Maeda MK0003, Service Manual, Page: 312 / 348

5-18
Name Content
Alarm
code
Check content and
countermeasures
Reference
Modbus
communication
fault Trips if timeout occurs when the setting for
the communication error selection is trip
(C076 = 00). E41.  Is the communication speed
correct?
• Check the settings.
Is the wiring distance appropriate?
• Check the communication
cables.
Are there any breakages?
• Check the wirings.
Driveprogramming
fault • Program fault (E43.

– E45.

)
• User trip (E50.

– E59.

)
E43.

–
E59.

Refer to “DriveProgramming
Users Manual (SBCE-369)” for
details.
Optional unit fault Error reported from optional units. E60.

–
E68. 
Refer to the manuals of the
optional units for details.
Optional unit
timeout Trips when timeouts occur in the
communication between the inverter and
the optional units. E69.  Optional units are disconnected.
• Check if the fixing screws are
loose, and that the optional
units are properly attached
with the inverter.
Optional units are damaged.
• If the optional units are
properly attached, they may be
damaged.
Encoder breakage Trips if the status, where the motor rotation
detected by the encoder is below the start
frequency (b082), continues consecutively
for more than the encoder breakage
detection time (P077
≠ 0), when the output
frequency is above the creep speed setting
(P015).
E80.

Breakage or bad connection of the
encoder wirings.
• Check the encoder wirings.
The actual motor rotation is below
the start frequency (b082) for
more than the breakage detection
time (P077).
• Parameter adjustment
Make P077 longer, and P015
higher.
This also occurs when the motor
rotation is below the start
frequency during the simple
positioning.
• Parameter adjustment
Make P077 longer, and P015
higher.
Overspeed Trips when the motor rotation is over
maximum frequency × overspeed fault
detection level (P026
≠ 0).
E81.

Determined in the speed detection
of the encoder.
Breakage or bad connection of the
encoder wirings
• Check the encoder wirings.
Inconsistency in the encoder
pulse value.
• Check the encoder pulse
value. P011
The actual motor rotation is over
the fault detection level.
• Adjust the overspeed fault
detection level P026.
Positioning control
range trip Trips when the current position exceeds the
specified position range (P072, P073) in the
simple positioning control. E83.

Check the current position.
• Check the parameter (P072,
P073).
• Check the origin point.