6.3 If an Alarm Code Appears on the LED Monitor
6-9
[ 4 ] dbH Braking resistor overheat
Phenomenon: The electronic thermal protection for the braking resistor has been activated.
(1) Braking load is too heavy.
[Subcode: 0]
Reconsider the relationship between the braking load estimated and the
real load.
➔ Lower the real braking load.
➔ Review the selection of the braking resistor and increase the
braking capability.
Modification of related function codes data (F50, F51, and F52) may
be also required.
(2) Specified deceleration time is
too short.
[Subcode: 0]
Recalculate the deceleration torque and time needed for the load
currently applied, based on a moment of inertia for the load and the
deceleration time.
➔ Increase the deceleration time (function codes F08, E11, E13, E15,
and H56).
➔ Review the selection of the braking resistor and increase the
braking capability.
Modification of related function codes data (F50, F51, and F52) may
be also required.
(3) Incorrect setting of function
code data F50, F51, and F52.
[Subcode: 0]
Recheck the modes of the braking resistor.
If using a braking resistor (option) on a model (FRN0046G2S-2G/
FRN0023G2■-4G or below) with built-in braking resistor, check whether
the braking resistor electronic thermal overload relay setting been
changed.
➔ Review data of function codes F50, F51, and F52, then modify them
if required.
The inverter issues an overheat alarm of the braking resistor by monitoring the magnitude of the braking
load, not by measuring its surface temperature.
When the braking resistor is used so frequently as to exceed the settings made by function codes F50,
F51, and F52, therefore, the inverter issues an overheat alarm even if the surface temperature of the
braking resistor does not rise. To obtain full performance of the braking resistor, configure function codes
F50, F51, and F52 while actually measuring the surface temperature of the braking resistor.
[ 5 ] ECf EN circuit failure
Phenomenon: Enable circuit state was diagnosed and a circuit failure was detected.
(1) Control terminal block board
contact defect
Confirm that the control terminal block board has been firmly mounted in
the inverter.
➔ Alarm is released by turning on again.
(2) Enable circuit logic failure
• Confirm that outputs from safety switch etc. are inputted by the same
logic (High/High or Low/Low) with terminals [EN1] and [EN2].
• Ensure that the 2 poles for the SW7 switch on the control board are
both ON/ON or OFF/OFF.
➔ The alarm is cleared by pressing the key, or by turning the
power OFF and ON again.
(3) A failure (single failure) of
enable circuit (safety stop
circuit) was detected.
If the circuit failure is not removable by the procedures above, the
inverter is out of order.
➔ Contact your Fuji Electric representative.
To Next Page
Loading...
