YASKAWA VS MINI J7 Manuale delle Istruzioni Scaricare il pdf (Pagina 104)

104

< Corrective Actions of Models with Digital Operator >

Alarm Display and Contents

Alarm Display

Inverter

Status

Explanation

Causes and

Corrective Actions

Digital

Operator

RUN ALARM

(Green) (Red)

Blinking

Warning

Fault contacts

do not change

state.

UV (Main circuit low voltage)

Main circuit DC voltage drops

below the low-voltage

detection level while the

inverter output is OFF.

200V: Main circuit DC voltage

become lowered below

approx. 200V (160V for

single phase)

400V:Main circuit DC voltage

become lowered below

approx. 400V.

Check the following:

• Power supply

voltage

• Main circuit power

supply wiring is

connected.

• Terminal screws are

securely tightened.

Blinking

OV (Main circuit over voltage)

Main circuit DC voltage

exceeds the over voltage

detection level while the

inverter output is OFF.

Detection level: approx. 410V

or more (approx. 820V for

400V class).

Check the power

supply voltage.

Blinking

OH (Cooling fin overheat)

Intake air temperature rises

while the inverter output is

OFF.

Check the intake air

temperature.

Blinking

CAL (MEMOBUS

communications waiting)

Correct data has not been

received from the PLC when

the parameters n02

(operation command

selection) is 2 or n03

(frequency reference

selection) is 6, and power is

turned ON.

Check communication

devices and

transmission signals.

: ON : Blinking : OFF

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YASKAWA VS MINI J7 Manuale delle Istruzioni Pagina 104

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