Fuji Electric FRENIC-Ace series, Руководство пользователя

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6.3 If an Alarm Code Appears on the LED Monitor
6-22
[ 36 ]
pbf
Charge circuit fault
Phenomena The magnetic contactor for short-circuiting the charging resistor failed to work.
Possible Causes Check and Measures
(1) The control power was not
supplied to the magnetic
contactor intended for
short-circuiting the charging
resistor.
Check that, in normal connection of the main circuit (not a connection
via the DC link bus), the connector (CN R) on the power printed circuit
board (power PCB) is not inserted to NC.

Insert the connector (CN R) to FAN.
Check whether you quickly turned the circuit breaker ON and OFF to
confirm safety after cabling/wiring.

Wait until the DC intermediate circuit voltage has dropped to a
sufficiently low level and then release the current alarm. After that,
turn ON the power again. Do not turn the circuit breaker ON and
OFF quickly.
(Turning ON the circuit breaker supplies power to the control circuit
to the operation level (lighting the LEDs on the keypad) in a short
period. Immediately turning it OFF even retains the control circuit
power for a time, while it shuts down the power to the magnetic
contactor intended for short-circuiting the charging resistor since the
contactor is directly powered from the main power. Under such
conditions, the control circuit can issue a turn-on command to the
magnetic contactor, but the contactor without power cannot operate
normally. This state is regarded as abnormal, causing an alarm.)
[ 37 ]
pg
PG wire break
Phenomena The pulse generator (PG) wire has been broken somewhere in the circuit.
Possible Causes Check and Measures
(1) Not assigned “PIN” under
positioning control with pulse
counter.
Check whether a “Pulse train input [PIN]” is assigned to E05.

Correct the assignment.
(2) PG(Z phase) wire break under
master-follower operation.
Check whether the pulse generator (PG) is correctly connected to the
option card or any wire is broken.

Check whether the PG is connected correctly. Or, tighten the related
terminal screws.

Check whether any contact part bites the wire sheath.

Replace the wire(s).
(3) The inverter was affected by
strong electrical noise.
Check whether 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.

Separate the control circuit wires from the main power wires as far
as possible.