page 8 SERVICE MANUAL FOR PRODUCERS SBR TYPE G-201-P00
PPUH „GECO” - G-201-P00 01,02 PRINTOUT DATE 05-01-24
5. The unit functions in the same way during manual and automatic defrosting.
C - Hysteresis
During programming of the parameter ‘d0’ and ‘d1’ (minimal and maximal temperature which can be
set by the client) one should remember that the value of hysteresis ‘d3’ causes additional lowering or
increasing of temperature beyond the temperature sent by the user.
This is particularly important for units with plus temperatures, which should always operate above 0ºC.
Example:
As a producer of cooling equipment, e.g. of a refrigerated display case (plus temperatures) I demand
that the unit allow operation within the range of values given below: off – min: 2ºC, on - max: 10ºC.
symmetrical hysteresis for even
values of‘d3’
asymmetrical hysteresis for odd
values ‘d3’
example 1.
Hysteresis of ‘d3’ is set as 2ºC
For the above setting of the hysteresis the
parameter ‘d0’ should be set as 3ºC and ‘d1’ as
9ºC
example 3.
Hysteresis of ‘d3’ is set as 3ºC
For the above setting of the hysteresis the
parameter ‘d0’ should be set as 3ºC and ‘d1’ as
8ºC
example 2.
Hysteresis of ‘d3’ is set as 4ºC
For the above setting of the hysteresis the
parameter ‘d0’ should be set as 4ºC and ‘d1’ as
8ºC
example 4.
Hysteresis of ‘d3’ is set as 5ºC
For the above setting of the hysteresis the
parameter ‘d0’ should be set as 4ºC and ‘d1’ as
7ºC
On
Temperature set
‘
’
Off
‘
‘d3’+0.5ºC
‘
’-
‘
’
‘d3’
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