8 Maintenance, Diagnostics, and Troubleshooting
8.1 Maintenance and Service
Under normal operating conditions and load profiles, the
frequency converter is maintenance-free throughout its
designed lifetime. To prevent breakdown, danger, and
damage, examine the frequency converter for terminal
connections tightness, dust entry, and so on 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
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 fieldbus 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 frequency converter from the
mains.
•
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.
8.2 Warning and Alarm Types
Warning/
alarm type
Description
Warning
A warning indicates an abnormal operating
condition that leads to an alarm. A warning stops
when the abnormal condition is removed.
Alarm
An alarm indicates a fault that requires
immediate attention. The fault always triggers a
trip or trip lock. Reset the drive after an alarm.
Reset the drive in any of 4 ways:
•
Press [Reset]/[Off/Reset].
•
Digital reset input command.
•
Serial communication reset input command.
•
Auto reset.
Trip
When tripping, the drive suspends operation to prevent
damage to the drive and other equipment. When a trip
occurs, the motor coasts to a stop. The drive logic
continues to operate and monitor the drive status. After
the fault condition is remedied, the drive is ready for a
reset.
Trip lock
When trip locking, the drive suspends operation to prevent
damage to the drive and other equipment. When a trip
lock occurs, the motor coasts to a stop. The drive logic
continues to operate and monitor the drive status. The
drive starts a trip lock only when serious faults occur that
can damage the drive or other equipment. After the faults
are fixed, cycle the input power before resetting the drive.
8.3 Warning and Alarm Display
Setup 1
Status
Quick
Menu
Main
Menu
130BD111.10
Illustration 8.1 Warning Display
Maintenance, Diagnostics, a...
Operating Guide
MG07A402
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