EM-0146-8
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62
Table 7.2b Measures Against Alarms
Alarm
Name
Description
Cause
Remedy
E.C
Γ
E
Operation
Panel Power
Short Circuit
RS-485
Terminal Power
Short Circuit
Short circuit of the
operation panel power (PU
connector).
Short circuit of the RS-485
terminal power.
Short circuit of the
power cable of each
power supply.
Check the short-circuited part.
Replace the operation panel.
E.USb
USB
Communication
Error
Interruption of USB
communication.
Contact failure.
Check the cable.
E.OP3
Hydraulic
Control Board
Error
Pressure sensor output
error.
EEPROM error.
Disconnection of the
pressure sensor.
EEPROM read error.
Check the wiring.
Replace the wiring.
Replace the pressure sensor.
E. 3
Hydraulic
Control Board
Communication
Error
Interruption of
communication between
the hydraulic control board
and the driver.
Contact failure of the
connector.
Board failure.
Replace the AMSE controller.
E.Ov3
Regenerative
overvoltage
Regeneration during
deceleration/stop.
Overvoltage shutdown.
Rapid deceleration.
Increase the deceleration time.
Reduce the braking frequency.
Use a brake unit/power regenerative
converter, if required.
E. bE
Brake
Transistor Error
Detection
Damage to the brake
transistor or brake circuit
failure.
A large volume of
released pressure.
High braking
frequency (the cycle
time must be set with
sufficient margin).
The replacement of the AMSE
controller is required.
E.Uu
Γ
Undervoltage
The primary power voltage
applied to “R/L1,” “S/L2,”
and “T/L3” of the main
circuit terminal block is 300
V or less.
The short bar between
“P/+” and “P1” of the main
circuit terminal block or DC
reactor is connected.
Low power voltage.
Any factor that
reduces the main
power voltage and
causes the error
(startup of a large-size
motor, etc.).
Check the power facilities.
If a DC reactor is in use, check the
wiring.
E.IPF
Instantaneous
Power Failure
Power failure lasting more
than 15 ms.
*1: This error is not output
in the case of a power
failure of more than 100
ms.
*2: The operation continues
in the event of an
instantaneous power
failure of 15 ms or less.
Interruption of power
supply for more than
15 ms but less than
100 ms.
Remove the cause of instantaneous
power failure.
Prepare a backup power supply for
instantaneous power failure.
E.
Γ
H
Γ
AMSE
Controller
Overload
Shutdown
When the rated output
current is exceeded and if
overcurrent shutdown does
not occur, the electronic
thermal with inverse time
characteristics is activated
for output transistor
protection.
The motor’s rated
load factor has been
exceeded.
Reduce the load.
- Reduce the pressure setting.
- Reduce the cycle load by operating
the system at intervals.
E.
Γ
H
П
Motor Overload
Shutdown
The electronic thermal in
the AMSE controller has
detected a motor overheat
caused by overload or
reduced cooling capability
during constant speed
operation.
High overload factor
of the motor.
The set value of the
setting parameter “71:
Applicable Motor” is
improper.
Modify the motor environment
(ambient temperature).
Check that the motor fan works
normally.
