Section 6 Troubleshooting - Nordsonemanuals.nordson.com/adhesives/English_Manuals/troubled... ·...

Troubleshooting 6-1

Part 1073400A03� 2010 Nordson Corporation

Section 6Troubleshooting

WARNING: Allow only personnel with appropriate training and experienceto operate or service the equipment. The use of untrained or inexperiencedpersonnel to operate or service the equipment can result in injury, includingdeath, to themselves and others, and damage to the equipment.

This section provides quick-reference information for diagnosing melterfaults and pump operating variables as well as comprehensive melterdiagnostic information that is provided in flowchart format.

If you cannot resolve the problem using the troubleshooting flowchart,contact your Nordson representative for technical assistance.

Safety� Never disconnect cables from, or reconnect cables to, any circuit board

while the melter is energized.

� Before breaking any hydraulic connection, always relieve systempressure. Refer to Relieving System Pressure in Section 5,Maintenance.

� Refer to the safety information provided with optional equipment.

Troubleshooting6-2

Part 1073400A03 � 2010 Nordson Corporation

Melter Faults Table 6-1 lists the four types of melter faults, potential causes, and expectedcorrective actions.

Table 6-1 Melter Faults

DisplayCode/Sub-code Name Affect on Melter Cause Corrective Action

F1/None RTD Heaters turn off

The RTD for thecomponent indicatedhas failed or thecomponent wasdisconnected fromthe melter.

Replace RTD

Check hose/gunconnections

See flowchart T.2

F2/NoneUndertemperature Heaters turn off

The actual temperatureof the componentindicated has droppedbelow the undertemperature delta,which was set usingparameter 22.

Check for conditionsthat may cause a dropin ambient temperature

Raise the setpointtemperature of thecomponent

Replace RTD

See flowchart T.2

F3/None Over temperature Heaters turn off

The actual temperatureof the componentindicated has increasedbeyond the overtemperature delta,which was set usingparameter 21.

Replace RTD

See flowchart T.2

F4/1 RAM testMelter stopsfunctioning

Internal RAM failure Replace CPU

F4/2Internal Clocktime

Heaters remain on,but fault conditionpersists

Internal clock failure Replace CPU

F4/4Internal clockbattery backedRAM


Battery-backed RAMfailure

Replace CPU

F4/5Internal clockbattery


Battery-backed RAMbattery dead

Replace CPU

Continued...

Troubleshooting 6-3


Table 6-1 Melter Faults (contd)

DisplayCode/Sub-code Name Affect on Melter Cause Corrective Action

F4/6 Analog-to-digitalMelter stopsfunctioning

RTD analog-to-digitalconverter failed

Replace main board orCPU

F4/7Analog-to-digitalcalibration

Melter stopsfunctioning

Failed hose or gun

RTD analog-to-digitalconverter could not becalibrated

Replace hose or gun.Note: Set setpoint tozero to avoid F1 fault.

Replace main board orribbon cable, or CPU

F4/8Main boardfeedback


Communication failurebetween main boardand CPU

Replace main board,ribbon cable, or CPU

F4/A ThermostatMelter stopsfunctioning

Tank or manifoldthermostat is open

Replace thermostat,XP6 harness, or mainboard

F4/CExpansion boardconnection


Ribbon cableP/N 1026662 is notconnected at J1 on themain board and/or at J2on the expansion board

Check the ribbon cableconnections and makeconnections asapplicable.

F4/dCommunicationswith optional I/Ocard


Communication failurebetween CPU and theoptional I/O card

Replace the I/O card orCPU

F4/EFieldbuscommunicationsfailure

Alert output (ifoutput option 6 isselected)Melter continues tooperate normally.

Fieldbus card failure. Replace the Fieldbuscard

Troubleshooting6-4


Pump Operating Variables When diagnosing apparent melter malfunctions, it is helpful to understandthe following variables that control the status of the pump—enabled,disabled, running—and the associated indication that is provided by thepump LED.

� Use/activation of a remote input to control the motor

� Use of parameter 8, Automatic Pump On

� Ready status of the melter

� Activation of a switched input (handgun or footswitch)

� Activation of the pump key

Table 6-2 provides the status of the pump LED for each combination of thepump operating variables.

