Fuji Electric FRENIC MEGA G2 Series - Page 636

6.3 If an Alarm Code Appears on the LED Monitor
6-22
[ 30 ] 0H1 Cooling fin overheat
Phenomenon: Temperature around heat sink has risen abnormally.
Possible cause
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 fins.
(3) Cooling fan's airflow volume
decreased due to the service
life expired or failure.
Check the cumulative run time of the cooling fan. (See Chapter 3 “3.4.5
Reading maintenance information.”)
➔ Replace the cooling fan.
Measure the inverter output current.
➔ 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).。
[ 31 ] 0H2 External alarm
Phenomenon: External alarm was inputted THR.
(when the “Enable external alarm” signal THR has been assigned to any of digital input terminals)
Possible cause
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
E09, 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 E09, E98, E99.
➔ Correct the assignment.
Check whether the logic of THR set up at E01 to E09, E98, E99 agrees
with that (positive/negative) of external signals.
➔ Set the logic correctly.
[ 32 ] 0H3 Inverter internal overheat
Phenomenon: Temperature inside the inverter has exceeded the allowable limit.
Possible cause
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).