Alarms And Signals; Safety Pressostats; Routine And Periodic Maintenance; Basic Safety Standards - Keyfrost KBA Manuel

4.2 Alarms and signals

The control panel is equipped to display error messages (Alarms) using the DISPLAY
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 1)
" Ad2 " : Defrosting time dout
" Opd " : Door Open Alarm
" PA " : General pressure switch alarm
Press any button to silence the allarm. The LED will start to blink
Signals of defect probe
" 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".
To disable an alarm condition, press the FNC button .
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.

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
- Remove the plug (if fitted)
- Remove voltage using the 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.
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Manual
and the ALARM led .