Service manual

990-1008, Revision 1, 4/99 16
6.3 Smart-UPS DP only operates 5 seconds after start-up. “Undervoltage Timer” active.
BATTERY
FUSES
DEFECTED
CROWBAR HAS
PROBABLY BEEN
ACTIVATED
CHECK CIRCUIT
IN CONNECTION
WITH MEASURING
OF CHARGE
CURRENT,
RELAYS, AND
IGBT’S. CHANGE
FUSES IF
NECESSARY.
CHANGE POWER
UNIT
CHECK THAT NONE OF
THE PINS ON THE
THREE 64-POLE PLUGS
ARE BENT AND THAT
CONNECTION IT OKAY.
PROBABLY BLOWN
FUSES IN POWER
UNIT(S)
ELSE FAULT IN POWER
UNIT AND/OR
CONTROLLER, FUSE ON
PIF, OR MEAS. &
SUPPLY
FAULT IN
CONTROLLER
YES
START
END
DC ON
POWER
UNIT?
DC FUSES ON
PU OKAY?
INVERTER
FUSES
OKAY?
CORRECT
OUTPUT
VOLTAGE?
YES YES
YES
NO
NO
NO
NO