Amtech Axpert-Eazy Series Instruction Manual page 231

No. Fault Name
15 EEPROM Fault
16 Ground Fault
17 Communication Loss
18 Output Current
Unbalance
Axpert-Eazy AC Variable Frequency Drive
Causes & Countermeasures
stop with the help of Mode-C parameters.
3. There may be a problem in PCA-2014A.
Remove the control board PCA-2014A.
1. Data received from the EEPROM is incorrect or out of range.
On fault reset, default values will be stored in the EEPROM.
Ensure proper earth connection to the unit and inside the unit.
2. If again fault occurs after power recycling, replace PCA-2014A.
1. Ground fault may have occurred in the output line or motor.
Check that any output is not shorted with the ground. Partially
damaged output cables can also lead to this condition.
2. One or more current sensor may have problem.
Remove the current sensor feedback and check.
3. If still fault persists, replace PCA-2014A; otherwise replace the
problematic current sensor.
1. Check the communication cable between master (LCD Display
unit) and slave (Main control unit).
2. Disable the fault using C405. This will allow the inverter to run in
case of communication loss between the PCA-2014A DSP control
board and PCA-2012 LCD display board.
3. There may be problem in display board PCA-2012.
Replace the display board PCA-2012 and check again.
4. There may be problem in control board PCA-2014A. If +5 V supply
or +3.3 V supply is not coming then also this fault will come.
Check the power supply unit and if found problem replace it or replace
the DSP control board PCA-2014A and check again.
1. Check the setting of B314. Correct the setting if it is too low.
2. Go through the below steps and if it does not help, disable it by
setting 0% to B314.
If fault occurs during acceleration when the motor is connected,
1. Make sure that the parameters are set properly. Abnormal setting
of V/F, Torque Boost, Acceleration time and Speed search function
related parameters and current limit may result in output current
unbalance.
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 may have occurred at output. Reduce
the load fluctuation 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 motor connection with inverter and at motor terminal. If
any connection is open or loose, correct it.
If fault occurs during deceleration,
1. Increase the deceleration time (A202 / A204).
2. Abnormal setting of DC braking parameters can result in unbalance
current fault during deceleration. Reduce the dc braking start
frequency (A306) and dc braking time (A308) settings if used.
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