GE Fuji Electric MICRO-SAVER AF-300, Руководство для стартапов

Страница: 89 / 127

6-10 6-11
Possible Causes What to Check and Suggested Measures
(4) Excessive load. CHECK
Measure the output current.
SUGGESTED ACTIONS
– Reduce the load (e.g. lighten the load before the overload protection occurs using the overload early
warning (E34)).
– Lower the carrier frequency (F26).
– Enable the overload protection control (H70).
[7] OH2 External alarm input
Problem External alarm was signalled (THR).
Possible Causes What to Check and Suggested Measures
(1) An alarm function of the
external equipment was
activated.
CHECK
Inspect external equipment operation.
SUGGESTED ACTIONS
– Remove the cause of the alarm.
(2) Connection has been
performed incorrectly.
CHECK
Check if the wire for the external alarm signal is correctly connected to the terminal to which the “Alarm
from external equipment” has been assigned.
SUGGESTED ACTIONS
– Connect the wire for the alarm signal correctly.
(3) Incorrect settings. CHECK
Check if the “Alarm from external equipment” has been assigned to an unassigned terminal.
SUGGESTED ACTIONS
– Correct the assignment.
[8] OH4 PTC thermistor for motor protection
Problem Temperature of the motor rose abnormally.
Possible Causes What to Check and Suggested Measures
(1) Temperature around the
motor exceeded that of
motor specifications.
CHECK
Measure the temperature around the motor.
SUGGESTED ACTIONS
– Decrease the temperature.
– Reduce the load.
(2) Cooling system for the
motor malfunctioned.
CHECK
Check if the cooling system is operating normally.
SUGGESTED ACTIONS
– Repair or replace the cooling system.
(3) Load was too heavy. CHECK
Measure the output current.
SUGGESTED ACTIONS
– Reduce the load (e.g., lighten the load before overload occurs using the overload early warning (E34)
function).
– Lower the temperature around the motor.
– Raise the carrier frequency (F26).
(4) The set activation
level (H27) of the PTC
thermistor for motor
overheat protection was
inadequate.
CHECK
Check the thermistor specifications and recalculate the detection voltage.
SUGGESTED ACTIONS
– Reconsider the data of function code H27.
(5) A PTC thermistor and
pull-up resistor were
connected incorrectly
or their resistance was
inadequate.
CHECK
Check the connections and resistance.
SUGGESTED ACTIONS
– Correct the connections and resistance.
StockCheck.com