FDEx2 INSTRUCTION MANUAL FDEx2 INSTRUCTION MANUAL
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Regulation Temperature Probe
Select the temperature probe used as the regulation temperature probe.
Probe 1 = Regulating probe connected to P1.
Probe 2 = Regulation probe connected to P2. Only available if 2 is selected from “Number of Temperature Probes”.
Temperature Blind Time
The duration that the regulation temperature probe reading will be ignored after the compressor switches ON.
Temperature Unit
Select the temperature unit used by the FDEx2.
°C = Degree Celsius
°F = Degree Fahrenheit
Note: Once a temperature range has been selected, all temperature values will be converted accordingly. If a display is
connected to the FDEx2, the temperature displayed will be shown in this unit.
Temperature Display Off-set Value
The difference between the live temperature reading from probe #1 and the displayed temperature.
Temperature Resolution
Select the increment/decrement the normal and set-back temperature parameters are settable to.
Normal Mode Temperature Cut-Out
The temperature at which the compressor will turn OFF when the system is running in Normal mode. The compressor will
remain ON until the temperature reaches the Cut-Out temperature.
Normal Mode Temperature Cut-In
The temperature at which the compressor will turn ON when the system is running in Normal mode. If the temperature is below
this value, the compressor will remain OFF.
Temperature Cut-Out in Setback mode
The temperature at which the compressor will turn OFF when the system is running in Set-back (energy saving) mode. The
compressor will remain ON until the temperature reaches the Cut-Out temperature.
Temperature Cut-In in Setback mode
The temperature at which the compressor will turn ON when the system is running in Set-back (energy saving) mode. If the
temperature is below this value, the compressor will remain OFF.
10.4 ENERGY SAVING (TEMPERATURE SET-BACK)
DESCRIPTION UNIT RANGE
Enable Temperature Set-back Yes or No
Door Open Duration to Exit Energy Saving (secs) Seconds N/A, 1 to 60
Energy Saving Max Duration (hours) Hours N/A, 1 to 24
Energy Saving Min Duration (mins) Minutes N/A, 1 to 240
Door Close Duration To Start Energy Saving (hours) Hours N/A, 2 to 8
Normal Mode Min Duration (hours) Hours N/A, 1 to 24
Enable Temperature Set-back
Select whether Temperature Setback is active. The setback is an energy-saving feature by setting higher cut-in/cut-out values,
therefore reducing the cooling demand required from the compressor.
No = Temperature setback is disabled. The FDEx2 will only operate in normal mode. All other set-back parameters will be de-
active.
Yes = Temperature set-back is enabled. Based ON set parameters, the FDEx2 will automatically switch between normal mode
and setback mode to save energy.
Door Open Duration to Exit Energy Saving
The minimum duration of a door open event, whilst in set-back mode before the FDEx2 will revert to normal mode.
Energy Saving Max Duration
The maximum duration that the FDEx2 will remain in set-back mode before reverting to normal mode cut-in and cut-out
temperature values.
Energy Saving Min Duration
The minimum duration that the FDEx2 will remain in set-back mode before reverting to normal mode. Regardless of a door-
open event, if the set time has not been satised, the FDEx2 will remain in energy-saving mode.
Door Close Duration to Start Energy Saving
The duration, without any door activity before the FDEx2 will enter set-back mode.
Normal Mode Min Duration
The minimum duration that the FDEx2 must be in normal mode before allowing energy-saving mode to initiate. After this time
has elapsed, and Door Close Duration to Start Energy Saving has been respected, the FDEx2 will enter energy-saving mode.
For example: Normal Mode Min Duration is set to 6 hours and Door Close Duration to Start Energy Saving is set to 2 hours.
After 3 hours of operation in normal mode, there is no door activity for 2 hours. The FDEx2 will resume in normal mode as the
Normal Mode Min Duration has not been met. After 6 hours and no more door openings, the cooler will immediately enter
energy-saving mode as both Normal Mode Min Duration and Door Close Duration to Start Energy Saving has been satised.
10.5 DELAYS AND TIMERS
DESCRIPTION UNIT RANGE
Compressor Relay Off Protection Delay (secs) Seconds 0 to 600
Protection Delay Initial Bypass Count Number N/A, 1 to 60
Delay Between Loads (secs) Seconds 0 to 60
Min Compressor On Time Before Cut-out Minutes OFF, 1 to 255
Min Compressor Off Time Before Cut-in Minutes OFF, 1 to 255
Compressor Relay OFF Protection Delay
The minimum time the compressor must be OFF, before turning ON. If the compressor is OFF for longer than the set duration,
then this delay will not be added before switching the compressor ON.
Note: Protection delay must be satised whenever the compressor is switched off regardless of the reason (high/low voltage,
temperature below cut-out, defrost, faulty probe, power down, etc).
Protection Delay Initial Bypass Count (for use in testing only)
The number of controller start-ups, in which the Compressor Relay OFF Protection Delay will be ignored. This will result in the
compressor turning ON as soon as the FDEx2 is powered up.
Note: The Compressor Relay OFF Protection Delay will still be respected during operation.
Delay Between Loads
The minimum time delay between one relay turning ON and another being allowed to turn ON.
Min Compressor On Time Before Cut-out
The minimum duration the compressor must be ON before being allowed to turn OFF even if the temperature drops below the
set cut-out value.
Min Compressor Off Time Before Cut-in
The minimum duration the compressor must be OFF before being allowed to turn ON even if the temperature rises above the
set cut-in value.
Note: Compressor OFF Time must be satised when the compressor switches off due to the temperature only. Compressor Off
Protection Delay and Compressor Off Time must be satised in this instance so the controller will remain off until the timer with
the longest set time has elapsed.
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