Short Cycling: Variable Frequency Drive
$500 for replacement VFD
The short cycling was probably caused by improper loading of the VFD so it could not reach a steady rate of usage. These units are designed to provide efficiency benefits to the equipment they are connected to. When they don’t function properly, efficiencies may be assumed that are not materializing.
Short cycling is difficult to diagnose without continuous commissioning and the root cause of problems may continue for weeks.