II K 6-24
Operating Instructions
6.4 Troubleshooting
6.4.1 Display of status, alarm and fault si-
gnals
The available signals (messages) for thyristor power
converters series DCS 400 are subdivided:
• Converter's 7-segment LED
(located behind the Panel)
General messages
Starting errors
Fault signals
Alarm signals
• Panel LCD display
• Panel LEDs
A seven segment display on the control board
SDCS-CON-3A of the thyristor power converters se-
ries DCS 400 is used to show general messages,
starting errors, fault and alarm signals. The signals
(messages) are displayed as codes. If the codes
consist of several parts, the characters/individual
digits will be indicated respectively e.g.:
⇒
⇒
F 14 = Armature Overcurrent
Ý Ü ß
In addition to the seven segment display, the LCD of
the control panel DCS 400 PAN will be able to show
the fault and alarm signals as well as the diagnostic
messages as clear text.
Note: The languages available for display as text
depend on Parameter 7.01.
Diagnosis [7.03]
Fault Word 1 [7.09]
Fault Word 2 [7.10]
Fault Word 3 [7.11]
Alarm Word 1 [7.12]
Alarm Word 2 [7.13]
Alarm Word 3 [7.14]
contain diagnosis messages and several fault and
alarm signals as a binary code. For subsequent
evaluation the information is available via serial inter-
faces using parameter transmission.
Last alarm signal is coded as an individual error code
in the location Volatile Alarm [7.08].
Also a Faultlogger is available where the last 16 faults
and alarms occured are stored. Read the messages
by using panel function 'Read Faultlogger' or using
the PC tool 'Drives Window Light' to recognize the
fault and alarm history.
6.4.2 General messages
The general messages will only be shown on the
seven segment display of the control board SDCS-
CON-3A.
Panel Text
DCS400PAN
Definition
Remark
8. COMM LOSS Program is not running (1)
. normal output display Normal situation, no fault / no
alarm signal
(1)
Visible for short time during boot up.
Visible during Boot mode of Firmware Download Program.
Unit should be switched off. Please check jumper S4=3-4 and
S5=5-6 and switch on electrically; if fault occurs again, the PCB
SDCS-CON-3A has to be checked and if necessary to be chan-
ged.
6.4.3 Starting errors (E)
The starting errors will only be shown on the seven
segment display of the control board SDCS-CON-3A.
With starting errors it will not be possible to start the
drive.
Panel Text
DCS400PAN
Definition
Remark
E01 COMM LOSS Internal FPROM checksum error (1)
E02 COMM LOSS Reserved for External FPROM
checksum error
(1)
E03 COMM LOSS Internal error in even address of
RAM
(1)
E04 COMM LOSS Internal error in odd address of
RAM
(1)
E05 COMM LOSS
Invalid board
(1)
E06 COMM LOSS Software hold by watchdog func-
tion
(1)
(1) Unit should be switched off and on electrically; if fault occurs again
please contact local ABB service center.
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