Error Detection Function - Mitsubishi Electric UM 5t Instruction Manual

If an error is detected, the 7-segment LED indicator will flash the error number, and the hoist will
be stopped. In this case, release the pushbutton switch, and then press it again, or stop supplying
the electric power, eliminate the cause of the error, and then restart operation.
List of lifting/lowering errors
Error Description of error
The AC power is turned off.
Power failure
The voltage of the PN line is
Power supply 460 V or less.
voltage too low
Both the lifting and lowering
commands are input at the
Defective
same time.
pushbutton
The pushbutton signal input
circuit is defective.
During lifting/lowering
operation, the 2-phase signal
Starting error sent from the rotation sensor
cannot be received for 0.5
sec or more.
The voltage of the PN line is
Regenerative 760 V or more.
voltage too high
During lifting operation or
Lowered during
stoppage of operation, the
lifting operation
hook is lowered.
Overwork The "Fout" signal is output.
Overcurrent (Overcurrent or overheat)
Control power
supply error
(Note 1) One of 2 signals is missing.
Defective rotation
sensor
The speed is higher than the
Over-speed
maximum speed 110%.
(Note 1) Counter overflow
Limit position
overrun
Overload The applied load is more
(Note 3) than the judgment value.
Note 1: Set the electronic operation limit position again.
Note 2: If the hoist is stopped due to overheat, restarting the hoist will not possible until the power module is cooled enough.
Note 3: This error will not be recorded in the error history.
Note 4: This error may occur if the overload stoppage function is not used or if an extremely large load is applied, e.g. earth lifting
is performed.

Error Detection Function

Measures
Immediate stoppage
Error indication
Immediate stoppage
Error indication
Deceleration and
stoppage
Error indication
Deceleration and
stoppage
Error indication
Immediate stoppage
Error indication
Immediate stoppage
Error indication
Immediate stoppage
Error indication
Deceleration and
stoppage
Error indication
Immediate stoppage
Error indication
Deceleration and
stoppage
Error indication
Deceleration and
stoppage
－22－
Cause Restarting
Power failure
Imperfect contact of
trolley
Power supply capacity
shortage
Imperfect contact caused
in trolley line
Wiring error
Defective CPU board
Overloaded during lifting
operation (Note 4)
Defective hoisting brake
Defective inverter
Overloaded during
lowering operation
(Defective regenerative
circuit)
Defective hoisting brake
Defective inverter
Overwork
Overload (Note 4)
Defective IPM
Disconnection
Defective rotation sensor
Motor line disconnection
Defective inverter
Noise
Defective rotation sensor
Defective CPU board
Overload
Display
Ｅｒ０１
Possible
Ｅｒ０２
Possible
Ｅｒ１１
Possible
Ｅｒ１２
Possible
Ｅｒ１３
Possible
Ｅｒ１４
Possible
Ｅｒ１６
Possible
(Note 2)
Ｅｒ２１
Inhibited
Ｅｒ２２
Inhibited
Ｅｒ２３
Inhibited
oL
Possible