Troubleshooting The Power Supply - Siemens SIMATIC TI555 System Manual

7.7

Troubleshooting the Power Supply

WARNING
!
WARNING
!
Troubleshooting
7-12
Complete the following steps when troubleshooting the power supply.
1. Ensure that the power budget has not been exceeded and that the
module is properly installed.
2. After making sure the backup battery is on (so the program will not be
lost), disable all power to the system for at least 90 seconds.
3. Restore system power.
4. If the problem still exists, turn off power to the system.
To minimize risk of shock hazard, always turn off the controller
before removing or installing a CPU or I/O module.
Failure to do so could cause death or serious injury and/or damage
to equipment.
Ensure that controller power is turned off before removing or
installing a CPU or I/O module.
5. Remove the power supply module from the base. This step is not
required for the PPX:505–6663 power supply.
a. Ensure that the jumper in the back of the power supply module is
set to the correct line voltage.
b. If the voltage has been set incorrectly, wait at least one minute
before touching the jumper. Then move the jumper to the
appropriate quick-connect pin.
6. Ensure that the wires attached to the terminal screws on the bezel are
secure and that the user-supplied power source is functional.
7. Verify that the fuse (located on the bezel) has not opened. Follow steps
8. through 12. to replace the fuse, if necessary, with the appropriate
fuse. See Figure 7-2 .
Before you replace a fuse, disable all power to the base .
Failure to do so could cause death or serious injury and/or damage
to equipment.
Disable all power to the base before replacing a fuse.
TI545/TI555 System Manual