Close-up of a Class A GFCI outlet with test and reset buttons
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VFD Tripping GFCI Breaker: Lenze Drive Solutions & Fixes

Estimated reading time: 12 minutes Have you ever dealt with your VFD tripping a GFCI breaker unexpectedly? If so, you’re not alone. Variable frequency drives (VFDs) often trip GFCI devices, especially in wet areas or where codes mandate…
Smoke rising from a failed VFD with burn marks on internal components
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VFD Hardware Failure: Diagnosis and Replacement Guide

Estimated reading time: 9 minutes When a variable frequency drive (VFD) suffers a catastrophic hardware failure, it usually gives unmistakable warning signs. The user might hear a loud pop or bang. They might also see smoke or scorch marks.…
VFD screen indicating a Ground Fault alarm
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VFD Ground Fault & Short-Circuit Trips: Causes & Solutions

Estimated reading time: 11 minutes Ground fault and short-circuit trips in VFDs are common but often confusing events for drive users. In a VFD, these faults appear suddenly and can stop the motor immediately. This often leaves operators…
Technician verifying VFD parameter settings for motor current and overload
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VFD Overcurrent Fault & Motor Overload – Causes & Fixes

Estimated reading time: 19 minutes Variable Frequency Drives (VFDs) are essential for controlling motor speed and protecting equipment in industrial applications. However, VFD overcurrent faults and motor overload trips are common issues…
Simplified DC-bus diagram showing rectifier, capacitors, and inverter stages of a VFD
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VFD Overvoltage Faults During Deceleration: Causes & Fixes

Estimated reading time: 13 minutes Variable Frequency Drives (VFDs) are essential for controlling motor speed in industrial and commercial applications. However, VFD overvoltage faults are a common issue that often occurs when a motor is…
“Close-up of a large industrial cooling fan—proper airflow prevents VFD overheating”
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VFD Overheating & Cooling System Failures: Causes and Fixes

Estimated reading time: 13 minutes Variable Frequency Drives (VFDs) are vital for controlling motor speed and efficiency in industrial applications. However, VFD overheating is a common problem that can trigger fault alarms and even lead…
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Invertek OptiDrive E3 Training Lesson 4: Basic Start Stop Switch Control Wiring & Programming – VFDs

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Invertek Optidrive E3 Training Lesson 3: Basic Speed Potentiometer Wiring & Setup – VFDs

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Invertek OptiDrive E3 Training Lesson 2: Basic Parameter Programming & Startup – VFDs

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Invertek OptiDrive E3 Training Lesson 1: Basic Input Voltage & Motor Wiring – VFDs

Download: SJ-P1 CAD Drawings

Thank you for choosing Precision Electric: Online as your technical documentation resource. You can begin your download by clicking the link below... Download: CAD Drawing 1 Download: CAD Drawing 2 Download: CAD Drawing 3 Download: CAD Drawing…

Sullair Drive Repair

Sullair drive repair has over the past decade become a cost-efficient way to reduce drive replacement costs while extending the overall lifetime of Sullair drive products. Today manufacturers around the globe within a wide range of industries…