Pyromation T82 - Manual (Page 27)

T82 Diagnostics and troubleshooting
27
11 Diagnostics and troubleshooting
11.1 Troubleshooting
Always start troubleshooting with the checklists below if faults occur after start up or during
operation. This takes you directly (via various queries) to the cause of the problem and the
appropriate remedial measures.
Due to the its design, the device cannot be repaired. However, it is possible to send the
device in for examination. See the information in the "Return" section (® ä 32).
General errors
Problem Possible cause Remedy
Device not reacting. Supply voltage does not match that
specified on the nameplate. Apply the correct voltage.
No contact between connecting cables
and terminals. Check the contacting of the cables and
correct if necessary.
Output current < 3.6 mA Signal cable is wired incorrectly. Check wiring.
Electronics are defective. Replace the device.
HART communication not
working. Missing or incorrectly installed
communication resistor. Install the communication resistor (250 W)
correctly.
HART-Modem is connected incorrectly. Connect HART-Modem correctly.
HART-Modem is not set to "HART". Set HART-Modem selector switch to
"HART".
Checking the display
Problem Possible cause Remedy
No display visible
No supply voltage • Check the supply voltage at the head
transmitter → Terminals + and -.
• Ensure that the display module holders
are correctly seated and that the display
module is properly connected to the
head transmitter, (® ä 8).
• If possible test the display module with
another suitable head transmitter.
The display module is defective. Replace the module.
The electronics of the head transmitter
are defective. Replace the head transmitter.
Application errors without status messages for RTD sensor connection
Problem Possible cause Remedy
Measured value is incorrect/
inaccurate
Incorrect sensor orientation. Install the sensor correctly.
Heat conducted by sensor. Observe the face-to-face length of the
sensor.
Device programming is incorrect
(number of wires). Change the Connection type device
function.
Device programming is incorrect
(scaling). Change scaling.
Incorrect RTD configured. Change the Sensor type device function.
Sensor connection. Check that the sensor is connected
correctly.