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Temperature switch OTR31, OTR35
7
Diagnostics and troubleshooting
7.1
General troubleshooting
If an error occurs in the device, the color of the status LED changes from green to red and the
lighting of the digital display from white to red. A flashing red/green status LED signals a
warning. The display shows:
• An E-code in the event of errors
The measured value is uncertain if an error occurs.
• A W-code in the event of warnings
The measured value is reliable if warnings occur.
Code Description
E011 Device configuration is incorrect
E012 Measurement error or medium temperature outside the
measurable range
E019 Power supply out of specification
E015
E020
Memory error
E021
E022 Power is only supplied to the device via the communication
interface (measurement is disabled)
E025 Switching contact 1 is not open even though it should be
E026 Switching contact 2 is not open even though it should be
E040 VCC (controller voltage) is outside the operating range
E042 Output current can no longer be generated (only for
4 to 20 mA output, e.g. load too high at analog output or open
analog output)
E044 Output current drifts too much (± 0.5 mA)
Code
Description
W107 Simulation active
W202 Measured value is outside the sensor range
W209 Device starting up
W210 Configuration changed (warning code is displayed for
approx. 15 s)
W212 Sensor signal is outside the permitted range
W250 Number of max. switching cycles exceeded
Diagnostics and troubleshooting
Remedial action
Perform device reset → 15
Check the medium temperature; return the
device to the manufacturer if necessary
Check operating voltage and set to a valid
value
Return device to manufacturer
Check operating voltage
Switching contact is defective, return to
manufacturer
Switching contact is defective, return to
manufacturer
Return device to manufacturer
Check load; switch off analog output
Return device to manufacturer
Remedial action
Switch off output simulation for output 1 and 2
Operate device in the specified measuring range
Operate device in the specified measuring range
Replace device
25
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