Maintenance, Diagnostics And Troubleshooting; Maintenance And Service; Warning And Alarm Types; Warning And Alarm Display - Danfoss VLT Midi Drive FC 280 Instruction Manual

Maintenance, Diagnostics an...

8 Maintenance, Diagnostics and Troubleshooting

8.1 Maintenance and Service

Under normal operating conditions and load profiles, the
adjustable frequency drive is maintenance-free throughout
its designed lifetime. To prevent breakdown, danger and
damage, examine the frequency converter at regular
intervals depending on the operating conditions. Replace
worn or damaged parts with original spare parts or
standard parts. For service and support, contact the local
Danfoss supplier.
WARNING
UNINTENDED START
When the frequency converter is connected to AC mains,
DC supply or load sharing, the motor may start at any
8 8
time. Unintended start during programming, service or
repair work can result in death, serious injury or
property damage. The motor can start with an external
switch, a serial communication bus command, an input
reference signal from the LCP, via remote operation using
MCT 10 Set-up Software or after a cleared fault
condition.
To prevent unintended motor start:
•
Disconnect the adjustable frequency drive from
line power.
•
Press [Off/Reset] on the LCP before
programming parameters.
•
Completely wire and assemble the frequency
converter, motor and any driven equipment
before connecting the frequency converter to
AC mains, DC supply or load sharing.
42
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VLT Midi Drive FC 280

8.2 Warning and Alarm Types

Warning/
alarm type
Warning
Alarm
Trip
When tripping, the adjustable frequency drive suspends
operation to prevent damage to the adjustable frequency
drive and other equipment. When a trip occurs, the motor
coasts to a stop. The adjustable frequency drive logic
continues to operate and monitor the adjustable frequency
drive status. After the fault condition is remedied, the
adjustable frequency drive is ready for a reset.
Trip lock
When trip locking, the adjustable frequency drive suspends
operation to prevent damage to the adjustable frequency
drive and other equipment. When a trip lock occurs, the
motor coasts to a stop. The adjustable frequency drive
logic continues to operate and monitor the adjustable
frequency drive status. The adjustable frequency drive
starts a trip lock only when serious faults occur that can
damage the adjustable frequency drive or other
equipment. After the faults are fixed, cycle the input power
before resetting the adjustable frequency drive.

8.3 Warning and Alarm Display

Setup 1
Figure 8.1 Warning Display
Danfoss A/S © 11/2015 All rights reserved.
Description
A warning indicates an abnormal operating
condition that leads to an alarm. A warning stops
when the abnormal condition is removed.
An alarm indicates a fault that requires
immediate attention. The fault always triggers a
trip or trip lock. Reset the adjustable frequency
drive after an alarm.
Reset the adjustable frequency drive in any of
four ways:
•
Press [Reset]/[Off/Reset].
•
Digital reset input command.
•
Serial communication reset input command.
•
Auto reset.
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