Troubleshooting 6-3 1999 Nordson CorporationAll rights reserved 107 962HIssued 11/99Manual 21-19CAUTION: Perform all resistance readings with the electricalpower source turned off. Using an ohmmeter with the powerturned on can cause instrument damage.The following chart provides steps for troubleshooting electrostaticproblems. The baselines referred to in this chart are microammetervalues that you establish when a new power supply and gun are firstinstalled. For complete information about establishing baselines andabout electrostatic problems, refer to the Electrostatic System Checksmanual.Problem Possible Cause Corrective Action1. Open circuit withmicroamp reading morethan 50 microampsabove normal, or erraticmicroamp readingsSystem shorted to ground throughfluid circuit1. Drain the fluid circuit. If conditioncontinues, go to step 2.2. Check the electrostatic cable tobetween the gun and power supplyusing a Nordson kV meter (follow theinstructions provided with the meter).Defective electrostatic cable Replace the electrostatic cable.Power supply problem Refer to the Troubleshooting section inyour power supply manual.2. Open circuit withslightly elevatedmicroamp reading (lessthan 50 microampsabove normal)Change in fluid characteristics If part coverage is correct, check thepaint formulation.Power supply setting is higher thannormalAdjust the power supply setting.3. Microamp reading belownormalPower supply setting lower thannormalAdjust the power supply setting.Open circuit Check the electrostatic cable betweenthe gun and power supply using aNordson kV meter (follow theinstructions provided with the meter).3. Electrostatic Problems

Issued

Manual

Introduction

Personal Safety

High-Pressure Fluids

Fire Safety

Halogenated Hydrocarbon Solvent Hazards

Safety Labels

H Manual

Options

Typical Heated Circulating System

Theory of Operation

Installing the Cable to the AN-8 Plus Gun

Installing the Gun

Installing the Air Flow Switch, Hoses, and Fittings

Securing the Hoses and Gun

Checking the Gun After Installation

Installing a New Extension Resistor Kit and Cable

Daily

Gun Maintenance

Mechanical Problems

Electrostatic Problems

Disassembling the Gun

Internal Parts

Replacing the Extension Resistor Service Kit and Cable

Replacing the Resistor Only

Replacing Parts and Cleaning the Gun

Assembling the Gun

External Parts

Final Assembly and Adjustments

Gun Assembly

Recommended Spare Parts

Air Valve Service Kit

Handle Replacement Kit

Extension Service Kit

Optional Isocoils

High-Conductivity Isocoil

specifications

Air Quality

Nordson AN-8 Plus Customer Product Manual

AN-8 Plus