Rockwell Automation Liqui-Flo AC GP Vector Drive Version 6.4 - Manual (Page 175)

Troubleshooting the Drive Using Error Codes 5-3
5.2 Identifying Fault Codes and Recovering
LiquiFlo drive fault codes are shown in table 5.2. To clear a single fault that has
occurred so that the drive can be started again, correct any problems indicated by the
fault code and press the STOP/RESET key on the keypad, or assert the fault reset
from the selected control source (P.000). Because multiple faults can occur and only
the first will be displayed, you must access the error log in order to view all of the faults
that have occurred. See section 5.3 for instructions on how to view the error log.
!
ATTENTION: DC bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnecting input power, wait five
minutes for the DC bus capacitors to discharge and then check the
voltage with a voltmeter to ensure the DC bus capacitors are discharged
before touching any internal components. Failure to observe this
precaution could result in severe bodily injury or loss of life.
Table 5.2 – List of Fault Codes
Code
Fault
Description Fault Cause Corrective Action
AIn Analog input signal
loss P.011 = 4 or 5 and 4 to 20 mA analog
input is below 1 mA. Verify that P.011 is set correctly.
Check that the analog input source
supply
≥1 mA.
bYC Incorrect precharge
status Precharge initiated and incorrect
precharge status is returned. Check operation of the precharge.
CHS Default parameter
restore (checksum
error) During drive operation:
Regulator board failure. Contact Reliance or replace Regulator
board.
After Regulator board replacement: Contact Reliance.
EC Earth current failure
(ground fault) Unintentional grounding of the output. Check isolation between ground and
output terminals. Possible leakage,
current sensor defects; replace
sensor.
EEr Non-volatile
memory write
failure Failure on write to non-volatile
memory. Connect CS3000 software to upload
parameters or record by hand. Then
replace Regulator board. Parameter
values will be lost when power is
cycled.
EL Encoder loss Drive is not detecting feedback from
the encoder. Check the connection between the
encoder and the drive. Check the
encoder/motor coupling.
FL Function loss Function loss input on control terminal
is opened. Check external interlocks at terminals
16, 20.
HId High time
identification
aborted Identification process for V/Hz has
been aborted. See H.019 for identification result.
HIL High line voltage Input voltage more than 15% above
nominal. Check actual line voltage against
U.018 or H.021.
HU High DC bus
voltage DC bus voltage too high (capacitor
protection). Check input line voltage; if necessary,
add transformer.
Deceleration time too short. Increase deceleration time
P.002/P.018/P.023 versus Maximum
Speed/Hz (P.004). Install DB option
with resistors.