releasing causes of the pressostats are:
• the presence of tube-blocking elements.
• the presence of influencing air inside the refrigeration-gas system.
A temperature alarm has been fitted. This is signalled by the ALARM led, which lights up when the temperature in the cold room
undergoes a large variation beyond the limits set above or below the "set point".
CAUTION ! To disable an alarm condition, press the ESC button .
CAUTION ! The "PA" error causes the machine stop. (This error happens when the limits set by means of the parameters "PEn" and
"PEi" are exceeded) To restart the machine, it is necessary to switch off and switch on the power supply. If the error persists, contact the
Technical Support Service.
Routine and periodic maintenance
5.
The instructions contained in this section relative to routine maintenance are for unqualified but trained personnel.
As far as regards periodic/scheduled maintenance, instructions are for qualified personnel only.
5.1 Basic safety standards
This paragraph informs the machine user of the basic standards to follow before proceeding, in conditions of total safety, to carry out
routine maintenance operations. Anyway all the other prescriptions given by this manual (Chapter 1) are valid and must be followed.
Principal guidelines
5.1.1
Before carrying out any maintenance operations, disconnect the machine from the power supply mains :
- Press the O/I button so that the DISPLAY switches off
- Put the disconnecting Device in OFF position / Remove the plug (if fitted)
- Remove voltage using the relevant thermomagnetic switch
Use gloves to carry out maintenance in proximity to "High and Low Temperatures"
Warnings
5.1.2
Do not approach electrical parts with wet hands or bare feet.
Do not insert tools or other objects into the protection grids.
Do not remove safety devices (grids, decals, etc.) during maintenance operations.
Emergency operations in the event of fire
5.1.3
In the event of fire do not use water. Use an extinguisher to cool the affected area as quickly as possible.
Manual
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