Axpert-Eazy AC Variable Frequency Drive
A.13
13
A
No.
Fault Name Causes & Countermeasures
1. Make sure that the parameters are set properly. Abnormal setting
of V/F, Torque Boost, Acceleration time, Speed search function
related parameters and current limit may result in over current or
damage to the power devices.
2. Increase the acceleration time (A201 / A203).
3. Reduce torque boost settings (A501 / A502)
If fault occurs during normal run with load condition,
1. A sudden change in the load or short circuit may have occurred at
output. Reduce the load fluctuation and/ or any short circuit
condition at the output.
2. If the current fluctuation is observed, adjust the DTC gain B111
such that the fluctuation disappears.
3. One or more current sensor may be partially damaged.
Measure the voltage at pin-3, 7 and 11 of connector J12 with
respect to J8:4 in PCA-2014A. When the measured output current
is balance, the voltage level at these pins should be approx. equal.
If any output observed uncommon, replace the respective current
sensor and check again.
4. Check the value of snubber capacitors mounted on the IGBT and
replace if found abnormal.
5. IGBT driver may have problem.
Replace the driver board and check.
If fault occurs during deceleration,
1. Increase the deceleration time (A202 / A204).
2. Abnormal setting of DC braking parameters can result in over
current fault during deceleration. Reduce the dc braking start
frequency (A306) and dc braking time (A308) settings if used.
2
1. The AC Drive may have overloaded.
Ensure that motor current data are properly set in B103.
Reduce the load or increase the motor and AC DRIVE capacity
2. If this occurs at low speed, reduce the torque boost settings (A501 /
A502) or DC braking settings (A307 / A308)
3
Fault
1. The motor current data are set incorrectly. Set correct motor
current data in B103.
2. The adjustable over current settings are too low.
Increase the adjustable over current level (B302).
3. The output current is too high.
Reduce the motor load.
4. Disable the feature by setting 300% in B302.
4
1. Under Current Limit B304 is set too low.
2. Disable the feature by setting 0% in B304.
5
Fail Fault
1. Loose connection of hall current sensor cable connected at J12 of
PCA-2014A. Switch off the unit and remove the cable. Check for
proper crimping of cable on both sides. If found abnormal, replace
the cable and check again.
2. One or more current sensor has failed.
Remove connector J12 and reset the fault. If the fault can be reset,
find out which current sensor has failed.
3. If after removing connector J12, the problem persists, replace
PCA−2014A.
6
1. The power supply voltage may have risen above 785 VDC for 400
V series, 965 VDC for 500 V series and 1160 VDC for 600 V series.
Reduce the voltage to within the specified range.
2. The speed may be fluctuating.
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