Troubleshooting 6-5


Table 6-2 Pump Operating Variables

Pump LEDStatus

RemoteMotor Input

Assigned(See Note A)

RemoteMotor Input

Status(See Note B)

AutomaticPump On

(Parameter 8)

Motor Mode(See Note C)

UnitReadyStatus

Pump KeyPress Status(See Note D)

SwitchedInput

Status

MotorRotating

Single greenflash, thenoff

Not Assigned N/A Disabled Standard No Ignored N/A No

Off Not Assigned N/A Disabled Standard Yes Off N/A No

Green Not Assigned N/A Disabled Standard Yes On N/A Yes

Off Not Assigned N/A Enabled Standard No Off N/A No

Yellow Not Assigned N/A Enabled Standard No On N/A No

Off Not Assigned N/A Enabled Standard Yes Off N/A No

Green Not Assigned N/A Enabled Standard Yes On N/A Yes


Not Assigned N/A Disabled Manual No Ignored On/Off No

Off Not Assigned N/A Disabled Manual Yes Off On/Off No

Yellow Not Assigned N/A Disabled Manual Yes On Off No

Green Not Assigned N/A Disabled Manual Yes On On Yes

Off Not Assigned N/A Enabled Manual No Off On/Off No

Yellow Not Assigned N/A Enabled Manual No On On/Off No

Off Not Assigned N/A Enabled Manual Yes Off On/Off No

Green Not Assigned N/A Enabled Manual Yes On On Yes

Yellow Not Assigned N/A Enabled Manual Yes On Off No


Assigned On/Off Disabled Standard No Ignored N/A No

Off Assigned On Disabled Standard Yes Off N/A No

FlashingGreen

Assigned Off Disabled Standard Yes On N/A No

Green Assigned On Disabled Standard Yes On N/A Yes

Off Assigned On/Off Enabled Standard No Off N/A No

Off Assigned On/Off Enabled Standard Yes Off N/A No

Yellow Assigned On/Off Enabled Standard No On N/A No

FlashingGreen

Assigned Off Enabled Standard Yes On N/A No

Green Assigned On Enabled Standard Yes On N/A Yes

NOTE A: If any of Parameters 30−39 are set to 3 or 11, then the remote motor input is assigned.

B: If the remote motor input is assigned, then its status is described in this column.

C: Manual mode is for handgun and footswitch applications.

D: “On” means the pump key was pressed and the unit accepted the key press. “Ignored” means that thepump key will not respond to a key press.

a

b

Troubleshooting question and actionblocks

a) Question b) Action

Troubleshooting6-6


Using the Troubleshooting Flow Chart The flowchart, which is provided at the end of this section, is designed toassist you in diagnosing and correcting a complete or partial stop in hot meltoutput from the guns. The chart is organized in a simple question-actionblock format. If your response to a question is yes (Y), continue downwardin the chart to the next question or action block. If you response is no (N),continue to the right to the next question or action block. All diagnostic pathswithin the chart end with an action block that specifies one of the followingthree courses of action:

� Refer to information provided elsewhere in this manual

� Replace a component

� Complete a diagnostic procedure (DP.x)

To return your melter to service as quickly as possible, the chart is designedunder the assumption that it is preferable to immediately replace a faultyassembly as opposed to conducting detailed diagnostics and repair of theassembly while the melter is out of service.

Use of the chart assumes that the melter is installed correctly and that it isset up to support the current manufacturing process. Refer to Section 3,Installation, for information about installing and setting up the melter.

Troubleshooting Quick-checksBefore using the troubleshooting charts confirm:

� whether or not service was recently performed on the melter or themelter’s settings were recently adjusted.

� the correct voltage plug is installed on terminal J1. Refer to Section 3,Installation, for information about selecting the correct voltage plug.

� external inputs (if used) are functioning properly.

� the standby or clock functions are not turned on (if not required orexpected at the current time).

Troubleshooting 6-7


Returning the Melter Setup to Factory Settings By returning the melter to its factory setting many common melter problemscan be isolated to either a problem with the melter settings or the melterhardware.

