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 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 frequency converter
after an alarm.
Reset the frequency converter in any of 4 ways:
•
Press [Reset]/[Off/Reset].
•
Digital reset input command.
•
Serial communication reset input command.
•
Auto reset.
Trip
When tripping, the frequency converter suspends
operation to prevent damage to the frequency converter
and other equipment. When a trip occurs, the motor coasts
to a stop. The frequency converter logic continues to
operate and monitor the frequency converter status. After
the fault condition is remedied, the frequency converter is
ready for a reset.
Trip lock
When trip locking, the frequency converter suspends
operation to prevent damage to the frequency converter
and other equipment. When a trip lock occurs, the motor
coasts to a stop. The frequency converter logic continues
to operate and monitor the frequency converter status.
The frequency converter starts a trip lock only when
serious faults occur that can damage the frequency
converter or other equipment. After the faults are fixed,
cycle the input power before resetting the frequency
converter.
8.3 Warning and Alarm Display
Setup 1
Status
Quick
Menu
Main
Menu
130BD111.10
Illustration 8.1 Warning Display
An alarm or trip-lock alarm shows in the display along with
the alarm number.
Setup 1
Status
Quick
Menu
Main
Menu
130BD112.10
Illustration 8.2 Alarm/Trip Lock Alarm
Maintenance, Diagnostics, a...
Operating Instructions
MG07A102
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