Troubleshooting guide

2. Troubleshooting Switch Failures
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2.1.2 Replacing the switch and optional modules
The procedure to replace the switch and optional modules is described in the Hardware Instruction
Manual. Follow the instructions in the manual.
3 The power supply unit is not firmly installed
and is unstable.
Perform the following procedure:
1. Turn the power switch off.
2. If you are using a DC power supply unit, turn off the circuit
breaker at the distribution board.
3. When a cable latch is used to fix the power cable in
position, remove the cable latch from the cable.
4. Disconnect the power cable.
5. Remove and then insert the power supply unit again so that
it is firmly fixed.
6. Connect the power cable.
7. When possible, use a cable latch to fix the power cable in
position.
8. If you are using a DC power supply, turn on the circuit
breaker at the distribution board.
9. Turn the power switch on.
4 The measured input power supply is outside
the following range:
For 100 V AC: 90 to 132 V AC
For 200 V AC: 180 to 264 V AC
For -48 V DC: -40.5 to -57 V DC
Note: Take this action only if the input power
supply can be measured.
Ask the person responsible for the facility where the switch is
housed to take action regarding the input power supply.
No. Point to be checked Action