KROHNE TTP 400 EN - Manual (Page 7)

Installation and Operating Instructions TTP x00 7
3 Fault diagnosis and corrective action
In the event of a fault or maloperation, please go through the various faults listed in the table. Do
not attempt to disassemble the device.
Should you fail to locate the fault, please contact our Technical Service.
Fault Cause Action/elimination
With Pt100 connection
Incorrect display
Terminal assignment is
incorrect Check terminal assignment
Cable break Measure continuity Error display
Short-circuit Check wiring
With integrated signal converter
Supply voltage at module
< 8 V Load impedance too high,
voltage too low Incorrect current signal
Incorrect measuring range Correct the programming
Cable break Check continuity of cables No current signal
Supply polarity incorrect Reverse terminals 1, 2
Current signal > 23 mA Short-circuit Check wiring