Pure Air Plus Air Dryer Troubleshooting Guide
Pure Air Plus Air Dryer Troubleshooting Guide
Troubleshooting Charging and Air supply systems
| Problem | Cause | Remedy |
| Long Purge Cycle (More Than 40 Seconds). | One-Way Check Valve Is Defective.Partially Plugged Purge Orifice. | Service Check Valve With Kit #DQ6020.Clean Orifice With .050 Drill Bit Or Wire. |
| Slow Wet Tank Build-Up. | Plugged Filter And/Or Desiccant. | Service Dryer With Kit #DQ6026. |
| Water Appears In The Wet Tank. | Desiccant Is Full Of Dirt.No Purge Cycle.Purge Orifice Is Blocked. | Service Dryer With Kit #DQ6026.See “No Purge Cycle” Section.Clean Orifice With .050 Drill Bit Or Wire. |
| Relief Valve Opens DuringOperation. | Faulty Relief Valve.Line Restrictions. | Replace Relief Valve With Part #KN31527.Replace The Line Between The Dryer And The Wet Tank If Damaged. Replace |
| Purge Cycle Causes Compressor Cut-In. | Leaking Purge Valve Seals.Oversized Or Damaged LineBetween Dryer And Governor. | Purge Valve With Kit #DQ6020.Line Should Be 3/16 I.D. Maximum.Replace If Oversized Or Damaged. |
| No Purge Cycle. | Defective Governor. | Disconnect Line From The Governor. Air Should Come From The Governor Line When The Compressor Unloads. If Not, Repair/Replace The Governor. |
| The Line Between The Governor And The Dryer Is Restricted Or Frozen | Insure Line Is Clear Of Debris And/Or Water (Ice). | |
| Purge Valve Is Stuck. | Remove Purge Valve And Replace With Kit #DQ6020. | |
| Air Is Leaking Constantly From Purge Valve. | Purge Valve Seal Is Damaged. Foreign Particles On Valve Seat. | Replace Purge Valve With Kit #DQ6020.Remove Purge Valve And Clean. |
| Purge Valve Is Frozen. | Inspect Heater (See Section On “Heater Problems”). | |
| Governor Is Faulty. | Disconnect Line To Purge Valve. If Purge Air Stops And Air Comes From Governor Line, Repair Or Replace Governor. | |
| Bad Unloader In Compressor. | Replace. | |
| Heater Is Inoperative. | Fuse Is Blown. | Check Fuse. If Blown, Replace With 8-10 AMP Fuse. |
| Broken Wires Or Poor Connections. | Repair Or Replace Wiring To The Heater. | |
| Defective Element Or Thermostat. | Replace Heater Assembly With Heater Kit. (See Back Page For Heater Kit Descriptions). | |
| Heater Stays On Continuously. | Defective Ther5mostat. | Replace Heater Assembly As Specified Above |