Defrost Termination Temperature (Dtd); Compressor Rest Time (Rt) - Elstat ems75sz Manual

Range -30 to 5ºC (-22 to 41ºF)
-6ºC (21ºF)
Global default
ems75sz: -15ºC (5ºF)
9.15

Defrost termination temperature (dtd)

The table below details the defrost temperature duration (dtd) parameter.
Display
Defines the temperature to end the defrost cycle.
Ending defrost cycles on temperature minimizes the duration of defrost
cycles.
Description
The temperature is measured as follows:
Considerations
1 to 30ºC (33 to 86ºF)
Range
ems75sz: -5 to 22ºC (23 to 71ºF)
9.0ºC (48ºF) - OFC firmware
Global default 10.0°C (50°F) - Firmware excluding OFC and S Z
15.0ºC (59ºF) - S Z firmware
9.16

Compressor rest time (rt)

The table below details the compressor rest time (rt) parameter.
Display
Defines the minimum time between compressor cycles.
The compressor rest time ensures that the pressures in the refrigeration sys-
tem have time to equalize during compressor off-cycles.
Description
The compressor rest time (rt ) helps to avoid the following:
If set too low, the compressor rest time may cycle on the set point
Considerations (S P) and differential (dI F) temperatures or the saving set point
(S S P) and saving differential (S d) temperatures.
Range 1 to 30 minutes
Global default 3 minutes
OFC
and sub-zero coolers: the temperature is measured on the evaporator
l
sensor.
GDC
coolers: the temperature is measured on the appliance sensor.
l
Must be set above the set point (
l
I Pd
Must be set below .
l
If icing up occurs, review the values of the defrost parameters.
l
passing peak current through the windings of the compressor motor
l
switching off the system on the thermal overload protection
l
short cycling of the system.
l
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S P dI F
) plus differential ( ) temperature.