PatternPro Variable Pitch Guns.pdf - 第39页

35 P/N 1048257_03  2018 Nordson Corporation PatternPro Edition 02/18 DP2. Check for a Clogged Nozzle or Module 1. Disable the applicator. Refer to Safety . 2. Remove the nozzle. Refer to Cleaning Nozzles in Maintenance …

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

Diagnostic Procedures (DPs)

The following diagnostic procedures (DPs) are referenced in the

Troubleshooting Table.

DP1. Check a Solenoid Valve

1. Place the system into operation.

2. Trigger the applicator using the timer or pattern controller:

 Hot melt material flows—normal indication. Return to the

Troubleshooting Table.

 Hot melt material does not flow—go to step 3.

3. Manually trigger the applicator at the solenoid valve:

 Hot melt material flows—normal indication. Return to the

Troubleshooting Table.

 Hot melt material does not flow—go to step 4.

4. Check the solenoid valve coil for continuity:

 Continuity okay—normal indication. Return to the Troubleshooting

Table.

 No continuity—failed solenoid valve. Replace the solenoid valve.

Refer to Connecting the Solenoid Valve.

NOTE: Verify that the solenoid valve being used has a rated service

temperature above 85 C (185 F).

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

DP2. Check for a Clogged Nozzle or Module

1. Disable the applicator. Refer to Safety.

2. Remove the nozzle. Refer to Cleaning Nozzles in Maintenance for the

nozzle‐removal procedure.

3. Place the applicator back into operation.

4. Trigger the applicator:

 Hot melt material flows—normal indication. Clean the nozzle. Refer to

Cleaning the Nozzles in Maintenance.

 Hot melt material does not flow—the module is clogged. Replace the

module. Refer to Replacing the Rotating Disk and applicator Module

in Repair.

DP3. Check a Heater

1. Disable the applicator. Refer to Safety.

2. Unplug the applicator cordset from the hose.

3. See Figure 10. Test for continuity across the heater circuit (pins 1 and2):

 Continuity okay—normal indication. Return to the Troubleshooting

Table.

 No continuity—the heater is defective. Replace the heater. Refer to

Replacing a RTD or Heater in Repair.

4209011A

HEATER

RTD

GND

Fig. 10 Applicator Cordset Pins

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

DP4. Check an RTD

1. Disable the applicator. Refer to Safety.

2. Unplug the applicator cordset from the hose.

3. Allow the applicator to reach room temperature or use a pyrometer to

determine the temperature of the applicator.

See Figure 10.

4. When the applicator temperature is known, measure the resistance

across the RTD circuit (pins 3 and 5).

5. See Figure 11 to determine the expected resistance of RTD at the known

temperature. Compare the expected and measured resistance values:

 Measured resistance is within the expected range—normal

indication. Return to the Troubleshooting Table.

 Measured resistance is not within the expected range—the RTD is

defective. Replace the RTD. Refer to Replacing a RTD or Heater in

Repair.

4209012A

Resistance

in Ohms

Temperature in F

Temperature in C

Nickel RTD

Fig. 11 RTD Resistance vs. Temperature