Carrier D2-3466-2 Manuale Utente

Troubleshooting the Drive

6-7

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

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.