To return the melter to its factory settings, simultaneously press and holdthe Setup key and the right-display UP arrow key, and then, while holdingdown these keys, cycle the melter control switch off and on. When themelter restarts, release the two keys.

Identifying Electrical Components Tables 6-3 through 6-6 provide detailed descriptions of the circuit boardindicators, connection points, and test points that are referred to in thetroubleshooting chart. Figure 6-1 illustrates the location of each of thesecircuit board components.

Table 6-3 Main Board Components

Item Number Type DescriptionIndicators

DS2 Neon Power to tank heater

DS3 Neon Power to pump heater

DS4 Neon Power to 5 VDC and 24 VDC power supplies

DS5 Neon Power to hose/gun 1 heaters

DS6 Neon Power to hose/gun 2 heaters

DS7 Neon Power to motor

DS8 LED Control signal for hose 1 heater

DS9 LED Control signal for gun 1 heater

DS10 LED Control signal for tank heaters

DS11 LED Control signal for motor

DS12 LED Control signal for gun 2 heater

DS13 LED Control signal for hose 2 heater

DS14 LED Control signal for pump heater

DS15 LED +5 VDC control voltage present

DS17 LED Trigger closure present at XP3 or XP4

Fuses

F1/F2 −− Tank heaters (10 A, 250 V, fast-acting)

F3/F4 −− 5 VDC and 24 VDC power supplies (2A, 250 V, slow-blow)

F5/F6 −− Pump heater (5 A, 250 V, fast-acting, 5 x 20 mm)

F7/F8 −− Hose/gun 1 heaters (6.3 A, 250 V, 5 x 20 mm)

F9/F10 −− Hose/gun 2 heaters (6.3 A, 250 V, 5 x 20 mm)

F11/F12 −− Motor power (6.3 A, 250 V, 5 x 20 mm)

Continued...

Troubleshooting6-8


Identifying Electrical Components (contd)

Table 6-3 Main Board Components (contd)

Item Number Type DescriptionConnection Points

XT1 Input High-voltage power connection to board

J1 Input/output Signal ribbon cable between main board and CPU

XP1 Output Control voltage to gun solenoid 1

XP2 Output Control voltage to gun solenoid 2

XP3 Input Switch closure from handgun 1

XP4 Input Switch closure from handgun 2

XP5 Output Control voltage to pump RTD

XP6 Output Control voltage to tank RTD and tank overtemperature thermostat

X1 Output High-voltage to pump heater

X2 Output High-voltage to tank heaters

X3 Output High-voltage to motor

X4 Output High-voltage and control voltage out to hose/gun 1

X5 Output High-voltage and control voltage out to hose/gun 2

X6 Output 24 VDC to expansion board

X7 Input Unit on/off control switch

Test Points

TP7 Contact +5 VDC control voltage present

TP2 Contact Circuit common of low-voltage power supply

Table 6-4 Expansion Board Components


DS1 LED 24 VDC present at X3

Connection Points

XT1 Output AC power into board

XT2 Output AC power out to power module (Hose/Guns 3 and 4)

XT3 Input AC power out to main board

XT7 Output/Input Positions 1–6 are control outputs; Positions 7–14 are control inputs

X1/X2 Jumper Input voltage configuration plugs

X3 Input 24 VDC in from main board

X4 Input/output Ribbon cable connection between expansion board and power module(Hose/gun 3 and 4)

J2 Input/output Ribbon cable connection between expansion board and main board

Troubleshooting 6-9


Table 6-5 Power Module Components


N1 Neon Hose 4 is turned on

N2 Neon Gun 4 is turned on

N3 Neon Hose 3 is turned on

N4 Neon Gun 3 is turned on

Connection Points

J1 Input/output Ribbon cable connection between power module and expansion board

J2 Input/output Connection point for the wire harness between hose/gun 4 and the powermodule

J3 Input/output Connection point for the wire harness between hose/gun 3 and the powermodule

J4/J5 Input AC power input from XT2 on the expansion board

Fuses

F1, F2 −− Hose 4 and gun 4

F3, F4 −− Hose 3 and gun 3

Troubleshooting6-10


Identifying Electrical Components (contd)

