On site Troubleshooting and Parameter Recovery Guide for Reliance Electric GV3000/SE Vector Inverter

When OCd decelerates, the overcurrent deceleration time is too short, and the regeneration energy is too large, which prolongs P.002/P.018; If it is FVC mode, it can check the fault avoidance of U.024 high bus

OF overclocking fault output frequency exceeds the limit of H.022; Or search for motor nameplate parameters (U.003/U.005) for excessive current during self-tuning; Reduce H.022 to P.004+15Hz

OL motor overload load is too heavy, torque increase is too high (H.003), or current limit is too low. Measure whether the actual current exceeds U.004/H.002; Reduce H.003 (≤ 5%); Increase P.005

Check all three-phase cables and terminals inside the motor junction box for cable phase failure or power module damage in OPL output phase loss motor

OSP overspeed (vector) actual speed exceeds 130% of P.004. Check the encoder PPR (U.001), motor pole number (U.002), and maximum speed P.004

The PUc power module ID connector is missing, and the flat cable between the regulator and the power module is loose. Re plug the connecting wire to ensure that the J7/J8 plugs are secure

PUn power module does not recognize that the adjustment board does not match the power module, or EEPROM data is lost, please contact the original factory for reconfiguration; P.099 automatic recognition can be adjusted when replacing power modules of the same series

SF self-tuning failed. Please refer to the detailed results in U.009 and compare them with the U.009 value (detailed below)

Measurement of three-phase input and bus voltage for internal capacitor or rectifier bridge faults in UbS bus charge asymmetric power module; Replace the power module

Chapter 3: Deep Diagnosis and Repair of Typical Faults

3.1 After powering on, the display 'SELF' persists and does not disappear

Phenomenon: After power on, the digital display shows "SELF" for more than 10 seconds, all LEDs are fully lit, and then repeatedly restarted.

Reason:

Communication failure between regulator board and power module (most common).

The+5V or ± 15V power supply provided by the power board is abnormal.

The firmware version is incompatible (such as 6.06 software paired with the old power module).

handle:

Turn off the power, open the control terminal cover, and check if the 30 pin ribbon cable between the bottom of the regulator board and the power board is oxidized, bent, or not locked.

Re plug and unplug the cable, and use a multimeter to measure that the test point TP1 (+5V) on the regulator board should be+5V ± 5% for TP3 (GND).

If the voltage is normal and still SELF, use CS3000 software or OIM (Remote Operator Interface) to download the firmware again. When there are no tools available, you can try to force a factory reset: set P.050 to ON (but P.048 will not reset and may need to be manually switched back).

If the above is invalid, the regulator board needs to be replaced.

3.2 During operation report "OCA" (accelerated overcurrent)

Phenomenon: OCA jumps at the moment of startup or during acceleration.

Reason and investigation:

The acceleration and deceleration time is too short: the acceleration time set for P.001 or P.017 is significantly lower than the actual load inertia required. Gradually increase the value (such as from 20 seconds to 40 seconds) for testing.

Excessive torque boost (V/Hz mode): H.003 defaults to 0.5%. If set to 5% or more, the no-load starting current may exceed 150%. Restore to 0.5% or 0.

U. 004 (rated current of motor) set lower than the actual motor nameplate: resulting in high current limit but excessive actual current. The motor nameplate should be checked, and U.004 must be ≥ motor FLA.

Motor wiring error: Triangle/star connection error caused phase current to double. Check the motor junction box.

Encoder direction error (FVC): If encoder A/B is connected in the opposite direction during self-tuning, it will cause a polarity error in the speed feedback, causing the speed regulator to output saturation current. Solution: Swap encoders A and B (or A and/A) for self-tuning again.

3.3 Self tuning failure (SF fault code analysis)

In vector adjustment mode, self-tuning (U.008=ON and then press START) must be performed to measure the motor excitation current (U.006) and encoder PPR (FVC). When self-tuning fails, U.009 will store the result value:

U. 009 Value Meaning: On site Countermeasures

0 successfully recorded data, restore U.008 to OFF

1. The user presses STOP to interrupt and re enable U.008, and then presses START again

2. Fault or emergency stop interrupt, clear the fault and retry

The motor or encoder direction is opposite, and the motor shaft should rotate counterclockwise (facing the shaft extension end). If the direction is correct and still reports 3, switch the encoder A/A NOT line

4. The PPR of the encoder is not within the allowed value (512/1024/2048/4096). Check the encoder model, manually enter the correct value in U.001, and self-tuning again

If the excitation current exceeds the range of 10-80%, it is possible that the motor has not disconnected from the load - the motor must be mechanically disconnected from the load (by removing the coupling) and retry. Simultaneously confirm that the settings for U.004 are correct