Mitsubishi Electric FR-C500 Instruction Manual page 165

Errors (Alarms)
Operation Panel
Indication
Name
Description
Check point
Corrective action
Error code
Operation Panel
Indication
Name
Description
Check point
Corrective action
Error code
Operation Panel
Indication
Name
Description
Check point
Corrective action
Error code
0V1
Regenerative overvoltage shut-off during acceleration
When the main circuit DC voltage in the inverter rises to or above the
specified value due to excessive regenerative energy during acceleration,
the protective circuit is activated to stop the inverter output. The circuit may
also be activated by a surge voltage produced in the power supply system.
Check for too slow acceleration. (i.e. during descending acceleration with
lifting load)
• Decrease the acceleration time.
• Install a power factor improving reactor.
• Use the brake unit or power regeneration common converter (FR-CV) as
required.
H20
0V2
Regenerative overvoltage shut-off during constant speed
When the main circuit DC voltage in the inverter rises to or above the
specified value due to excessive regenerative energy during constant
speed, the protective circuit is activated to stop the inverter output.
The circuit may also be activated by a surge voltage produced in the power
supply system.
Check for sudden load change.
• Keep load stable.
• Install a power factor improving reactor.
• Use the brake unit or power regeneration common converter (FR-CV) as
required.
H21
0V3
Regenerative overvoltage shut-off during deceleration or stop
When the main circuit DC voltage in the inverter rises to or above the
specified value due to excessive regenerative energy during deceleration
or stop, the protective circuit is activated to stop the inverter output.
The circuit may also be activated by a surge voltage produced in the power
supply system.
Check for sudden speed reduction.
• Increase the deceleration time.
(Set the deceleration time that matches the moment of inertia of the load)
• Decrease the braking duty.
• Install a power factor improving reactor.
• Use the brake unit or power regeneration common converter (FR-CV) as
required.
H22
FR-PU04 OV During Acc
FR-PU04 Stedy Spd OV
FR-PU04 OV During Dec
156