PatternPro Variable Pitch Guns.pdf - 第38页

34 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. Pla…

P/N 1048257_03

 2018 Nordson Corporation

PatternPro

Edition 02/18

Troubleshooting Table (contd)

Table 5 Troublehooting Table

(contd)

Problem Possible Cause Corrective Action

5. Modules not

triggering at the

same time on

multi‐module

applicator

Applicator module adjustment

screw not properly set (all

applicators except MiniBluell)

Contact Nordson technical support.

Module failed Replace the O‐ring. Refer to Replacing the

Rotating Disk and applicator Module in Repair.

Insufficient applicator air

pressure

Increase the applicator air pressure.

6. Applicator fails to

heat or underheats

No power Check that the melter is on. Refer to the melter

manual.

Applicator temperature setting

too low

Adjust the temperature setting. Refer to the

melter manual.

Applicator heater failed (open

or short)

Check for an open heater circuit. Refer to DP4.

Applicator RTD failed (open or

short)

Check the RTD resistance. Refer to DP4.

7. Applicator

overheats

Melter, hose, or applicator

temperature setting too high

Adjust the setting. Refer to the melter manual.

Applicator RTD shorted

(melter should shut down)

Check the RTD resistance. Refer to DP4.

Short in heater control circuit Troubleshoot the melter. Refer to the melter

manual.

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