~OPERATIONAL PROCEDURES,MAINTENANCE,
AND TROUBLE SHOTTING~
- 73 -
S T O P
R E S E T
(2) Fault, maintenance and trouble shooting
A. Descriptions
The inverter equips with complete protective functions. If protective
function is activated, power transistors will be turned off and display
will show what fault is. After proper trouble shooting, to short RST
and COM, or press in keypad, inverter will
operate.
B. Protections and trouble shooting:
Protections
and display
Functions
Trouble Shooting
Over current
for loss speed
(acceleration)
During acceleration, if output current
exceeds the stall prevention limit during
acceleration (F_070), acceleration will be
terminated. Until output current less than
the setting value, acceleration will be
continuous.
Increase acceleration time
or use the higher capacity
inverter.
Over voltage
for loss speed
(deceleration)
During deceleration, too high regenerative
voltage will cause termination of
deceleration. Until the regenerative
voltage is not too high, deceleration will
be continuous.
Increase deceleration time
or use dynamic brake unit.
Over current
O.C.
Output current exceeds 220% of rated
current of inverter. Inverter is shutdown.
Output terminals(U.V.W.)
is short-circuited,
overload,acceleration time
too small, start at free
running, or mismatched
characteristics of motor.
Over voltage
O.E.
Due to the higher regenerative voltage or
voltage of power source, the main circuit
DC voltage exceeded the over voltage
detection level .
200V series : Approx. DC410V
400V series : Approx. DC820V
Increase deceleration time,
or use high braking torque
and dynamic brake unit.
Decrease input voltage.
Over load
O.L.
Motor overload protection operates by
build-in electronic thermal overload relay. Decrease motor load.
Over load
OL1
RM5G series 150% inverter rated output
current for one minute.
RM5P series 120% inverter rated output
current for one minute.
Use high-capacity inverter
Over heat
O.H.
When the temperature of heat sink is too
high or external thermal relay to be
activated, inverter is shutdown
Improve the cooling system
or clear heat sink.
Under
voltage L.E.
the main circuit DC voltage is decreased
33% of rated value, inverter will display
“ LE ”.
Increase the capacity of
power source for avoiding
line voltage of power
source to be decreased
significantly.
