SCCB TYPE G-203-P00 Service Manual for Producers Page 9
PPUH „GECO” EDITION I PRINTOUT DATE 2014-04-15
happens when two alarms occur in the configuration: A1 and A3 and A1 and A2. At the moment of
failure from the evaporator sensor and the additional temperature sensor, A2 and A3 alarms
alternately with the chamber temperature are displayed alternately.
A1 – damage of chamber temperature sensor. GC20C will connect the compressor in a time cycle (so called:
clock control) according to time defined in parameters ‘c8’ and ‘c9’. Defrosting will function normally.
A2 – damage of evaporator sensor. The manual and automatic defrosting is blocked then!!! The only
possibility of defrosting the unit is to press the pushbutton in order to turn off the unit, and then
wait for the ice to thaw.
A3 – damage additional temperature sensor. When the parameter r6 = 3, alarm of the failure will be
signaled. If we change r6 = 0, Function of the third will be turned off and the controller will not report an alarm.
7. Fan control based on evaporator temperature
If the parameter 'd6' is set to a value lower than 40 ºC, the controller switches off the fan when the
temperature on the evaporator is higher than the value of parameter 'd6'. This function does not work
in defrost.
B – Defrosting
1. When additional defrosting is needed, due to difficult operating conditions, press the pushbutton. This
will make the green LED light constantly on the button and the „dF” symbol will appear on the display
instead of temperature measurement, and this is when the unit will enter the defrosting cycle.
2. If the time 'c0' has elapsed since the last defrost was turned on and the compressor is in operation then the
automatic activation of the defrost will be delayed until the compressor turns off due to reaching the set
temperature or exceeding the maximum working time specified by parameter 'c5'.
3. If the defrosting occurs, and the temperature on the evaporator is higher than set in the ‘d2’ parameter, the
unit (after about 10 seconds) will enter the defrosting exiting mode. After defrosting phase is over, device
start to work again.
4. If the defrosting occurs, and the temperature on the evaporator is lower than set in the ‘d2’ parameter, the
GC203 will activate the defrosting process, and after reaching the temperature as specified in the ‘d2’
parameter, the unit will enter the defrosting exiting mode (this status is signalled by the green LED, which
blinks on the button). In a version with heaters the defrosting exiting mode has two consecutive
Phases:
Thawing Phase – where the compressor and fans are turned off for the period as specified by the‘c3’
parameter.
Evaporator Freezing Phase – where only the compressor is operated, in order to lower the temperature
of the evaporator to the temperature as specified by the ‘d5’ parameter, prior to reactivating the fans.
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