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Quick Reference of Parameters, Alarms and Faults
Fault / Alarm
F0151
Main firmware version is different
Incomp. Main sw
from the plug-in firmware version.
Version
F0179
Internal fan with speed (P0036)
Fan Low Speed
under 2/3 of rated fan speed.
F0182
Pulse feedback circuit fault of the
Pulse Feedback
output voltage.
Fault
Note: it may be turned off in
P0397.
F0228
It indicates serial communication
Telegram
fault. It indicates the equipment
Reception
stopped receiving valid serial
Timeout
telegrams for a period longer than
the setting in P0314.
F0233
This failure indicates that the CAN
No Supply on
interface has no supply between
CAN Interface
pins 1 and 5 of the connector.
F0234
Bus off error detected on the CAN
Bus Off
interface.
F0235
CANopen communication error
Node Guarding/
control detected communication
Heartbeat
error using the guarding
mechanism.
F0236
Fault indicates that the DeviceNet
Idle Master
network master is in idle mode.
F0237
Fault that indicates that one or
DeviceNet
more DeviceNet connections
Connection
timed out.
Timeout
F0238
It indicates that the inverter
Profibus DP
received the command from the
Interface in Clear
Profibus DP network master to go
Mode
into clear mode.
26 | MW500
Description
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Possible Causes
Blank memory on plug-in module (1
Data backup fault during power-down.
Internal fan failure.
Hardware identification fault; compare P0295 and
P0296 to the inverter identification label.
Inverter internal circuits fault.
Pulse feedback input circuit fault.
Check network installation, broken cable or fault/
poor contact on the connections with the network,
grounding.
Ensure the master always sends telegrams to the
equipment in a time shorter than the setting in P0314.
Disable this function in P0314.
Measure if there is voltage within the allowed range
between the pins 1 and 5 of the CAN interface
connector.
Check if the supply cables are not misconnected or
inverted.
Check for contact problems on the cable or connector
of the CAN interface.
Check for short circuit on the CAN circuit transmission
cable.
Check if the cables are not misconnected or inverted.
Check if all the network devices use the same baud
rate.
Check if the termination resistors are with correct
values and have been installed only at the end of the
main bus.
Check if the CAN network was properly installed.
Check the times set on the master and on the slave
to exchange messages. In order to prevent problems
due to transmission delays and time counting, it is
recommended that the values set for error detection
by the slave be multiples of the times set for message
exchange on the master.
Check if the master is sending the guarding telegrams
in the time set.
Check the problems in the communications that may
cause missing telegrams or transmission delays.
Set the switch that controls the master operation for
Run or the corresponding bit on the configuration word
of the master software. If further information is needed,
refer to the documentation of the master used.
Check the network master status.
Check network installation, broken cable or fault/poor
contact on the connections with the network.
Check the network master status, ensuring it is in the
run mode.
power-up).
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