LS Electric iV5 Drive Fault Codes:
| Fault Code and Meaning | Cause and Remedy |
|---|---|
| Over Current Over Current Protection | Cause: The inverter turns off its output when the output current of the inverter flows more than 200% of the inverter rated current. Remedy: Check for short circuits, excessive load, or motor insulation failure. |
| Ground Fault Ground Fault Protection | Cause: A ground fault occurred and the current exceeded the internal setting value. This can occur due to low ground fault resistance. Remedy: Check output cabling and motor insulation for ground faults. |
| Over Voltage Over voltage protection | Cause: DC voltage of the main circuit increased higher than the rated value (200V class: 400V DC, 400V class: 820 V DC). This often happens when the motor decelerates (regenerative energy) or due to a surge voltage in the power supply. Remedy: Check input power for surges; consider increasing deceleration time or using a braking resistor. |
| Low Voltage Low Voltage Protection | Cause: DC voltage dropped below the detection level (200V class: 180Vdc, 400V class: 360Vdc). Insufficient torque or motor overheating can occur if input voltage drops. Remedy: Check input power supply voltage and wiring connections. |
| Over Load Overload Protection | Cause: The output current flowed at 180% of the inverter rated current for more than the current limit time (S/W). Remedy: Reduce load; check motor capacity matches inverter capacity. |
| Inv OLT Inverter Overload | Cause: The rated current of the inverter flowed more than regulation level (150% for 1 minute; inversely proportional to time). Remedy: Check load rating and duty cycle. |
| InvOver Heat Heat Sink Over Heat | Cause: The heat sink overheated due to a damaged cooling fan or foreign substance in the cooling fan (detected by heat sink temperature). Remedy: Check cooling fan for damage or blockages; clean heat sink. |
| OHD Open Heat Sink Over Heat (OHD) | Cause: OHD is opened and the heat sink is overheated. (Note: Only applies to SV2800 ~ 3750iV5). Remedy: Check thermal sensor continuity and cooling system. |
| InvThem OP Inverter NTC Thermistor Open | Cause: The inverter NTC Thermistor is open. Remedy: Contact service/support; internal hardware check required. |
| MotOver Heat Motor overheat | Cause: Motor temperature exceeded 150°C. Output stopped to protect motor. Remedy: Check motor cooling, load factor, and operating environment. |
| MotThem Err Motor Thermistor Error | Cause: Error in the Thermistor that measures motor temperature (e.g., NTC open). Remedy: Check motor thermistor wiring and sensor health. |
| E-Thermal Electronic Thermal | Cause: Internal electronic thermal calculation determined motor overheating. Overload capacity: 150% for 1 min. Note: Inverter cannot protect multi-pole or multiple motors effectively with this function alone. Remedy: If driving multiple motors, consider installing external thermal relays for each motor. |
| External-B External fault B | Cause: User triggered the external fault signal to turn off output. Remedy: Check external input source/switch assigned to External Fault B. |
| Arm Short / Arm Short-DB IGBT Short | Cause: Inverter output stopped because IGBT Arm short or output short occurred. (Arm Short-DB applies to SV110~220iV5). Remedy: Check output wiring for shorts; internal IGBT may be damaged. |
| Fuse Open Fuse Open | Cause: Fuse opened to protect wiring from short currents (usually implies main circuit IGBT issue). Remedy: Do not replace fuse immediately; check main circuit IGBT and wiring for shorts. |
| Encoder Err Encoder Error | Cause: 1) Encoder signal fault occurred (Hardware). 2) Discord of detection time standard of motor error of PAR-14 (Software). Remedy: Check encoder wiring, power, and PAR-14 settings. |
| BX BX protection (Instant Cut Off) | Cause: Used for emergency stop. Output turns off instantly when BX terminal is ON. Returns to operation when BX is OFF. Remedy: Check status of the BX terminal input. Take caution when using this function. |
| Over Speed Motor overspeed | Cause: Motor is rotating over 120% of its rated speed. Remedy: Check load inertia, brake settings, and speed command parameters. |
| COM Error / CPU Error Communication Error | Cause: Inverter cannot communicate with the keypad. Remedy: Check keypad connection cable and seating. |
| HW- Diag H/W Error | Cause: CPU has a problem; inverter blocks IGBT gating signals. Remedy: Cycle power. If fault persists, contact service (CPU/Control board failure). |
| FAN Lock FAN Lock | Cause: The inverter detected a Fan Lock condition. (Only comes under SV2800~3750iV5). Remedy: Inspect cooling fans for debris or mechanical failure. |
| Enc Power Encoder PowerError | Cause: Error in Encoder power source. (Only comes under SV2800~3750iV5). Remedy: Check encoder power supply voltage and wiring. |
| Input PO Input Phase-open | Cause: Power from one phase among the 3-phase input is discontinued at normal load state. Remedy: Check input power lines, fuses, and circuit breakers. |
| Output PO Output Phase-open | Cause: Inverter detected no-output current (open phase on output). Remedy: Check motor wiring and motor windings for continuity. |
| FAN/MC PWR AC FAN and M/C Power Error | Cause: AC220V is not supplied to AC FAN and M/C. (Applicable to 30 ~ 160 kW). Remedy: Check auxiliary AC220V power supply to fans and magnetic contactors. |
| FAN PWR AC FAN Power Error | Cause: AC220V is not supplied to AC FAN and M/C. Remedy: Check auxiliary AC power supply. |