Harbor Freight Tools 67696 User Manual - Page 16

TROUBLESHOOTING Problem Compressor will not run Motor hums but cannot run or runs slowly Fuses blow/circuit breaker trips repeatedly Thermal overload protector cuts out repeatedly Air receiver pressure drops when compressor shuts off Possible Cause Loss of power or overheating No electrical power Blown shop/house fuse Shop/house breaker open Thermal overload open Pressure switch bad Tank is full of air Low voltage Wrong gauge wire or length of extension cord Shorted or open motor winding Defective check valve or unloader Incorrect size fuse, circuit overload Wrong gauge wire or length of extension cord Defective check valve or under loader Low voltage Lack of proper ventilation/room temperature too high Wrong gauge wire or length of extension cord Loose connections (fittings, tubing, etc.) Loose drain valve Check valve leaking Solution Check for proper use of extension cord Check to be sure unit is plugged in Check fuse/breaker or motor overload Replace shop/house blown fuse Reset shop/house breaker, determining why problem happened Motor will restart when cool Replace pressure switch Compressor will turn on when tank pressure drops to cut-in pressure Check with voltmeter Check for proper gauge wire and cord length Take compressor to service center Take compressor to service center Check for proper fuse, use timedelay fuse, disconnect other electrical appliances from circuit or operate compressor on its own branch circuit Check for proper gauge wire and cord length Take compressor to service center Check with voltmeter Move compressor to well-ventilated area Check for proper gauge wire and cord length Check all connections with soap and water solution and tighten Tighten drain valve Take compressor to service center DANGER: Do not disassemble check valve with air in tank - bleed tank. Excessive moisture in discharge air Excessive water in air tank High humidity Compressor runs continuously Defective pressure switch Excessive air usage Compressor vibrates Air output lower than normal Loose mounting bolts Broken inlet valves Connections leaking 1166 Drain tank Move to area of less humidity; use air line filter Take compressor to service center Decrease air usage; compressor not large enough for tool's requirement Tighten mounting bolts Take compressor to service center Tighten connections