Yaskawa Matrix Converter - Manual (Page 327)

7
-6
SOH
Dischrg
Res. Flt
Resistor Overheat
The temperature of the resistor
exceeded tolerance.
• The input power supply voltage is
too high.
• The power capacity is too small.
• The power distortion is too large.
• Decrease the voltage to be
within specifications.
• Increase the power capacity.
• Decrease the impedance of the
input power wiring.
For details, refer to MxC Applica-
tion Precautions in Chapter 10.
The load conditions were too heavy
during repetitive operation.
• Decrease the load.
• Lengthen the acceleration and
deceleration times.
An open phase occurred in the input
power supply.
Check and correct the open-phase
condition or the imbalance of the
input power.
Clear the fault after correcting the
problem or removing its cause.
Current overflow during a current
detection speed search. Reduce the Current Suppression
Gain During Search (b3-04).
DOH
Dumping
OH
Internal Resistance Overheat
The temperature of the built-in resistor
exceeded the set value.
• The power capacity is too small.
• The power distortion is too large.
• Increase the power capacity.
• Decrease the impedance of the
input power wiring.
For details, refer to MxC Applica-
tion Precautions in Chapter 10.
An open phase occurred in the input
power supply.
Check and correct the open-phase
condition or the imbalance of the
input power.
Clear the fault after correcting the
problem or removing its cause.
An operation command was input
while this warning was displayed.
Set L8-10 (Heatsink Cooling Fan
Operation Selection) to 1 so that
the cooling fan will always turn on
when the power is turned on.
After changing the setting, wait
for a while and then clear the fault.
OL1
Motor
Overloaded
Motor Overload
The motor overload protection func-
tion has operated based on the internal
electronic thermal value.
The load is too heavy. The accelera-
tion time, deceleration time, and cycle
time are too short. Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
The V/f characteristics voltage is too
high.
Check the V/f characteristics.
The Motor Rated Current (E2-01) is
incorrect. Check the Motor Rated Current
(E2-01).
OL2
MxC
Overloaded
MxC Overload
The MxC overload protection function
has operated based on the internal
electronic thermal value.
The load is too heavy. The accelera-
tion time, deceleration time and cycle
time are too short. Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
The V/f characteristics voltage is too
high.
Check the V/f characteristics.
The MxC capacity is too low.
Replace the MxC with one that
has a larger capacity.
Table 7.1 Fault Displays and Processing (Continued)
Display Meaning Probable Causes Corrective Actions