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6-15
Ch
ap. 6
TROUBL
ESHO
O
TING
Possible Causes
What to Check and Suggested Measures
(3) Cooling fan's airflow volume
decreased due to the service life
expired or failure.
Check the cumulative run time of the cooling fan. Refer to Chapter 3, Section 3.4.6
"Reading maintenance information – Menu #5 "Maintenance Information"."
Î
Replace the cooling fan.
Visually check whether the cooling fan rotates normally.
Î
Replace the cooling fan.
Inverters of 60 HP or above for three-phase 230 V series and those of 125 HP or above for
three-phase 460 V series are equipped with not only a cooling fan for heat sink but also an
internal air circulation fan. Check the following.
Î
Check the connection of the fan power switching connectors "CN R" and
"CN W."
Î
Correct the connection. (Refer to "
h
Switching connectors" in Chapter 2, Section
2.3.4 "Wiring of main circuit terminals and grounding terminals".
(4) Overload.
Measure the output current.
Î
Reduce the load (e.g. Use the heat sink overheat early warning (E01 through E07) or
the overload early warning (E34) and reduce the load before the overload protection
is activated.).
Î
Decrease the motor sound (carrier frequency) (F26).
Î
Enable the overload prevention control (H70).
(5) Running on single-phase power
Î
Refer to Section 6.7 "If the Inverter is Running on Single-Phase Power, [ 1 ] and [ 6 ].
[ 8 ]
0h2
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.
(3) Incorrect setting of function
code data.
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.
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 ]
0h3
Inverter internal overheat
Problem Temperature inside the inverter has exceeded the allowable limit.
Possible Causes
What to Check and Suggested Measures
(1) The
surrounding
temperature
exceeded the inverter's
specification limit.
Measure the surrounding temperature.
Î
Lower the temperature around the inverter (e.g., ventilate the panel where the
inverter is mounted).
(2) Running on single-phase power
Î
Refer to Section 6.7 "If the Inverter is Running on Single-Phase Power," [ 6 ].
Содержание FRENIC-MEGA
Страница 36: ...2 6 Unit inch mm Refer to Section 2 3 3 9...
Страница 208: ...5 89 Examples of Sequence Circuits 1 Standard sequence 2 Sequence with an emergency switching function...
Страница 356: ...MEMO...
Страница 358: ...Fuji Electric Co Ltd Fuji Electric Corp of America http www fujielectric com fecoa 2011 04 D11 D10...