GE Xcellerex XDM Series Operating Instructions Manual page 270

9 Troubleshooting
Problem
Temperature control
unit (TCU) does not re-
ceive setpoint data:
the temperature is
•
not regulated
mixer vessel jacket
•
does not feel warm
TCU does not
•
sound as running
270
Possible causes
TCU is not powered.
There is no connection between the
I/O Cabinet and the PolyScience™
TCU.
There is no connection between the
I/O Cabinet and the Mokon™ TCU.
Xcellerex XDM 50-1000, XDUO 100-1000 mixers Operating Instructions 29251615 AD
Corrective action
Switch on the power.
Check if the connection between the
I/O Cabinet and TCU is functioning
properly. Do the following:
1 Hold the clock button on the left
side of the TCU until HL is dis-
played (a few seconds).
2 Press the clock button repeatedly
until CC appears on the left dis-
play.
3 If the display message is yes, the
connection is working properly.
4 If the display message is no, the
connection is not functioning.
Check the connection cable be-
tween the TCU and PLC.
Check if the connection between the
I/O Cabinet and TCU is functioning
properly. Do the following:
1 Verify that the controller located
on the front of the TCU is pow-
ered.
2 Disconnect the cable between
the TCU and the I/O Cabinet.
3 Verify that the connector pins are
not bent or damaged. Check both
ends of the cable.
4 Inspect the whole length of the
cable for damage.
5 Verify that the controller is set up
to accept a remote input. See
Mokon manufacturer's manual
for this procedure.