Honeywell BacNet protocol, Installation And User Manual

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Fault tracing
Honeywell
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7. Fault tracing
When an unusual operating condition is detected by the VFD control diagnostics, the drive ini-
tiates a notification visible, for example, on the keypad. The keypad will show the ordinal num-
ber of the fault, the fault code and a short fault description.
The fault can be reset with the Reset button on the control keypad or via the I/O terminal. The
faults are stored in the Fault history menu which can be browsed. The different fault codes you
will find in the table below. This fault table presents only the faults related to the fieldbus in use.
7.1 Typical fault conditions
Table 17. Typical fault conditions
Fault condition Possible cause Remedy
Termination
resistor
Missing or excessive termination resistor.
Install termination resistors
at both ends of the fieldbus
line.
Cabling
• Supply or motor cables are located
too close to the fieldbus cable
• Wrong type of fieldbus cable
• Too long cabling
Grounding Inadequate grounding.
Ensure grounding in all
points on the net
Connections
Faulty connections.
• Excessive stripping of cables
• Conductors in wrong terminals
• Too loose connections of conduc-
tors
Parameter
• Faulty address
• Overlapping slave addresses
• Wrong baud rate
• Wrong control place selected