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8. TROUBLESHOOTING
Alarm No.: A.33
Name: Overvoltage
Description
The value of the status display Pn (bus voltage) is "5" (overvoltage).
Detailed
display
Detailed
Name
Cause
Checking method
Result
Action
33.1
Main circuit
voltage error
1) The regenerative option is
used, but the set value of
the parameter is not
correct.
Check the set value of
parameter No.PA02.
Incorrect setting.
Correct the set value.
Correct setting.
Check 2).
2) Regenerative option is not
used.
Lead of the built-in
regenerative resistor or the
regenerative option is
open or disconnected.
Check the wiring and
the lead of the built-in
regenerative resistor
(regenerative option).
Open or
disconnected.
Connect correctly.
No problem.
Check 3).
3) Check the built-in
regenerative resistor
(regenerative option).
Check the resistance
value.
Error in the built-in
regenerative resistor
(regenerative
option).
When using the built-in
regenerative resistor,
replace the driver.
When using the
regenerative option,
replace the regenerative
option.
No problem.
Check 4).
4) Regenerative capacity is
insufficient.
Check if alarm occurs
when the deceleration
time constant is
increased.
Alarm does not
occur.
Use the regenerative
option if it is not used.
Increase the deceleration
time constant.
Alarm occurs.
Check 5).
5) Main circuit power supply
voltage is high.
Check if the main
circuit power supply
voltage is the following
or above.
LECSA2
□
- 253VAC
LECSA1
□
- 132VAC
LECSA2
□
:
Above 253VAC
LECSA1
□
:
Above 132VAC
Reduce the main circuit
power supply voltage.
LECSA2
□
:
253VAC or less
LECSA1
□
: 132VAC or less
Check 6).
6) Main circuit power supply
voltage is high. (A driver
for 1-phase 100VAC input
is used in the 200VAC
power supply circuit.)
Check the model of
driver.
The model of driver
is " LECSA1
□
".
The driver may
malfunction due to the
voltage input different from
the power specification.
Replace the servo driver
with a " LECSA1
□
"
model.
