Troubleshooting
6-7
Part 1079832_04
E 2015 Nordson Corporation
Troubleshooting Procedures
Use these troubleshooting procedures as directed in the Troubleshooting
Tables part of this section.
Checking Solenoid Valve Mechanical Operation
Solenoid valves are used to control the module‐actuating air. Follow this
procedure to check the mechanical operation of a solenoid valve. To check
the electrical operation of a solenoid valve, refer to the next procedure,
Checking Solenoid Valve Electrical Operation.
1. Turn on the air supply to the solenoid valve.
2. Trigger the applicator at the solenoid valve and check for adhesive flow:
S If adhesive flows from the module, the solenoid valve is operating
normally. Return to the appropriate troubleshooting table.
S If no adhesive flows from the module, continue to the next step.
3. Manually trigger the solenoid valve and listen to its response:
S If you hear a clicking noise, the valve is operating normally. Return to
the appropriate troubleshooting table.
S If you do not hear a clicking noise, the solenoid valve is not engaging.
This could be caused by an electrical problem or by low air pressure
to the solenoid valve. To check the solenoid valve electrically, go to
the next procedure, Checking Solenoid Valve Electrical Operation. To
check the air pressure regulator, go to Checking an Air Pressure
Regulator later in this section.
Checking Solenoid Valve Electrical Operation
Solenoid valves are used to control the module‐actuating air. Follow this
procedure to check the electrical operation of a solenoid valve. To check the
mechanical operation of a solenoid valve, refer to the previous procedure,
Checking Solenoid Valve Mechanical Operation.
1. Disconnect and lock out electrical power to the solenoid valve.
2. Disconnect the solenoid valve wires.
3. Connect a standard ohmmeter across the solenoid valves wires to check
the solenoid valve coil for electrical continuity:
S If the resistance is excessively high, there is no continuity. Replace
the solenoid valve.
S If the resistance is normal, return to the appropriate troubleshooting
table.
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