TOSHIBA

Drive Warning Displays and Explanations

DC BUS UNDERVOLTAGE

Cause: The drive's DC bus voltage went below approximately 200 VDC (230 volt drive), or 395 VDC (460 volt drive), for at least the time entered in Item 165, UNDERVOLTAGE DETECT

TIME.

Comments: Item 164, UNDERVOLTAGE TRIP SELECTION turns the ability to undervoltage trip on/off.

CONTROL POWER LOW

Control Power low warning voltage levels are sensed on DC bus and are set slightly less than DC BUS UNDERVOLTAGE levels.

OVERLOAD

A flashing overcurrent display means that the drive is outputting more than 110% of its rated current. If Item 161, OVERLOAD SELECTION is set to "1" or "3" (soft stall on), the drive's output frequency will automatically decrease in an effort to reduce current. See suggestions for remedying an inverter overload trip on page 10-4. Setting one of the monitor's functions (Items 289-292) to "10" will give an indication of how close a drive is to tripping.

OVERCURRENT

A flashing overcurrent display means that the drive is stalling. (Stall level is set by Item 160, STALL PROTECTION CURRENT LEVEL). The drive's output frequency will automatically decrease.

OVERVOLTAGE

A flashing overvoltage display means that the drive's DC bus has exceeded 360 VDC (230 volt drive), or 720 VDC (460 volt drive).

OVERHEAT

A flashing overheat display means that the drive's heat sink temperature has exceeded 84oC. Display dissappears when heatsink temperature reaches 80oC.

COMM

A flashing comm display means that the drive has momentarily lost communications. Display will clear when follower receives valid reference. Cycling power or reinitializing drive will clear warning.

Inspection

Specifications Precautions

Wiring

Jumpers

Panel

Keypad

Programming Parameters

Service

Dimensions

Index

10 - 7

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Toshiba H3 manual Drive Warning Displays and Explanations, DC BUS Undervoltage

H3 specifications

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