ELECTRICAL TESTS
The performance of the spray gun is directly affected by the condition of the electrical components contained inside the gun. The electrical tests below can be used to determine the condition of the power supply (5) and the resistor stud (17) as well as the continuity of the electrical path between the components.
Use megohmmeter 218±979 (see ACCESSORIES) and an applied voltage of 500 volts to complete these electri- cal tests. Connect the leads as shown.
WARNING
To reduce the risk of sparking, which could cause fire or explosion and result in serious bodily injury, DO NOT use the megohmmeter in the hazardous area. Remove the gun from the hazardous area before testing it.
Test Gun Resistance
NOTE: Check the resistance with the gun triggered and untriggered.
Measure the resistance between the end of the electrode
(14)and the gun air inlet adapter (86). See Fig 7. The re- sistance should be between 115 to 152 megohms. If the resistance is outside the specified range, go to the next test. If the resistance is correct, refer to the Electrical Troubleshooting Chart on page 15 for other possible causes of poor performance.
Test Power Supply Resistance
Remove the power cartridge (2) from the gun body (1). See Power Cartridge Replacement.
Remove the turbine alternator (2a) from the power sup- ply (5). See Turbine Alternator Removal.
Measure the resistance from the center prong (EE) in the power supply to the contact spring (5c) on the other end of the power supply. See Fig 8.
The resistance should be 95 to 122 megohms. If the re- sistance is outside the specified range, the power supply is defective and must be replaced. If the resistance of the power supply is correct, proceed to the next test.
If you still have problems, refer to the Electrical Troubleshooting Chart for other possible causes of poor performance, or contact the nearest authorized service agency.
KEY
A | Megohmmeter |
| |
1 | Gun Body | A | |
14 | Electrode | ||
|
86Air Inlet Adapter
1 | 86 |
|
14
Fig 7
KEY
AMegohmmeter EE Connector Prong 2a Turbine Alternator
5 Power Supply
5c Contact Spring | A |
EE
5c
52a
Fig 8
6 77
