UMD V3 Installation Manual - Remote Control
13 November 2018
Page
30
of
39
Check Battery Voltage on the Reefer Battery if it is below 12.3DCV you will need to either turn on the reefer or
charge the battery as the UMD will not power on at this charge level. The UMD will switch to sleep mode at
12.3V which indicated by the Green Power LED being the only one illuminated.
Once the battery is charged up to 12.8V then the UMD will switch back into full active mode.
Check that the red wire on the UMD Power Cable is connected to the +Ve on the battery and the black to the
–
Ve terminal.
Check the fuse in the inline fuse holder located on the +Ve cable
Make sure the end two-pin cable connector is tightened securely to the panel connector on the UMD labeled
Power
–
the top left connector on the UMD.
Try a second power cable if it is available, if not contact Cooltrax Support to arrange for a spare cable.
Fault: RF Door Tag is not Reporting
The RF Door Tags are typically mounted on the side and/or rear doors of the trailer and communicate back to
the UMD in the Reefer unit via the Low Profile RF Antenna located on the internal roof of the trailer.
Actions:
Check that the gold SMA RF Connector is connected to and tightened firmly on the RF panel connector on the
front of the UMD
Make sure that the Tag is turned On
–
hold down the On/Off Button if the Tag is currently on then the On LED
will flash Green rapidly if it is off then the Red Off LED will flash. To change from Off to ON continue to hold
down the On/Off Button and the Tag state will change after a few seconds.
The distance between the Tag and the Magnet can be no more than 12mm
–
check that the distance where it
is installed is OK. To test you could remove the magnet and hold it against the tag then move it away from the
Tag, the Red LED should flash after about 20 seconds, and then, when you bring the magnet back up to the tag
it will flash green after 20 seconds.
Make sure that the side of the tag with the label Magnet attached is facing the magnet when installed.
Make sure the Antenna is mounted with the flat blue antenna case oriented across the trailer width not
length-wise as this reduces RF capability.
Make sure that neither the Tag nor the antenna is flat against or located behind any metal obstructions.
Try another Tag or Antenna if you have one, if not contact Cooltrax Support to arrange for a spare.
Fault: RF Temperature Tag is not Reporting
