Lennox Mitsubishi E800 Series Variable Frequency Drive (VFD) Replacement Kit Kits are used to replace the variable frequency drive (VFD) in LG/LC, SG/SC, KG/KC/KH, EL series units. This kit contains an E800 series drive. When replacing a D700 drive with the E800 drive provided in this kit, use kit harnesses as shown in the instructions. Pre-programmed VFD (4) Wiring Harnesses