Fuji Electric FRENIC-Ace series, Руководство пользователя

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6.3 If an Alarm Code Appears on the LED Monitor
6-20
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0lu
Inverter overload
Phenomena Temperature inside inverter has risen abnormally.
Possible Causes Check and Measures
(1) The surrounding temperature
exceeded the inverter's mode
limit.
Measure the surrounding temperature.

Lower the temperature (e.g., ventilate the panel where the inverter
is mounted).
(2) Excessive torque boost
specified (F09*)
Check whether decreasing the torque boost (F09*) does not stall the
motor.

If no stall occurs, decrease the F09* data.
(3) The specified acceleration/
deceleration time was too short.
Recalculate the acceleration/deceleration torque and time needed for
the load, based on the moment of inertia of the load and the
acceleration/deceleration times.

Increase the acceleration/deceleration times (F07, F08, E10 to E15,
and H56).
(4) Overload. Measure the inverter output current.

Reduce the load (e.g. Use the overload early warning (E34) and
reduce the load before the overload protection is activated.). In
winter, the load tends to increase.

Decrease the Carrier frequency (function code F26).

Enable overload prevention control (H70).
(5) Ventilation paths are blocked. Check if there is sufficient clearance around the inverter.

Change the mounting place to ensure the clearance.
Check if the fin is not clogged.

Clean the fin.
(6) Cooling fan's airflow volume
decreased due to the service
life expired or failure.
Check the cumulative run time of the cooling fan. See Chapter 3 “3.4.5
Reading maintenance information.”

Replace the cooling fan.
Visually check that the cooling fan rotates normally.

Replace the cooling fan.
(7) The wires to the motor are too
long, causing a large leakage
current from them.
Measure the leakage current.

Insert an output circuit filter (OFL).
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0pl
Output phase-failure detection
Phenomena Output phase loss occurred.
Possible Causes Check and Measures
(1) Inverter output wires are
broken.
Measure the inverter output current.

Replace the output wires.
(2) The motor winding is broken. Measure the inverter output current.

Replace the motor.
(3) The terminal screws for inverter
output were not tight enough.
Check if any screws on the inverter output terminals have become
loose.

Tighten the terminal screws to the recommended torque.
(4) A single-phase motor has been
connected.

The inverter cannot be used. FRENIC-Ace has been designed for
driving 3-phase induction / permanent magnet synchronous motors.