UMD V3 Installation Manual - Remote Control
13 November 2018
Page
31
of
39
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.
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.
APPENDIX E: Reversing the Wiring Between Serial and Data Ports
On the European Vector model reefers and occasionally on other models we need to swap the wiring between
the round data port and the flat serial port. This is required as Cooltrax utilizes Carrier’s 3
rd
Party protocol for