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Troubleshooting the Drive
6-7
6.4.1 Identifying Alarm Codes and Recovering
Drive alarm codes are shown in table 6.2. Note that the alarm code will only be
displayed for as long as the problem exists. Once the problem has been corrected, the
alarm code will disappear from the display.
Table 6.2 – List of Alarm Codes
Code
Alarm
Description Alarm Cause Corrective Action
HIdc High DC bus
voltage
The DC bus is charged above the
trip threshold. (If U.018 > 415,
DC bus is above 741 VDC. If U.018
≤ 415, DC bus is above 669 VDC.)
Increase the deceleration time in
P.002, P.018.
Install optional snubber resistor
braking kit.
Verify that the AC input is within
specification. Install an isolation
transformer if required.
Check the actual line voltage against
U.018.
I-Ac V/Hz identification
procedure active
V/Hz identification procedure is
enabled and in progress.
Allow identification procedure to
finish.
Press keypad STOP/RESET to
cancel identification procedure if
desired.
I-En V/Hz identification
procedure
enabled
H.020 = On; V/Hz identification
procedure has been enabled but not
started.
Proceed with V/Hz identification
procedure, start drive and allow
procedure to begin. Display will
change to I-Ac when drive is started.
Change H.020 to OFF to cancel
identification and clear I-En if
desired.
LIL Low AC input line AC input line is low.
For SVC, indicates DC bus is being
regulated. No corrective action is
required.
Adjust line voltage parameter (H.021
or U.018) to match actual AC line
voltage.
S-Ac Vector self-tuning
active
Vector self-tuning is enabled and in
progress.
Allow vector self-tuning procedure to
finish.
Press keypad STOP/RESET to
cancel vector self-tuning procedure
if desired.
S-En Vector self-tuning
enabled
U.008 = On; vector self-tuning has
been enabled but not started.
Proceed with vector self-tuning, start
drive and allow self-tuning
procedure to begin. Display will
change to S-Ac when drive is
started.
Change U.008 to OFF to cancel
self-tuning and clear S-En if desired.