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Fault
Fault name in
code
the panel
14
EXT FAULT
15
EXT FAULT
16
EARTH FAULT
17
OBSOLETE
18
THERM FAIL
19
OPEX LINK
20
OPEX PWR
21
CURR MEAS
22
SUPPLY PHASE
23
RESERVED
374
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recommended corrective action
1
Digital input defined to report the first
external fault is active. See parameter 3003
EXTERNAL FAULT
2
Digital input defined to report the second
external fault is active. See parameter 3004
EXTERNAL FAULT
The load on the input power system is out of
balance.
• Check for/correct faults in the motor or
motor cable.
• Verify that motor cable does not exceed
max. specified length.
• Decrease the detection level for earth
fault with parameter 3028 earth fault lvl.
Note: Disabling ground (earth fault) may
void the warranty.
Not used.
Internal fault. The thermistor measuring the
internal temperature of the drive is open or
shorted. Contact your local ABB
representative.
Internal fault. A communication-related
problem has been detected between the
control and main circuit boards. Contact your
local ABB representative.
Internal fault. Exceptionally low voltage
detected on the main circuit board. Contact
your local ABB representative.
Internal fault. Current measurement is out of
range. Contact your local ABB
representative.
Ripple voltage in the DC link is too high.
Check for and correct:
• missing mains phase
• blown fuse.
Not used.
ACH550-01 User's Manual
Description and
1.
2.
Diagnostics and maintenance
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