Fuji Electric FRENIC-AQUA series, User Manual

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9-8
[ 8 ] OH2 External alarm
Problem External alarm was inputted ( THR ).
(when the "Enable external alarm trip" THR has been assigned to any of digital input terminals)
Possible Causes What to Check and Suggested Measures
(1) An alarm function of external
equipment was activated.
Check the operation of external equipment.
Î Remove the cause of the alarm that occurred.
(2) Wrong connection or poor
contact in external alarm signal
wiring.
Check if the external alarm signal wiring is correctly connected to the
terminal to which the "Enable external alarm trip" terminal command
THR has been assigned (Any of E01 through E07, E98, and E99 should
be set to "9.").
Î Connect the external alarm signal wire correctly.
Check whether the "Enable external alarm trip" terminal command
THR has been assigned to an unavailable terminal (with E01 through
E07, E98, or E99).
Î Correct the assignment.
(3) Incorrect setting of function
code data.
Check whether the normal/negative logic of the external signal matches
that of the THR command specified by any of E01 through E07, E98,
and E99.
Î Ensure the matching of the normal/negative logic.
[ 9 ] OH3 Inverter internal overheat
Problem Temperature inside the inverter has exceeded the allowable limit.
Possible Causes What to Check and Suggested Measures
(1) The ambient temperature
exceeded the inverter's
specification limit.
Measure the ambient temperature.
Î
Lower the temperature around the inverter (e.g., ventilate the panel
where the inverter is mounted).
(2) The airflow generated by the
internal fan has dropped because
the fan lifetime has been reached
or because a fault has occurred.
Visually check whether the internal fan is functioning normally.
Î Replace the internal fan.
(3) The power is turned ON too
often
Reduce the number of times the power is turned ON/OFF (guide:
1/hour or less)
[ 10 ] OH4 Motor protection (PTC thermistor)
Problem Temperature of the motor has risen abnormally.
Possible Causes What to Check and Suggested Measures
(1) The temperature around the
motor exceeded the motor's
specification range.
Measure the temperature around the motor.
Î Lower the temperature.
(2) Cooling system for the motor
defective.
Check if the cooling system of the motor is operating normally.
Î
Repair or replace the cooling system of the motor.
(3) Overload. Measure the output current.
Î Reduce the load (e.g. Use the heat sink overheat early warning
(E01 through E09) or the overload early warning (E34) and reduce
the load before the overload protection is activated.). (In winter,
the load tends to increase.)
Î Lower the temperature around the motor.