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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 servo
amplifier.
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.
MR-JN- A: 253VAC
MR-JN- A1: 132VAC
MR-JN- A: Above
253VAC
MR-JN- A1: Above
132VAC
Reduce the main circuit
power supply voltage.
MR-JN- A: 253VAC
or less
MR-JN- A1:
132VAC or less
Check 6).
6) Main circuit power supply
voltage is high. (A servo
amplifier for 1-phase
100VAC input is used in
the 200VAC power supply
circuit.)
Check the model of
servo amplifier.
The model of servo
amplifier is "MR-JN-
A1".
The servo amplifier may
malfunction due to the
voltage input different from
the power specification.
Replace the servo
amplifier with a "MR-JN-
A" model.
Summary of Contents for MELSERVO-JN Series
Page 31: ... 22 MEMO ...
Page 49: ...2 6 2 INSTALLATION MEMO ...
Page 181: ...5 30 5 DISPLAY AND OPERATION SECTIONS MEMO ...
Page 199: ...6 18 6 GENERAL GAIN ADJUSTMENT MEMO ...
Page 303: ...11 46 11 OPTIONS AND PERIPHERAL EQUIPMENT MEMO ...
Page 351: ...12 48 12 SERVO MOTOR MEMO ...
Page 445: ...13 94 13 POSITIONING MODE MEMO ...