Table 6-6 Part Numbers of Cable and Boards in Figure 6-1

Identifier Component Connection One Connection Two Part NumberB1 Expansion board Not applicable Not applicable 1031201

B2 Main board Not applicable Not applicable 1031200

B3 Power module Not applicable Not applicable 1031202

B4 CPU board Not applicable Not applicable 1028325

C1 Cable Tank heaters X2 (TANK CONN) onmain board

See Note A

C2 Cable Tank thermostat and RTD XP6 (TANK RTD) onmain board

1031234

C3 Cable Pump RTD XP5 (PUMP RTD) onmain board

1031233

C4 Cable Pump heater X1 (PUMP CONN) onmain board

See Note A

C5 Cable Motor bulkheadconnector

X3 (MOTOR CONN) onmain board

1055958 (240V)

NOTE: The motor cable is included with the motorassembly and is not available separately.

C6 Cable XT2 on expansion board J4/J5 on power modules 1027340

C7 Cable XT3 on expansion board XT1 on main board 1027341

C8 Cable X3 (24V SUPPLY) onexpansion board

X6 on main board 1027342

C9 Cable XP1 or XP2 on mainboard

Gun solenoid 1 or 2 1045269

C10 Cable X4 or X5 (HOSE/GUN)on main board

Hose/gun 1 and 2receptacles on backpanel

1024925 (240V)

Cable J3 or J2 (HOSE/GUN) onpower module

Hose/gun 3 and 4receptacles on backpanel

1024925 (240V)

C11 Cable X7 (PWR SWITCHINPUT) on main board

Control switch onelectrical cabinet door

1026663

C12 Cable XP3 or XP4 (HANDGUNTRIG INPUT) on mainboard

Switch receptacles onback panel

1025746

RC1 Ribbon cable X4 on expansion board J1 on power module 189211

RC2 Ribbon cable J1 on CPU board J1 on main board and J2on expansion board

1026662

RC3 Ribbon cable J3 on CPU board RS232 connector onelectrical cabinet door

1029938

NOTE A: Refer to Heaters in Section 7, Parts, for heater kit part numbers.

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Expansion Board (B1)

C6

RC1

RC2

C1

C2

C3

C4

C5

C7

C8

C9 C9

C10

C10

Main Board (B2)

C11

C12

C12

C10C10

RC3

CPU Board (B4)

Power Module (B3)

Back Panel

Control Switch

Figure 6-1 Location of electrical components (refer to Table 6-6 for part numbers)

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+

−

No adhesive output from one or more guns

Go toT.3

+

−

+

−

Do dashes appear in boththe left and right display?

Turn the control switch on.Does the melter start?

Stop.

+

−

Upload new software.

Refer to Appendix C.

+

−

Do the words UP LOADappear across thedisplays?

Is the wire harness that isconnected to terminal X7on the main board loose?

Turn the control switch off,secure the harness toterminal X7, and then turnthe control switch back on

+

−

Is the fault LEDilluminated?

Replace the control switch.

P/N 1017947.

Has glue output stoppedfrom all guns?

+

−

Is the ready LEDilluminated?

+

−

Is the control panelilluminated?

Go toT.1

Go toT.5

Go toT.4

DuraBlueTroubleshooting

Charts

Start

Go toT.2

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Control panel is not illuminated

T.1

+

−

+

−

Is there power at terminalblock XT1 on theexpansion board?

See Figure 6-1.

+

−

Is the power disconnectswitch that is serving themelter turned on?

Is the correct voltage plugsecurely attached toconnectors X1/X2 on themain board? Refer toTable 3-4, Section 3,Installation.

+

−

Is there power at terminalXT1 on the main board?

Check the plant wiringbetween the disconnectswitch and the melter.

Turn the disconnect switchon.

Replace/secure thevoltage plug.

Check the wire harnessbetween connector XT3 onthe expansion board andterminal block XT1 on themain board.

See Figure 6-1.

+

−

Have fuses F3/F4 on themain board blown?

See Figure 6-1.

Replace both fuse F3 andfuse F4.

P/N 1031203

Replace the main board.

