7 Maintenance, Diagnostics, and Troubleshooting
This chapter includes maintenance and service guidelines,
status messages, warnings and alarms, and basic trouble-
shooting.
7.1 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, refer to
www.danfoss.com/contact/sales_and_services/
.
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 or LOP, 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.
7.2 Status Messages
When the frequency converter is in
Status mode
, status
messages are generated automatically and appear in the
bottom line of the display (see
Status
799RPM 7.83A 36.4kW
0.000
53.2%
1(1)
Auto
Hand
Off
Remote
Local
Ramping
Stop
Running
Jogging
.
.
.
Stand by
130BB037.11
1
2
3
1 Operating mode (see
2 Reference site (see
3 Operation status (see
)
Illustration 7.1 Status Display
to
describe the status messages shown.
Off
The frequency converter does not react to any
control signal until [Auto On] or [Hand On] is
pressed.
Auto On
The frequency converter is controlled from the
control terminals and/or the serial communi-
cation.
Hand On
The frequency converter is controlled by the
navigation keys on the LCP. Stop commands,
reset, reversing, DC brake, and other signals
applied to the control terminals override local
control.
Table 7.1 Operating Mode
Remote
The speed reference is given from external
signals, serial communication, or internal
preset references.
Local
The frequency converter uses [Hand On]
control or reference values from the LCP.
Table 7.2 Reference Site
AC Brake
[2] AC brake
is selected in
parameter 2-10 Brake
Function
. The AC brake overmagnetises the
motor to achieve a controlled slow down.
AMA finish OK
AMA was carried out successfully.
AMA ready
AMA is ready to start. Press [Hand On] to start.
AMA running
AMA process is in progress.
Braking
The brake chopper is in operation. Generative
energy is absorbed by the brake resistor.
Maintenance, Diagnostics, a...
Operating Instructions
MG33AQ02
Danfoss A/S © 07/2015 All rights reserved.
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Summary of Contents for VLT AutomationDrive FC 301
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