Rockwell-automation 8510 AC Spindle Drive System User Manual Manual de usuario descargar pdf (Pagina 130)

Troubleshooting

Chapter 11

11-126

Table 11.F (Continued)

Problems that Occur while the Drive is Operating

Possible SolutionsProbable CauseProblem

Bus Undervolt

displayed - DC bus

voltage less than

the minimum

allowable level was

detected.

Adjust taps on transformer or add step-up transformer to keep AC

line voltage above 180V AC, 50/60 Hz.

Incoming 3 phase voltage is out of

tolerance.

Increase kVA rating of supply transformer to proper rating for drive

size (especially if fault occurs during accel or when the motor is

running under heavy load), see Table 8.C.

Incoming AC line impedance is

too high.

With drive operating in motoring or accel (if possible), check phase

to phase line voltages for balanced conditions and verify that voltage

is above 180V AC. Check all incoming line connections for

tightness.

An incoming 3 phase line is open,

or has high impedance.

AC Phase Loss

displayed - Loss of

one phase of

incoming AC line

detected by drive.

Refer to fault condition 4Refer to fault condition 4.

With drive operating in motoring or accel (if possible), check phase

to phase line voltages for balanced conditions. Check all incoming

line connections for tightness. If a three-phase motor is connected to

the AC line, a lost phase may not be detected by a voltage test on a

lightly loaded 8510 system.

An incoming 3 phase line is open,

or has high impedance.

Increase kVA rating of supply transformer to proper rating for drive

size. (Especially if fault occurs during accel or when the motor is

running under heavy load.) See Table 8.C.

Incoming AC line impedance is

too high.

Check IGBT modules M4, M5, and M6 (or IGBT2 in A04/A06

drive) according to procedure later in this chapter. Replace Power

Unit if IGBT is malfunctioning.

Malfunctioning IGBT module in

converter bridge.

Replace the Main Control Board (Gate Drive Board and possibly

CPU Board on A04/A06).

Malfunctioning printed circuit

board.

If problems were not found with other tests, replace the Power Unit.Malfunctioning Power Unit.

No.

1 2 ... 125 126 127 128 129 130 131 132 133 134 135 ... 153 154

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