LSIS SV-iS7 series User Manual

Chapter 7 Checking and Troubleshooting
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7-1
7.1 Checking and Troubleshooting
7.1.1 Protective functions
1) Protection from output current and input voltage
Type Category Details
Over Load Latch
A failure occurs when you select the motor overload failure and
the load exceeds the set degree. Operation can resume after
PRT-20 is set at values other than 0.
Under Load Latch
A failure occurs when you select the underload protection function
and the motor load is within the set underload level. Operation can
resume after PRT-27 is set at values other than 0.
Over
Current1
Latch
A failure occurs when the inverter output exceeds 200% of the
rated current.
Over Voltage Latch
A failure occurs when the DC circuit voltage exceeds the
prescribed amount.
Low Voltage Level
A failure occurs when the DC circuit voltage goes down below the
prescribed degree.
Ground Trip Latch
A failure occurs when current above the prescribed amount flows
due to earth in the inverter output part. The earth causing current
varies according to the capacity of the inverter.
E-Thermal Latch
A failure occurs in order to prevent overheat during overload
operation according to the inverse time thermal characteristic.
Operation resumes if you set PRT-40 at values other than 0.
Out Phase
Open
Latch
A failure occurs when one of the three phases output of the
inverter is phase open. Operation resumes if you set PRT-05 bit 1
at 1.
In Phase
Open
Latch
A failure occurs when one of the three phases input of the inverter
is phase open. Operation resumes if you set PRT-05 bit 2 at 1.
Inverter OLT Latch
This is the inverse time thermal characteristic protection against
heat between 150% 1 minute to 200% 0.5 second on the basis of
the inverter rated current. 200% 0.5 second might differ according
to the inverter capacity.
Low Voltage2 Latch
If DC circuit’s voltage falls below rated value, failure ocurr during
inverter in operation,.
SafetyOpt Err s
During an emergency, a safety feature to shut off the inverter
output operation will occur.(see Chapter11 safety features)
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LSIS SV-iS7 series Specifications

General

Brand	LSIS
Model	SV-iS7 series
Category	Inverter
Language	English