Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Manual do Utilizador descarregar pdf (Página 161)

10-12

Troubleshooting

Power Module and Interface

Board Resistance Check (cont.)

24–135 Amp

Remove the control module per the instructions beginning on page

10-6. Refer to Figure 10.7 for power module pin identification.

Shorted SCR Test

1. Using an ohmmeter, measure the resistance between the line and

load terminals of each phase on the controller.

The resistance should be greater than 10,000 ohms.

Feedback Resistance

1. Measure resistance between pins 1 and 2.

Resistance should be 19,000 ohms, +/–5%.

2. Measure resistance between pins 7 and 8.

Resistance should be 19,000 ohms +/–5%.

Gate Lead Resistance

1. Measure resistance between pins 2 and 3.

Resistance should less than 100 ohms.

2. Measure resistance between pins 6 and 7.

Resistance should be less than 100 ohms.

Thermistor Resistance

1. Measure resistance between pins 4 and 5.

Resistance should be less than 150 ohms.

If the power module fails any of the above tests, replace it.

Figure 10.7 Pin Locations for Power Module Resistance Check

1 2 ... 156 157 158 159 160 161 162 163 164 165 166 ... 188 189

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Rockwell-automation 150 USE MN/SMC DIALOG + CONTROLLER Manual do Utilizador Página 161