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Technical Information
27
Defrost termination mode (dt)
The defrost cycle can be terminated by using temperature or time values.
The lowest fin temperature (out of all fin sensors), air out temperature or evaporating temperature (suction
pressure sensor required) can be used to terminate a defrost. If a defrost termination by temperature is
configured, an alarm is triggered if the temperature value is not reached during termination time. If a defrost
termination only by time is configured in this case, no alarm will be triggered.
28
Day defrost termination temperature
Setting of defrost termination temperature for daytime operation. If a defrost termination by temperature is
configured, de defrost stops if temperature rises above this value.
29
Night defrost termination temperature
Setting of defrost termination temperature for nighttime operation. If a defrost termination by temperature is
configured, de defrost stops if temperature rises above this value.
30
Day defrost termination time
Setting of maximum defrost time for daytime operation. In any case the defrost is stopped and drain time is
starting (
32
) when this time has elapsed.
31
Night defrost termination time
Setting of maximum defrost time for nighttime operation. In any case the defrost is stopped and drain time is
starting (
32
) when this time has elapsed.
32
Defrost drain time
Delay after a defrost phase. During this period the water droplets can be drain off the evaporator. When an
electric defrost system is used, the heater is turned off. In case of a hot-gas defrost system, the compressor is
stopped and the four-way valve is switched.
The delay is used to prevent defrost water being transported from the evaporator to the cabinet via the air flow
of the fan after a defrost period.
Time setting in minutes.
33
Defrost synchronize mode
Configuration parameter whether synchronized defrost is permitted. (never, always, only during nighttime
operation or by Modbus). In case of a day to night transition the first defrost is started with a delay of 15 min.
In case of a termination by Modbus the digital input will be ignored.
34
Defrost on time 1 enabled
The defrost on time 1 can be enabled by using this parameter.
35
Defrost time 1
Defrost time 1 ([h x 60] + min) x 20 + (sec / 3)
Example for configuring a defrost at 6.30 AM: ([6 h x 60] + 30 min) x 20 + 0 (sec / 3) = 7800
36
Defrost on time 2 enabled
The defrost over time 2 can be enabled by using this parameter.
37
Defrost time 2
Defrost time 2 ([h x 60] + min) x 20 + (sec / 3)
38
Defrost on time 3 enabled
The defrost over time 1 mode can be enabled by using this parameter.
39
Defrost time 3 value
Defrost time 1 ([h x 60] + min) x 20 + (sec / 3)
40
Defrost on time 4 enabled
The defrost on time 4 can be enabled by using this parameter.
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Defrost time 4
Defrost time 4 ([h x 60] + min) x 20 + (sec / 3)