P/N 1031200

+

−

Is the power on the plantside of the disconnectswitch that is serving themelter?

Check/repair the plantwiring.

Go to T.1.1

+

−

Is indicator DS4 on themain board illuminated?

See Figure 6-1.

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T.1.1

+

−

+

−

Is the green power LED onthe CPU boardilluminated?

See Figure 6-1.

+

−

Is the voltage across TP7(+) and TP2 (−) on themain board between 4.75and 5.25 VDC?

See Figure 6-1.

Is the voltage across TP2(+) and TP4 (−) on theCPU board between 4.75and 5.25 VDC?

See Figure 6-1.

+

−

Is the red CPU fault LEDilluminated?

See Figure 6-1.


P/N 1031200

Check the ribbon cable orreplace the CPU board.

CPU - P/N 1028325

Replace the CPU board.

P/N 1028325

+

−

+

−

Does changing the mainboard correct the problem?

P/N 1031200

Secure or replace thecable.

P/N 1026662

Is the ribbon cablebetween the main boardand the CPU board looseor visibly damaged?

See Figure 6-1.

Secure or replace thecable.

P/N 1026662

+

−

Contact Nordson fortechnical assistance.


P/N 1031179

Does changing the CPUboard correct the problem?

P/N 1028325

Stop.

+

−

Is LED DS15 on the mainboard illuminated?

See Figure 6-1.


P/N 1031200

+

−

Is the ribbon cablebetween the main boardand the CPU board looseor visibly damaged?

See Figure 6-1.

Control panel is notilluminated >

Disconnect switch is on >

DS4 is illuminated

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Fault LED is illuminated

T.2

?

+

−

Is the tank key LEDilluminated?

Confirm that the RTD hasfailed.

+

−

Go toT.2.1

+

−

Are all of the gun-to-hoseand hose-to-melterelectrical cordsets securelyconnected?

Does the fault reoccur ifyou move the faultinghose/gun pair to a knowngood hose/gun connector?

Replace the hose orreplace the gun RTD.

Refer to the hose or gunmanual.

Go toT.2.2

Secure the electricalconnectors and then pressthe reset key.


Record the fault codesindicated in both the leftand right displays and thencontact Nordson fortechnical assistance.

+

−

Is an F1 (RTD) faultindicated in the rightdisplay?

+

−

Is an F2(undertemperature) faultindicated in the rightdisplay?

+

−

Is an F3 (overtemperature)fault indicated in the rightdisplay?

+

Is an F4 fault indicated inthe right display?

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+

−

+

−

Reset the melter and turn the heaters back on Fault LED is illuminated >

F2 fault exists

T.2.1

Go toT.2.3

Was hot melt recentlyadded to the tank?

?Allow the tank to reachsetpoint temperature.

Secure the loose cordsetand then press the Resetkey.

+

−

Repair the hose or guncordset. Refer to the hoseor gun manual.

Is the power indicator forthe affected hose/gunilluminated?

See Figure 6-1.

+

Replace the main board(hose/gun 1 or 2 affected)or replace the powermodule (hose/gun 3 or 4).

Main board P/N 1031200Power mod. P/N 1031202

+

−

Is the voltage across thefuse pair for the affectedhose/gun correct?

See Figure 6-1 and refer toTable 6-3.

Replace the hose orreplace the gun RTD.Refer to the hose or gunmanual.

Correct the factory voltageor replace the hose/gunwith a properly ratedhose/gun.

+

−

Are any one of indicatorsDS2, DS3, or DS7 on themain board illuminated?

See Figure 6-1.

Check/replace fuse pairsF7/F8 or F9/F10 on themain board.

P/N 1031203See Figure 6-1.

+

−

Is the tank key LEDilluminated?

+

−

Is the affected gun or hosecordset loose? (The tankor the hose key LED isilluminated.)

+

−

Are the hose or guncordset pins bent, loose, orcorroded?

Does the fault reoccur ifyou move the faultinghose/gun pair to a knowgood hose/gun connector?

Check the operation of thepower relay or thermostat.

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+

−

Reset the melter and turn the heaters back on

Fault LED is illuminated >

F3 fault exists

T.2.2

Is there a DC drive nearthe melter?

