Fuji Electric BUC S-69D, Instruction Manual

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[ 6 ] Hardware error
Problem The LSI on the power supply printed circuit board (PCB) malfunctions.
Possible Causes What to Check and Suggested Measures
(1) The dynamic breaking unit
affected by strong electrical
noise.
Check if appropriate noise control measures have been implemented (e.g. correct
grounding and routing of signal wires, communications cables, and main circuit
wires).
 Implement noise control measures.
(2) Short circuit on the printed
circuit board(s).
Check the printed circuit board(s) for short circuits, accumulation of dust or dirt.
 Ask your Fuji Electric representative to repair the dynamic breaking unit.
(3) The control circuit PCB or
power supply PCB is
defective.
The control circuit PCB or power supply PCB (including the gate PCB) needs to
be replaced.
 Ask your Fuji Electric representative to repair the dynamic breaking unit.
[ 7 ] Heat sink overheat
Problem Temperature around heat sink has risen abnormally.
[ 8 ] Dynamic breaking unit internal overheat
Problem Temperature inside the dynamic breaking unit has exceeded the allowable limit.
Possible Causes What to Check and Suggested Measures
(1) The ambient temperature
exceeded the range of the
dynamic breaking unit
specification.
Measure the temperature around the dynamic breaking unit.
 Lower the temperature around the dynamic breaking unit (e.g., ventilate the
cabinet where the dynamic breaking unit is mounted).
Check if there is sufficient clearance around the dynamic breaking unit.
 Change the mounting place to ensure the clearance.
(2) Ventilation path is blocked.
Check if the heat sink is not clogged.
 Clean the heat sink.
(For the cleaning procedure, contact your Fuji Electric representative.)
(3) Cooling fan's airflow volume
decreased due to the service
life expired or failure.
Visually check whether the cooling fan rotates normally.
 Replace the cooling fan.
(Contact your Fuji Electric representative.)
(4) Temperature detection circuit
failure (Thermistor wire
break).
 Ask your Fuji Electric representative to repair the dynamic breaking unit.
[ 9 ] Inter- dynamic breaking unit communications link error
Problem A communications link error has occurred between high-speed serial communication-capable terminal block
options (OPC-VG1-TBSI).
Possible Causes What to Check and Suggested Measures
(1) The optical cable is
disconnected or inserted
poorly into the connector.
 Connect the optical cable fully.
(2) The optical cable is bundled or
bent with the bend radius of 35
mm or less.
 Increase the bend radius to at least 35 mm.
(3) The optical cable or connectors
on the inverter were exposed
to intense light (e.g., direct
sunlight or strobe light)
 Do not expose the optical cable or the connectors to intense light.