UMD V3 Installation Manual - Remote Control
13 November 2018
Page
28
of
39
If none of these actions resolve the issue the UMD will need to be removed and sent back to Cooltrax as:
1.
The SIM Card may be inactive or faulty
2.
The 3G or GSM Modem within the UMD may be faulty
3.
The software configuration of the unit may be corrupt
Fault: The Reefer Unit is on but we are not receiving Reefer Data
Diagnostics:
Cooltrax receives Reefer data via an interface connection between our UMD and the Reefer Serial Port.
When communications is in place between the UMD and the reefer the Interface LED on the UMD will be solid
red, if this LED is not lit then there is no interface available and corrective actions are required.
Actions:
Check the Interface cable is locked securely into place on the UMD COM2 panel connector
–
COM2 is the top
left connector.
Try a second Interface Cable if one is available, if not contact Cooltrax Support to arrange for a spare cable.
If the Reefer is fitted with a Carrier Standard Controller then it requires an EPROM upgrade to enable the 3
rd
party Communications DATATRAK option. See instructions in Appendix A for fitting the correct Revision
EPROM
–
it must be 3.32 and above. Without this upgrade the Interface will not work.
If the Reefer is fitted with a Carrier Advanced Controller then the Reefer must have its Data Port opened by a
Carrier supplied DATATRAK PCMCIA Card. See instructions in Appendix A for enabling the 3
rd
Party Protocol
Data Port on an Advanced Reefer unit. Without this upgrade the Interface will not work.
On the Advanced Controller only you may need to select “Other” as the protocol type in the Data Menu option
on the controller.
Testing the Fridge Interface:
After the UMD / Carrier Fridge interface cable is connected to the 3 way flat connector in the Carrier fridge loom, with
the fridge OFF, measure the resistance between the chassis (0V) and Pin 3 of the plug that will connect into the UMD
Comm2 Port. This should be <10 ohms. If this is not correct, check the wiring of the Flat Carrier loom plug back to the
Fridge Controller. Turn the fridge ON and measure the voltage between the chassis (0V) (negative of meter ) and Pin 2 of
the plug that will connect into the UMD Comm2 Port. This should be
–
8 to
–
10V DC. If this is not correct, check the
voltage on Pin 1 of the same plug. If that is
–
8 to
–
10V DC then the wiring to pins A & B of the carrier flat loom plug
need to be swapped and the measurement re-taken. If there is no voltage present on either pins 2 or 1, check the
connections from the Carrier loom flat plug back to the fridge controller.
