88
9
TROUBLESHOOTING
When a fault occurs where the inverter trips itself and the option unit, check the inverter's operation panel, the LED on the
option unit, and the following checkpoints to identify the cause, then take appropriate countermeasures. If the fault does not
correspond to any of the following faults or if you have any other problem, please contact your sales representative.
Operation
panel display
on the inverter
LED on
FR-A8NP
Possible cause
Checkpoint / troubleshooting
0.00
OFF
The option
unit is not
operating.
The option unit is not mounted
properly.
Check if the option unit is mounted properly.
PROFIBUS communication is not
established with the master.
(Incorrect node address setting)
Set the same node address with the master on the
inverter (FR-A8NP) using the node address switches.
(Turn OFF, then ON the power supply after changing the
node address setting on the inverter (FR-A8NP).)
PROFIBUS communication is not
established with the master.
(Incorrect GSD file has been
registered.)
Register the correct GSD file with a configuration
software, and set the network configuration to the
master.
PROFIBUS communication is not
established with the master.
(Incorrect wiring)
Check the wiring of the option unit.
D+ PROFIBUS transmitting/receiving data+ (B line)
D- PROFIBUS transmitting/receiving data- (A line)
—
Reset the inverter.
Perform all parameter clear to initialize all parameter
settings, then turn ON the inverter power again.
The network
is unstable.
The network cables are not
connected correctly.
Check if the network cables are connected properly
between the nodes.
The PROFIBUS communication is
not established with the master.
(Unstable bus line)
Connect a terminating resistor. If a terminating resistor
has been already connected, check if it is connected
properly.
Summary of Contents for FR-A8NP
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