Controls Menu
The Controls menu displays a list of functions that identifies unit operating features and current settings. A complete listing of the controller Configuration menu is located on an 11” x 17” foldout in the Diagrams chapter (Diagram Index).
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Press the Enter key to view the Menu screen. Press the Down key to scroll down to the Controls menu.
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Press the Enter key to expand this menu.
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Press the UP or DOWN key to scroll to the desired function.
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Press the Esc key to exit the Controls screen.
The Controls will show the following submenus:
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Trip Start
OptiSet™ (Optional)
Allows all the TK Fresh variable to be set by selecting a specify commodity. Refer to (Change the TK Fresh Plus Settings Using OptiSet). TK Fresh must be selected under the CONFIGURATION/OPTIONS/CONTROLLED ATMOSPHERE (CA)/ TK FRESH MODULE for OptiSet to be active or visible.
Temperature Setpoint
Used to change the controller setpoint. The setpoint can also be changed from the Unit Status Display by pressing the Setpoint Enter key. The new setpoint is recorded in the controller datalogger and appears in the display.
Controlling Mode
To change the temperature and fan control of the unit. Select from OPTIMIZED or NON-OPTIMIZED.
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Optimized: The default mode for the new MAGNUM PLUS for temperature and fan control.
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Non-Optimized: The default mode for the original Magnum for temperature and fan control.
Note Enter setpoint temperature before selecting the Non-Optimized mode. The controller automatically turns the Non-Optimized mode off when setpoint is changed.
Bulb mode allows the system user to select one of three evaporator fan operations as well as the defrost termination temperature.
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Bulb mode HIGH: Evaporator fan high speed only.
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Bulb mode LOW: Evaporator fan low speed only.
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Bulb mode CYCLE: Evaporator fan cycle - fans will cycle between low and high speed every 60 minutes, starting with the low speed fan operation first for 60 minutes.
Pulldown Time
Water Cooled Condenser
This feature is turned ON when the unit is equipped with the optional water cooled condenser. If this feature is turned OFF, the condenser fan runs as required. If turned ON, the condenser fan does not run unless no cooling water is available, then the unit will trip off on HPCO and the condenser fan will run as required.
Dehumidify Control
During Chill mode operation, a dehumidification function is available to reduce the relative humidity in the container to the desired humidity setpoint.
HUMIDITY SENSOR mounted must be selected under the CONFIGURATION/OPTIONS/HUMIDITY SENSOR for DEHUMIDIFY CONTROL to be active or visible. Refer to (Dehumidify Mode) for a complete description.
Dehumidify Setpoint
The relative humidity setpoint can be set from 50 to 99 percent.
HUMIDITY SENSOR mounted must be selected under the CONFIGURATION/OPTIONS/HUMIDITY SENSOR for DEHUMIDIFY SETPOINT to be active or visible. Refer to (Dehumidify Mode) for a complete description.
AVL (Air Ventilation Logging)
The Fresh Air Exchange Recorder (AVL) detects vent disk movement and automatically displays a value in the LCD display for values of 0 to 125 m3/h. For settings greater than 125 m3/h the technician must set the AVL Open Value to match the notched setting on the Fresh Air Exchange Vent.
AVL must be selected under the CONFIGURATION/OPTIONS/CONTROLLED ATMOSPHERE (CA) and FRESH AIR OPTION must be mounted under CONFIGURATION/OPTIONS/FRESH AIR OPTION for AVL to be active or visible.
Fresh Air Vent Man - TK Fresh Mode
Can be set to OFF or TK Fresh.
OFF - Will override all settings and keep the TK Fresh door completely closed.
TK Fresh - Will allow and air exchange Rate and or Delay to be set.
Refer to (Starting the TK Fresh System) for more information about setting up TK Fresh.
Fresh Air Vent Man - TK Fresh Plus Mode
Can be set to OFF, TK Fresh, or TK Fresh Plus.
OFF - Will override all settings and keep the TK Fresh door completely closed.
TK Fresh - Will allow and air exchange Rate and or Delay to be set.
TK Fresh Plus - Will allow a CO2 Max to be set. Some container prefix allow O2 MIN to be set.
Refer to (TK Fresh Plus System) for more information about setting up TK Fresh Plus.
TK Fresh Delay
TK Fresh Rate
TK Fresh Plus CO2 Max
Used to set the highest level of Carbon Dioxide allowed in the container. The TK Fresh Plus door will open or close to maintain this level. Active only when TK Fresh Plus is enabled. Selectable from 0% to 25%. Refer to (Change the CO2 Minimum and Maximum Setting) for more information.
TK Fresh Plus O2 Min
Silent Mode
Silent mode is a way to make the reefer unit silent without manual switching it OFF and ON.
The feature is normally used when the reefer unit is located near public areas where the noise from the unit is annoying and not acceptable during ie. the night-time. The feature is selected either ON or OFF and the start time of day and stop time of day is configured all in the control menu, The time setting is controllable in increments of 5 minutes.
The mode is controlled by the wall clock of the controller and the start and stop time. The wall clock might not be set to the local time, so this must be taken in respect during the selection. In case of a period start prior to midnight the start time will be ‘higher’ than the stop time.
When the time is in between start and stop the unit operation will be halted, and the unit will not be operating the compressor, fans and heater. When the period ends normal operation will restart and the unit will operate through out the day until the beginning of the next period.
At the temperature log the flag ‘s’ will be set to indicate the halted operation.
Changing the configuration of the mode is documented in the event log.
Since the unit is not allowed to operate during the silent period, the normal surveillance is not ongoing. The surveillance is re-engaged when the unit restart the operation.