Honeywell DR4500A - Table 9-16 Procedure #11-Troubleshooting the Auxiliary Output; Table 9-17 Procedure #12-Troubleshooting External Alarm Function Failure Symptoms; Table 9-18 Procedure #13-Troubleshooting Modbus Communications Failure Symptoms

Troubleshooting / Service
Troubleshooting Procedures
218 DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual Release L
February 2017
Table 9-16 Procedure #11—Troubleshooting the auxiliary output
Step
What to do
How to do it or where to find the data
1
Be sure the controller is configured for
Auxiliary Output.
Refer to Subsection 3.15 – Auxiliary Output Set
Up Group. Make sure AUX OUT is enabled and
the correct parameter is chosen. Check the High
and Low Scale values.
2
Check the field wiring.
Refer to Section 2 – Installation.
3
Check the output.
Use a milliammeter at connection J2 on the
Auxiliary Output printed circuit board to determine
the correct output based on your representation
of 4 mA and 20 mA.
4
Recalibrate the Auxiliary Output.
Refer to Subsection 8.4 – Auxiliary Output
Calibration.
5
Replace the Auxiliary Output printed
circuit board.
Refer to the instructions included with the
replacement part.
Table 9-17 Procedure #12—Troubleshooting external alarm function failure symptoms
Step
What to do
How to do it or where to find the data
1
Be sure all the alarm configuration data
is correct.
Refer to Section 3 - Configuration.
2
Check the applicable alarm relay jumper
position.
Refer to Section 3 - Configuration.
3
Check the field wiring.
Refer to Section 2 - Installation.
4
Check that the applicable alarm relay
actuates properly depending on ALARM
TYPE configuration selection.
Alarms can be triggered either by:
 reconfiguring the value of the trip points
(AnSnVAL), or
 connecting a signal generator to the input
and setting the generator level beyond the
trip-point values.
Table 9-18 Procedure #13—Troubleshooting Modbus communications failure symptoms
Step
What to do
How to do it or where to find the data
1
Check the field wiring and termination
resistor.
Refer to Figure 2-21 in Section 2 – Installation in
this manual.
2
Make sure the Modbus Communications
board is properly installed in the
recorder.
Open the recorder door and chart plate, and
inspect the board. Refer to Figure 10-4 for
location of the board.
3
Run a Loopback test.
Refer to Modbus Communications manuals
51-52-25-66 and 51-52-25-69 for loopback
information.