Fuji Electric FRENIC-Ace series - Page 471

6.3 If an Alarm Code Appears on the LED Monitor
6-17
TROUBLESHOOTING
Chap 6
[ 26 ]
0h1
Cooling fin overheat
Phenomena Temperature around heat sink 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) 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.
(3) Cooling fan's airflow volume
decreased due to the service
life expired or failure.
[Subcode:6]
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.
(4) Overload. Measure the inverter output current.
 Reduce the load. Reduce the load before reaching an overload
using cooling fin overheat forecast (E01-E05)/overload forecast
(E34).
 Decrease the motor sound (Carrier frequency (F26)).
 Enable overload prevention control (H70).
[ 27 ]
0h2
External alarm
Phenomena External alarm was inputted (THR).
(when the “Enable external alarm” signal THR has been assigned to any of digital input terminals)
Possible Causes Check and Measures
(1) An alarm function of external
equipment was activated.
Check the operation of external equipment.
 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 “external alarm” has been assigned (Any of E01 to
E05, E98, and E99 should be set to “9.”).
 Connect the external alarm signal wire correctly.
(3) Incorrect setting of function
code data.
Check whether an “external alarm” is assigned to a terminal not used
yet among E01 to E05, E98, E99.
 Correct the assignment.
Check whether the logic of [THR] set up at E01 to E05, E98, E99 agrees
with that (positive/negative) of external signals.
 Ensure the matching of the logic.
[ 28 ]
0h3
Inverter internal overheat
Phenomena Temperature inside the inverter has exceeded the allowable limit.
Possible Causes Check and Measures
(1) The surrounding temperature
exceeded the inverter's mode
limit.
[Subcode:0]
Measure the surrounding temperature.
 Lower the temperature around the inverter (e.g., ventilate the panel
where the inverter is mounted).