User Guide

Honeywell • 32 FAULT TRACING
7. FAULT TRACING
When an unusual operating condition is detected by the AC drive control diagnostics, the drive
initiates a notification visible, for example, on the keypad. The keypad will show the ordinal
number 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.
NOTE! If you need support in problems related to BACnet, send a description of the problem
together with the Drive Info File taken with PC tool to your local support. In case of BACnet IP
protocol please send also a "Wireshark" log from the situation if applicable.
7.1 Typical fault conditions
Fault condition Possible cause Remedy
Termination
resistor
Missing or excessive termination resis-
tor.
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