?

Stop.

+

−

Does installing an RCsnubber on the DC driveand resetting the melterclear the fault?

P/N 332182

Stop.

+

−

Does electrically groundingthe melter’s chassis to theparent machine/supportand then resetting themelter clear the fault?

Correct the setpointtemperature of thecomponent or increase theovertemperature setpoint.

Install an RC snubber onthe melter.

P/N 332182

+

−

Is the tank/pump TRIACoperating properly?

Replace the grid orreservoir RTD.

P/N 1031234


P/N 1031200

Go toT.2.4

+

−

Is more than onecomponent overheating?(Check the actualtemperature of the faultingcomponent.)

+

−

Is the tank LEDilluminated?

+

−

Was the setpointtemperature of the faultinghose/gun just reduced?

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+

−


F2 fault exists >

Tank key LED is illuminated >

No hot melt was recently added to thetank

T.2.3?

+

−

Is the resistance correctfor the tank heaters (2)and the pump heater (1)?Refer to HeaterSpecifications in Section 8for resistance values.

+

−

Is the voltage across thedownstream side of fusesF1 and F2 on the mainboard 180−265 VAC?

See Figure 6-1.

Are the tank and pumpTRIACS functioningproperly?

? Contact Nordson fortechnical assistance.

+

−

Are the tank and manifoldRTDs functioningproperly?

Replace the tank or thepump heater.

Refer to Section 7, Parts.

Check/correct housevoltage.


P/N 1031200

Replace themalfunctioning RTD.

Tank - P/N 1031234Pump - P/N 1031233

Stop.

+

−

Does replacing fuses F1and F2 on the main boardand then resetting themelter clear the fault?

P/N 1028329


P/N 1031200

+

−

Are any of the indicatorsDS2, DS3, or DS7 on themain board illuminated?

See Figure 6-1.

+

−

Is the power indicator forthe affected hose/gunilluminated?

See Figure 6-1.

Check the operation of thepower relay or thethermostat.

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An F3 fault exists on a hose or gun >

The setpoint temperature was notchanged

T.2.4

Stop. Replace the main board.

P/N 1031200

+

−

Does replacing the mainboard and resetting themelter clear the fault


P/N 1031179

+

−

Does the fault clear if youswitch the faultinghose/gun pair to a knowngood hose/gun connectorand then reset the melter?

+

−

Does the fault clear if youreplace just the hose orjust the gun RTD and thenreset the melter?

+

−

Have LEDs DS8/DS9 orDS12/DS13 on the mainboard stopped flashing?

See Figure 6-1.

Stop.

Replace the main board(hose/gun 1 or 2 affected)or replace the powermodule (hose/gun 3 or 4).

Main board P/N 1031200Power mod. P/N 1031202

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+

−

No faults >

Ready LED is not illuminated

T.3

Does the right displayindicate that componentsare still heating up?

?Wait for all components toreach setpointtemperature.

+

−

Wait the the input to initiatethe heaters or use theHeaters key to manuallyturn the heaters on.

Is the ready delay countingdown?

Wait for the ready delay tocount down.

Refer to Appendix B,parameter 4.

+

−

The current clock schedulehas the heaters turned off.

Is the standby LED on?

The melter is in thestandby mode.

Refer to Standby Key inSection 4, Operation.


+

−

Is the Heaters key LEDilluminated?

+

−

Is a remote input beingused to control theheaters?

+

−

Is the clock LED on? Press the Heaters key toturn the heaters on.

?

+

−

Replace the tank or thepump heater.


Is the resistance correctfor the tank heaters (2)and the pump heater (1)?Refer to HeaterSpecifications in Section 8for resistance values.

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No faults >

Ready LED is illuminated >

No hot melt output from all guns

T.4

Go toT.4.2

The melter is waiting for anexternal input before themotor will start.

Stop.

+

−

Does the motor start if youactivate the gun trigger orfoot switch?

+

−

Is the setpoint temperatureof the tank below thetemperaturerecommended by themanufacturer of the hotmelt?

+

−

Is the gun trigger cordsetor foot switch properlyconnected to the back ofthe melter. Refer toConnecting Hoses andGuns in Sec 3, Installation.

