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ACH550-UH User’s Manual
Diagnostics
16
EARTH
FAULT
Possible ground fault detected in the motor or motor cables. The drive
monitors for ground faults while the drive is running and while the drive is
not running. Detection is more sensitive when the drive is not running and
can produce false positives.
Possible corrections:
• Check for/correct faults in the input wiring.
• Verify that motor cable does not exceed maximum specified length.
• A delta grounded input power supply and motor cables with high
capacitance may result in erroneous error reports during non-running
tests. To disable response to fault monitoring when the drive is not
running, use parameter 3023
WIRING
FAULT
. To disable response to all
ground fault monitoring, use parameter 3017
EARTH
FAULT
.
17
UNDERLOAD
Motor load is lower than expected. Check for and correct:
• Disconnected load.
• Group 37: USER LOAD CURVE.
18
THERM
FAIL
Internal fault. The thermistor measuring the internal temperature of the
drive is open or shorted. Contact your local ABB sales representative.
19
OPEX
LINK
Internal fault. A communication-related problem has been detected on the
fiber optic link between the OITF and OINT boards. Contact your local ABB
sales representative.
20
OPEX
PWR
Internal fault. Low voltage condition detected on OINT power supply.
Contact your local ABB sales representative.
21
CURR
MEAS
Internal
fault.
Current measurement is out of range. Contact your local ABB
sales representative.
22
SUPPLY
PHASE
Ripple voltage in the DC link is too high. Check for and correct:
• Missing mains phase.
• Blown fuse.
23
ENCODER
ERR
Not used (Available only with encoder and parameter Group 50).
23
ENCODER
ERR
The drive is not detecting a valid encoder signal. Check for and correct:
• Encoder presence and proper connection (reverse wired, loose
connection, or short circuit).
• Voltage logic levels are outside of the specified range.
• A working and properly connected Pulse Encoder Interface Module,
OTAC-01.
• Wrong value entered in parameter 5001
PULSE
NR
. A wrong value will
only be detected if the error is such that the calculated slip is greater
than 4 times the rated slip of the motor.
• Encoder is not being used, but parameter 5002
ENCODER
ENABLE
= 1
(
ENABLED
).
24
OVERSPEED
Motor speed is greater than 120% of the larger (in magnitude) of 2001
MINIMUM
SPEED
or 2002
MAXIMUM
SPEED
. Check for and correct:
• Parameter settings for 2001 and 2002.
• Adequacy of motor braking torque.
• Applicability of torque control.
• Brake chopper and resistor.
25
RESERVED
Not used as of the publication of this manual.
26
DRIVE
ID
Internal fault. Configuration Block Drive ID is not valid. Contact your local
ABB sales representative.
Fault
Code
Fault Name In
Panel
Description and Recommended Corrective Action
Summary of Contents for ACH550-BCR
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Page 36: ...1 32 ACH550 UH User s Manual Installation ...
Page 70: ...1 66 ACH550 UH User s Manual Application macros ...
Page 335: ...ACH550 UH User s Manual 1 331 Technical data ...
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