iTHERM TrustSens TM371, TM372
Diagnostics and troubleshooting
Hauser
35
9
Diagnostics and troubleshooting
9.1
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 its design, the device cannot be repaired. However, it is possible to send the
device back for examination. See the information in the "Return" section. → 41
General errors
Problem
Possible cause
Remedy
Device is not responding.
Supply voltage range does not match
that specified on the nameplate.
Apply correct voltage, see nameplate.
M12 plug is not connected correctly,
wrong cable wiring.
Check the wiring.
Output current < 3.6 mA
Device is defective.
Replace the device.
HART communication is not
working.
Missing or incorrectly installed
communication resistor.
Install the communication resistor (250
Ω) correctly.
2
3
4
C
o
m
m
u
b
o
x
PMC731: PIC0001
Online
1 >Group Select
2 PV 0.7 bar
HELP
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HOME
1
A0032326
1
TrustSens compact thermometer
2
HART® communication resistor, R =
≥ 250 Ω
3
PLC/DCS
4
Configuration examples: FieldCare
with Commubox, HART® handheld
communicator as well as via Field
Xpert SFX350/370
Commubox is not properly
connected.
Connect Commubox correctly .
9.2
Diagnostic information via LEDs
Position
LEDs
Function description
1
A0031589
1
LED for device status
indication
LED green (gn)
is illuminated
Voltage supply is correct. The device is
operational and the set limit values are met.
LED green (gn) is flashing
With a frequency 1 Hz: self-calibration
currently being performed.
With a frequency 5 Hz for 5 s: self-calibration
finished and valid, all process criteria were
within specifications. Calibration data stored.
LED red (rd) and green
(gn) are flashing
alternating
Self-calibration process finished but not valid,
violation of necessary process criteria.
Calibration data not stored.
LED red (rd) is flashing
Presence of a diagnostic event: "Warning"
LED red (rd) is illuminated Presence of a diagnostic event: "Alarm"
Summary of Contents for iTHERM TrustSens TM371
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