374
Diagnostics and maintenance
ACH550-01 User's Manual
14
EXT
FAULT
1
Digital input defined to report the first
external fault is active. See parameter 3003
EXTERNAL
FAULT
1.
15
EXT
FAULT
2
Digital input defined to report the second
external fault is active. See parameter 3004
EXTERNAL
FAULT
2.
16
EARTH
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.
17
OBSOLETE
Not
used.
18
THERM
FAIL
Internal fault. The thermistor measuring the
internal temperature of the drive is open or
shorted. Contact your local ABB
representative.
19
OPEX
LINK
Internal fault. A communication-related
problem has been detected between the
control and main circuit boards. Contact your
local ABB representative.
20
OPEX
PWR
Internal fault. Exceptionally low voltage
detected on the main circuit board. Contact
your local ABB representative.
21
CURR
MEAS
Internal fault. Current measurement is out of
range. Contact your local ABB
representative.
22
SUPPLY
PHASE
Ripple voltage in the DC link is too high.
Check for and correct:
• missing mains phase
• blown fuse.
23
RESERVED
Not used.
Fault
code
Fault name in
the panel
Description and
recommended corrective action
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