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Technical Information
81
Fan restart temperature threshold after defrost
After an electrical or hot-gas defrost the fans are started again if the temperature of the sensor selected in
27
drops below the level configured in this parameter.
82
Sync. Delay after defrost
Maximum idle time the device is waiting for other cabinets to finish defrost. In any case after that time cooling
is started again. This is done to prevent one device blocking the whole group in case of an error.
Figure 20: Synchronized Defrost
83
Password for display
The display password is set by this parameter.
84
Variable speed startup duration
When switching on the variable speed out of Off state the compressor first run on a constant speed defined by
Parameter
85 Variable speed startup speed
. This parameter defines the duration of this startup phase.
85
Variable speed startup speed
When switching on the variable speed out of Off state the compressor first run on the speed defined by this
parameter.
86
Pack remove capacity delay
If a pack controller is used, stopping the next compressor (reduce power) could be delayed by this parameter.
87
Pack add capacity delay
If a pack controller is used, starting the next compressor (increase power) could be delayed by this parameter.
88
Pack compressor selection
Two modes could be selected for pack control:
•
rotating: the next compressor which will be added is the one with lowest run time
•
base load: compressor 1 is used as a base load. Compressor 2 and 3 are chosen by run time.
89
Pack defrost compressor delay
Figure 21: Pack Defrost Compressor Delay at Hot Gas Defrost
If a hot-gas 4-way defrost is configured the adding of additional compressors in defrost mode could be delayed
by this parameter.
Max. idle time for
other cabinets to
finish defined in
cfg 82
End of defrost cycle
Waiting for other
equipment
"Synchronized defrost"
Set interval timer to defrost interval
Duration of defrost phase variable
Max. time defined by parameter: Defrost time limit
(daytime or nighttime operation)
Duration of drain
phase defined by
parameter: Draining
delay
Normal operation
Start of defrost cylce
End of defrost cylce
Comp 1
Comp 2
Comp 3
ON
ON
ON
OFF
OFF
OFF
Cfg_89
Cfg_89
