Thermo King SLXi Spectrum, Maintenance Manual

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Controller Operation 7-9
Initiating Manual Defrost
1. With the Standard Display on the controller, press and release the SELECT key until dEF appears in the upper display.
2. With dEF in the upper display, press the ENTER key to enter Defrost.
NOTE: The coil temperature must be below 7°C and the unit must be operating to initiate a defrost cycle.
• “LOd” (abbreviation for LOAD) will appear in the lower display for a few seconds.
• The defrost symbol will appear in the display when the unit starts the defrost cycle.
• Defrost will terminate automatically.
• If the ENTER key is not pressed, the operating mode will NOT change and the display will return to the standard display
in about 10 seconds.
Checking the Software Version
NOTE: The software version is important to know when servicing the unit.
1. With the unit operating, press and hold the TK LOGO key until “USC” appears in upper display.
2. Press the SELECT key to display “rEU” and the software version code.
Displaying and Clearing Alarm Codes
When the controller senses an alarm condition, an alarm symbol appears on the display. A two digit alarm code is used to identify
the type of alarm. There are three types of alarms:
• Stored Alarms: This alarm indicates that a condition should be investigated but does not currently affect unit operation. The
ALARM symbol appears for 30 seconds when the ON key is pressed and then disappear.
• Check Alarms: This alarm indicates that a condition requires corrective action before an abnormal condition becomes severe.
The ALARM symbol appears and remains ON.
• Shutdown Alarms: This alarm indicates that a condition may damage the unit. The controller stops the unit, the ALARM
symbol appears and the entire display flashes ON and OFF.
1. To display the alarm code, press and release the SELECT key until the alarm screen is displayed.
NOTE: If more than one alarm has been sensed, all alarm codes present will automatically alternate on the screen.
2. Write down each alarm code that appears. Then correct the cause of each alarm.
NOTE: Press the OFF key to stop unit before inspecting or servicing the unit. Turn the unit On/Off switch to OFF to service
the TG-VI microprocessor module or disconnect the unit battery. Finally, disconnect the battery to completely remove 12 Vdc
power to the unit for service of the microprocessor relay board and unit controls.
3. To clear the alarms after all problems have been corrected, start the unit. Then press and release the SELECT key until the
alarm screen is displayed again.
4. While the alarm screen is showing, press the ENTER key. The alarm will clear and the Standard Display will appear on the
screen. If more than one alarm code is present, repeatedly press the ENTER key to clear each alarm code individually.
NOTE: Alarms may continue to appear as the unit operates if the alarm condition is not corrected.
Viewing Information (Display) Screens
General unit operating information including mode settings, sensor temperatures and hourmeters can be easily viewed.
1. With the unit operating, press the SELECT key to display information screens. If no alarms exist, the first screen to appear
will be the dEF screen.
2. Repeatedly press the SELECT key to display additional information screens.
NOTE: Each screen will remain on the display for about 10 seconds. If no other key is pressed, the controller display returns
to the Standard Display.
Information screens appear on TG-VI controllers in the following order: