ABB Standard drives,
ACS550
Copyright 10/11/2012 ABB.
All rights reserved.
eLearning
Fault tracing
Objectives
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After this module, you will be able to
Pay attention to product specific safety issues
Explain if the drives are field repaired or not
Carry out systematic fault tracing using fault tracing
tables and other materials
Describe the features of product diagnostics
List the meaning of fault indications
Trace alarms and signals with the fault logger
Describe how to get help
Safety (1/2)
Only qualified electricians are allowed to maintain the drive.
The ACS550-01/U1 frame sizes R1R4 are not field repaired
units. Never attempt to repair a malfunctioning unit; contact the
factory or your local Authorized Service Center for replacement.
Never work on the drive, motor cable or motor when input power
is applied. After disconnecting the input power, always wait for 5
minutes to let the intermediate circuit capacitors discharge
before you start working on the drive, motor or motor cable.
Always ensure by measuring with a multimeter that:
Copyright 10/11/2012 ABB.
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1. There is no voltage between drive input phases U1, V1 and
W1 and the frame.
2. There is no voltage between terminals UDC+ and UDC-, or
BRK+ and BRK-.
Safety (2/2)
Even when power is removed from the input terminals of the
ACS550, there may be dangerous voltage (from external
sources) on the terminals of the relay outputs R01 to R03.
Do not make any insulation or voltage withstand tests on the
drive.
The motor cable terminals on the drive are at a dangerously
high voltage when the input power is on, regardless of whether
the motor is running or not.
Copyright 10/11/2012 ABB.
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Even when the motor is stopped, dangerous voltage is present
at the power circuit terminals U1, V1, W1 and U2, V2, W2 and,
depending on the frame size, UDC+ and UDC-, or BRK+ and
BRK-.
General Information
If a unit drive is damaged, procedures are frame
specific
Frame sizes R1 to R4:
Defective units should not be repaired on site.
Exception: If the fault can be located in one of the following
options, the option can be replaced:
A Fieldbus-option, OREL-01, OTAC-01, FlashDrop or control
panels ACS-CP-xx
Frame sizes R5 to R8:
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The damaged components are replaced
R1R4
R5R6
R7
R8
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External causes of faults and warnings
Incorrect parameter settings, wrong motor data etc.
Incorrect AI signal level AI 0(2)-10 V or 0(4)-20 mA
Incorrect jumper setting of the AI signal
Incorrect sizing
Excessive ambient conditions
Supply network: voltage drops or missing supply
phases
Motor cables are too long
Improper functionality of the safety/limit switches
Know the circumstances!
Alarm and fault indications
The body of the drive
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LED indicators
Basic Control Panel
Alarm or fault code
Fault logger
LOC
F0010
FAULT
FWD
Assistant Control Panel
Alarm or fault message
The status LED
HELP button
Fault logger
LOC
FAULT
FAULT 1
OVERCURRENT
RESET 16:31 EXIT
Alarm and fault indications
LED indicators
Green LED (POWER)
When the green led is blinking the
drive is in alarm state
Red LED (FAULT)
When the red led is either lit and
steady or blinking the drive is in
fault state.
Copyright 10/11/2012 ABB.
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To reset the fault, switch off the drive
power or (press RESET in the control
panel)
If an external source for start command is selected and is active,
the ACS550 may start immediately after fault reset.
Alarm and fault indications
Basic Control Panel
Alarm or fault code
Fault logger
Last 3 fault codes
Time stamp
Time elapsed after power-on =
number of days + time in ticks
(1 tick = 2 seconds)
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7 actual values
LOC
FAULT
F0010
FWD
Alarm and fault indications
Assistant Control Panel
Alarm or fault message
LOC
HELP button
FAULT
FAULT 1
OVERCURRENT
LOC
HELP
Check: Excessive motor load,
insuff. accel time, faulty
motor, motor cables or
connections.
EXIT
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16:31
OK
Fault logger
Last 3 fault messages
Time and date
7 actual values
RESET
16:31
EXIT
Alarm and fault indications | Assistant Control Panel
Fault logger mode
LOC
1. Main menu
2. Fault log
EXIT
16:31
LOC
FAULT LOG
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ENTER
01
1: OVERCURRENT
27.01.04 21:20:18
10: PANEL LOSS
10: PANEL LOSS
LOC
16:31
DETAIL
OVERCURRENT
FREQ AT FLT
10.8 Hz
SPEED AT FLT
326 rpm
TORQUE AT FLT
EXIT
16:31
LOC
4. Diagnostic information
FAULT LOGGER
CLOCK SET
PAR BACKUP
EXIT
3. Snapshot of actual values
MAIN MENU
01
3
DIAG
HELP
Check: Excessive motor load,
insuff. accel time, faulty
motor, motor cables or
connections.
EXIT
16:31
OK
Fault tracing with the Users Manual
Check the fault / warning messages from the control
panel or the PC tool
Use the Fault / Alarm tables in the Users Manual
(Chapter: Fault tracing)
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Fault / Alarm tables
ALARM / FAULT MESSAGES
ACS550 Users manual (file size: >8 MB)
Click the above link, wait for the document to load, and click the Bookmarks tab on the left.
Find chapter Fault tracing Alarm / Fault messages generated by the drive.
Links will open in a new window
If no fault can be found
1. Check connected hardware
2. Check external causes, such as
Environment conditions
Supply and load variations
3. Check the parameters
4. Call the local ABB service representative. Have
the following information ready:
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The type code
A list of options
The serial number e.g. 109920033
The software revision (parameter 33.01)
A description of fault/problem