Adjust the setpointtemperature of the tank.

Connect the cordset orfoot switch.

Go toT.4.1

+

−

Is the motor running?

+

−

Is the pump key LEDflashing yellow?

+

−

Is the pump key LEDilluminated yellow, but notflashing?

+

Press the pump key toenable the pump.

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No faults >


No hot melt output from all guns >

Motor is not turning >

All motor start conditions are correct >

Tank setpoint temperature is correct

T.4.1

?

+

−

Is the motor excessivelyhot?

+

−

Is the electrical harnessthat exits the motorjunction box connected tothe receptacle underneaththe melter?

Replace the driveassembly.

Refer to Section 7, Parts,for drive assembly partnumbers.

+

−

Does swapping the mainboard with a known goodboard correct the problem?

Connect the harness.

Stop.Contact Nordson fortechnical assistance.

+

−

Is indicator DS7 on themain board illuminated?

Replace fuses F11 andF12.

P/N 1031203

?

+

−

Allow the motor to cooland then automaticallystart once its internalthermostat resets. Doesthis correct the problem?

Stop.

?

+

−

Is the pump operatingcorrectly?

Replace the pump.

Refer to Section 7, Parts,for pump part numbers.

Troubleshooting6-34

Part 1073400A

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2010 Nordson C

orporation

Troubleshooting6-35

Part 1073400A

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2010 Nordson C

orporation

No faults >


No hot melt output from all guns >

Motor is turning

T.4.2

Fill the tank.

Repair the pump ormanifold seals.

Refer to Section 7, Parts,for service kits.

+

−

Is the direction of thepump shaft rotationcorrect?

+

−

Is the tank isolation valveclosed?

See Figure 6-2.

Turn the valvecounterclockwise to open.

+

−

Is the pressure controlvalve turned fullycounterclockwise (nopressure)?

Adjust the pressure controlvalve.

Refer to Adjusting thePressure Control Valve inSection 3, Installation.

+

−

Check and clean orreplace the pressurecontrol valve.


Is the filter excessivelydirty?

Refer to Replacing theFilter in Section 5,Maintenance.

Replace the filter.

50-mesh P/N 1021941100-mesh P/N 1028305200-mesh P/N 1021918

+

−

Is the tank empty?

+

−

Is the pump input shaftturning?

Replace themotor-to-pump coupling orreplace the shaft key.

−

+

Is there hot melt leakagearound the pump ormanifold?

Replace the capacitor.Refer to the motor partslist in Section 7, Parts, forthe correct capacitor partnumber.

Troubleshooting6-36

Part 1073400A

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2010 Nordson C

orporation


Troubleshooting6-37

Part 1073400A

03�

2010 Nordson C

orporation

No faults >


No hot melt output from some guns

T.5

?The heaters in the affectedhose/gun may be turnedoff by the remote input.

−

+

Is the melter set up for aremote hose/gun input?

?

Check the operation of thegun, gun solenoid, andgun driver. Refer to theappropriate equipmentmanuals.

+

−

Is the switching deviceproperly connected to theback of the melter?

Refer to Connecting Hosesand Guns in Section 3.

+

−

Are you using a switchedhandgun or a foot switch totrigger the pump?

Connect switching device.

+

−

Is the setpoint temperatureof the affected hose/gunwithin the temperaturerange recommended bythe hot melt manufacturer?

Adjust the setpointtemperature.

+

−

Is the affected hose/gun atits temperature setpoint?

?

+

−

Is the system hydraulicpressure correct (allowingthe gun solenoids tooperate properly)?

Correct the systempressure.

Troubleshooting6-38

Part 1073400A

03�

2010 Nordson C

orporation


Troubleshooting 6-39


1

2

Figure 6-2 Opening the tank isolation valve

1. Open2. Closed

Troubleshooting6-40


Section 6 Troubleshooting - Nordsonemanuals.nordson.com/adhesives/English_Manuals/troubled... ·...

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Transcript of Section 6 Troubleshooting - Nordsonemanuals.nordson.com/adhesives/English_Manuals/troubled... ·...