YASKAWA CIMR-ACA4011 Instruction Manual page 328

Display Meaning
SRC
Power Phase Rotation Variation
(flashing)
After control power supply is on, the
Power
direction of the phase rotation
Phase
changes.
Err
Control Circuit Overvoltage
OV
The control circuit voltage exceeded
(flashing)
the overvoltage detection level.
PS Over-
200 V class: Approx. 410 V
volt
400 V class: Approx. 870 V
OH
(flashing)
Cooling Fin Overheat
Heat-
The temperature of the MxC's cooling
sink
fins exceeded the setting in L8-02.
Over-
temp
MxC Overheating Pre-alarm
OH2
An OH2 alarm signal (MxC overheat-
(flashing)
ing alarm signal) was input from a
Over
multi-function input terminal (S3 to
Heat 2
S12).
OH3
Motor Overheat
(flashing)
The MxC continues or stops the oper-
Motor
ation according to the setting of L1-
Over-
03.
heat 1
DOH
Internal Resistance Overheat
)
(flashing
The temperature of the built-in resistor
Dump-
exceeded the set value.
ing OH
OL3
Overtorque 1
(flashing)
There has been a current greater than
Over-
the setting in L6-02 for longer than the
torque
setting in L6-03.
Det 1
Table 7.2 Alarm Displays and Processing (Continued)
Probable causes
• The phase sequence changed dur-
ing run.
• An open-phase occurred with the
input power supply.
• A momentary power loss occurred.
• The wiring terminals for the input
power supply are loose.
• The voltage fluctuations in the
input power supply are too large.
• The voltage balance between phase
is bad.
The power supply voltage is too high.
The ambient temperature is too high.
There is a heat source nearby.
The MxC cooling fan has stopped.
The motor has overheated.
• The power capacity is too small.
• The power distortion is too large.
An open phase occurred in the input
power supply.
Protective and Diagnostic Functions
Corrective Actions
Clear the fault after correcting the
problem or removing its cause.
Decrease the voltage to be within spec-
ifications.
Install a cooling unit.
Remove the heat source
Replace the cooling fan. Contact your
Yaskawa representative.
Clear the multi-function input termi-
-
nal's overheating alarm input.
Check the size of the load and the
length of the acceleration, decelera-
tion, and cycle times.
Check the V/f characteristics.
Check the setting in E2-01 (Motor
Rated Current).
• Increase the power capacity.
• Decrease the impedance of the input
power wiring.
For details, refer to MxC Application
Precautions in Chapter 10.
• Check and correct the open-phase
condition or the imbalance of the
input power.
• If DOH flashes when the MxC is not
running operating, Set L8-10 (Heat-
sink Cooling Fan Operation Selec-
tion) to 1. So that the cooling fan
will always turn on when the power
is turned on.
Clear the fault after correcting the
problem or removing its cause.
• Make sure that the settings in L6-02
and L6-03 are appropriate.
-
• Check the mechanical system and
correct the cause of the overtorque.
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