Oh2 External Alarm Input; Ptc Thermistor For Motor Protection - GE Fuji Electric AF-300 Mini Startup Manual
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Also See for Fuji Electric AF-300 Mini:
- Instructions manual (78 pages) ,
- Instructions manual (44 pages)
Table of Contents
Possible Causes
(4)
Excessive load.
[7] OH2 External alarm input
Problem
External alarm was signalled (THR).
Possible Causes
(1)
An alarm function of the
external equipment was
activated.
(2)
Connection has been
performed incorrectly.
(3)
Incorrect settings.
[8] OH4 PTC thermistor for motor protection
Problem
Temperature of the motor rose abnormally.
Possible Causes
(1)
Temperature around the
motor exceeded that of
motor specifications.
(2)
Cooling system for the
motor malfunctioned.
(3)
Load was too heavy.
(4)
The set activation
level (H27) of the PTC
thermistor for motor
overheat protection was
inadequate.
(5)
A PTC thermistor and
pull-up resistor were
connected incorrectly
or their resistance was
inadequate.
What to Check and Suggested Measures
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).
What to Check and Suggested Measures
CHECK
Inspect external equipment operation.
SUGGESTED ACTIONS
– Remove the cause of the alarm.
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.
CHECK
Check if the "Alarm from external equipment" has been assigned to an unassigned terminal.
SUGGESTED ACTIONS
– Correct the assignment.
What to Check and Suggested Measures
CHECK
Measure the temperature around the motor.
SUGGESTED ACTIONS
– Decrease the temperature.
– Reduce the load.
CHECK
Check if the cooling system is operating normally.
SUGGESTED ACTIONS
– Repair or replace the cooling system.
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).
CHECK
Check the thermistor specifications and recalculate the detection voltage.
SUGGESTED ACTIONS
– Reconsider the data of function code H27.
CHECK
Check the connections and resistance.
SUGGESTED ACTIONS
– Correct the connections and resistance.
6-11
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