Siemens FibroLaser III Maintenance And Repair page 22

Fault Diagnostics
22
Building Technologies
CPS Fire Safety
The fuse has been blown
Switch off the controller, disconnect the power supply cable. Check the fuse with a
multi-meter or continuity tester and replace it if necessary.
Power supply, 12V to 48V DC:
–
Power supply, 100V to 240V AC:
–
The fuse has been blown repeatedly
If the fuse is again blown immediately after switching on, then there is either an
overvoltage, an incorrect fuse type or a defect present in one of the modules that
are to be supplied.
When an overvoltage and an incorrect fuse type has been excluded as the fault,
then the device must either be shipped back to the manufacturer or when it is
outside of the warranty period, qualified personnel can perform a repair on the
open controller.
First switch off the controller, disconnect the power supply cable, replace the fuse,
open the controller housing and continue with the following steps in order to
perform the fault diagnosis:
Internal wiring to the power supply is faulty (power supply 12V to 48V DC)
Verify the correct seating of the connectors of the wiring to the components on
–
the power supply panel.
Disconnect the transparent 6-pole input connector from the power supply.
–
Connect the power supply cable and switch on the power switch.
–
Check whether the correct supply voltage is present between the two outer pin
–
rows (red respectively black lead) of the transparent input connector for the
power supply.
Switch off the power switch and reconnect the transparent 6-pole input
–
connector to power supply.
Internal AC/DC voltage converter or internal wiring to the power supply is
faulty (power supply 100V to 240V AC)
These devices are fitted with an internal AC/DC voltage converter from 100V to
240V AC to an internal voltage of 24V DC.
Verify the correct seating of the connectors of the wiring to the components on
–
the power supply panel.
Disconnect the transparent 6-pole input connectors from the power supply.
–
Connect the power supply cable and switch on the power switch.
–
There is dangerous mains voltage present in the device!
Check whether the internal voltage of approx. 24V DC is provided between the
–
two outer pin rows (red or black lead) of the transparent input connector of the
power supply. If this is not the case, then the internal AC/DC voltage converter is
faulty. Replace the internal AC/DC voltage converter, repeat the check.
Switch off the power switch and reconnect the transparent 6-pole input
–
connector to power supply.
Fuse: 4 A (T), 5 x 20 mm
Fuse: 2 A (T), 250 V~, 5 x 20 mm
FL-III Maintenance and Repair
08.2012