Check Auxiliary Power Supply Control Board - Powertronix Mizar-Alcor Service Manual

Output dc voltages status is monitored by a green Led D23 that have to be light while the
Power Supply is running
Name Description
D23 Power Supply status

3.2.3 Check Auxiliary Power Supply Control Board

• 1-Check Input Voltage
1a-DC source Coming from DC BUS
(check between R57& R58 DC BUS Voltage >800Vdc)
1b-AC source Coming from AC Reserve Line
(check between R53 - R54 – R55 > 400Vac)
1c-AC source Coming from AC Mains Line
(check between R50 - R51 – R52 > 400Vac)
• 2-Check Output Voltage
3a-DC Output 7.5Volt dc
(check between TP7&TP9 DC Voltage ->7.5Vdc)
3b--DC Output 15Volt dc
(check between TP7&TP4 DC Voltage ->15Vdc)
3c--DC Output Isolated 15Volt dc
(check between TP14&TP12 DC Voltage ->15Vdc)
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Safe-Life Battery remote UPS's location function
During battery discharging , the battery voltage is monitored by the control board ; when
the battery voltage reaches the minimum value the inverter is stopped ;
After few minutes (If SLB function is enabled) the control board sends an off command to
the dc/dc converter that switches off itself , avoiding the deep discharge of the UPS
battery .
The dc/dc converter turns automatically on when mains or reserve ac voltages come
back present .
P+15 Volt Output Present
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R&D – SERVICE MANUAL DT0488
ON
P+15 Volt Output not
OFF
Present
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