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
adjustable frequency drive is maintenance-free throughout
its designed lifetime. To prevent breakdown, danger, and
damage, examine the adjustable frequency drive 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 adjustable frequency drive is connected to AC
line power, DC power 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
by means of an external switch, a serial bus command,
an input reference signal from the LCP or LOP, via
remote operation using MCT 10 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 any parameters.
•
The adjustable frequency drive, motor, and any
driven equipment must be fully wired and
assembled when the adjustable frequency drive
is connected to AC line power, DC power
supply, or load sharing.
7.2 Status Messages
When the adjustable frequency drive is in Status mode,
status messages are generated automatically and appear in
the bottom line of the display (see Figure 7.1).
Status
799RPM 7.83A 36.4kW
0.000
53.2%
1(1)
Auto
Hand
O
Remote
Local
Ramping
Stop
Running
Jogging
.
.
.
Stand by
130BB037.11
1 2 3
1
Operation mode (see Table 7.1)
2
Reference site (see Table 7.2)
3
Operation status (see Table 7.3)
Figure 7.1 Status Display
Table 7.1 to Table 7.3 describe the displayed status
messages.
Off
The adjustable frequency drive does not react
to any control signal until [Auto On] or [Hand
On] is pressed.
Auto On The adjustable frequency drive is controlled
from the control terminals and/or the serial
communication.
Hand On The adjustable frequency drive 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 Operation Mode
Remote
The speed reference is given from external
signals, serial communication, or internal
preset references.
Local The adjustable frequency drive uses [Hand On]
control or reference values from the LCP.
Table 7.2 Reference Site
Maintenance, Diagnostics an...
Instruction Manual
38 Danfoss A/S © Rev. 09/2014 All rights reserved. MG33AP22
77
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