page 6 SERVICE MANUAL FOR PRODUCERS SBR TYPE G-201-P00
PPUH „GECO” - G-201-P00 01,02 PRINTOUT DATE 05-01-24
VI. OPERATION METHOD
A - General information
1. Start after connection to mains
When the unit is connected to mains a 3-second start procedure takes place during which two dots
appear on the display for a second, controller program version appears for another second and then
two dots appear again. At that time none of controlled units is switched on.
If the unit was on when power was disconnected, at the end of start procedure it will be on and the
value of temperature in chamber sensor appears on the display.
If it was off, two horizontal lines will appear on the display.
2. Functions of buttons
- When pressed, thermostat is switched on/ off. When it is off, two horizontal lines appear on
the display.
- When pressed, light is switched on/ off. This is signalled by a green diode at the button.
Button works independently from thermostat switch - .
- Used for manual defrosting.
- used to program settings and to end programming.
- used to increase temperature set during programming and to switch on monitoring of
evaporator temperature.
- used to decrease temperature set during programming and to switch on monitoring of chamber
temperature during defrosting.
If G-201 was provided with sound signalling, pressing of any button is signalled by a short sound.
3. Programming of temperature:
When is pressed, programming mode begins, the value of a parameter appears on the display and
a diode at the button
switches on.
When
are pressed, the value of a parameter changes within the range ‘d0’ – ‘d1’.
When
is pressed, settings are memorised and normal operation of the controller follows.
If G201 is switched off during programming, it will not memorise the new value of temperature.
4. Signalling of compressor operation
When the compressor is on, small red diode (dot) in the right bottom corner of temperature display is
on. This facilitates checking of possible defects of the system.
If the compressor should be switched on and it is not because one of protections has been switched
on (see item 5), the dot which signals operation of the compressor will flash. When the set time of
protection ends, the dot will be lit permanently and the compressor will be switched on.
5. Compressor protection
• A delay in switching on of the compressor when the temperature at which it should be on is
reached (temperature set by the user minus the lower value of hysteresis) is 30 seconds. If during
that time temperature falls, condition of excess of 30 seconds is checked again. This is to protect
the compressor against unneeded switching on caused by e.g. placement of goods, drafts, etc.
• From the moment when the compressor is switched off for time defined by parameter ‘c2’, G-201
will prevent compressor from switching on.
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