SERVICE CALL CONDITIONS
B234/B235/B236/D101/D102/D103
4-112
SM
Converter Control Module
The following devices provide primary protection against current surges:
•
Energy save converter
•
1st Converter
•
2nd Converter
•
3rd Converter
•
4th Converter
Each converter generates the dc currents that are used by the CPU, motor drive
boards, and other parts of the mainframe. Each converter is provided with a
protection circuit to detect power surges.
As shown in Table 3, the power supply to the mainframe that is interrupted
depends on which protection circuit is opened as a result of a power surge:
•
The protection circuit of the energy save converter cuts all power if a problem
occurs in the energy save converter.
•
If the problem occurs in the 1st converter, power to the 1st, 2nd, 3rd, and 4th
converters is interrupted.
•
If the problem occurs in the 2nd converter, power to the 2nd, 3rd, and 4th
converters is interrupted.
•
If the problem occurs in the 3rd converter, power to only the 3rd converter is
interrupted.
•
If the problem occurs in the 4th converter, power to only the 4th converter is
interrupted.
Table 3: Converter Protection Circuits and Related Output Power Interrupts
Converter
Output Name
Energy
Save
1st
2nd
3rd
4th
VccE
O
Energy Save
VcaE
O
VccL
O
O
1st
Vcc
O
O
Vaa1
O
O
O
Vaa2
O
O
O
2nd
Vaa3
O
O
O
Vaa4
O
O
O
O
3rd
Vaa5
O
O
O
O
Vmm1
O
O
O
O
4th
Vmm2
O
O
O
O
Important!
To reset the machine after a protection circuit has opened:
1. Switch off the operation switch.
2. Switch off the main power switch.
3. Allow the machine to remain off for at least 5 minutes.
4. Turn on the main power switch.
