Troubleshooting. Graco 333208E, Electric High Pressure Airless Sprayer

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Troubleshooting. Graco 333208E, Electric High Pressure Airless Sprayer | Manualzz

Troubleshooting

Troubleshooting

NOTE: Check all possible remedies before disassembling pump.

NOTE: The LED on the driver will blink if an error is detected.

Problem Cause Solution

Pump output low on both strokes

No output

Pump will not operate

No pressure

Inadequate power supply.

Exhausted fluid supply.

Clogged fluid outlet line, gun*, etc.; hose inner diameter too small.

Worn piston packing.

Improperly installed intake or piston check valves.

Exhausted fluid supply.

Inadequate power supply.

Exhausted fluid supply.

Clogged fluid hose or gun*.

Fluid dried on piston rod.

Driver parts are worn or damaged.

Fluid leaking from rupture disk.

See Power Supply

, page 6.

Refill and prime pump.

Clear hose, outlet check valve, or gun; use hose with larger inner diameter.

Replace. See lower manual.

Check and repair. See lower manual.

Refill and prime pump.

See Power Supply

, page 6.

Refill and prime pump.

Clean hose or gun.

Disassemble and clean pump. See lower manual. In future, stop pump at bottom of stroke. Keep wet-cup filled with compatible solvent.

Repair or replace driver.

Replace rupture disk with new one; do not replace with pipe plug.

Driver does not turn on

(fans may still run)

Leaking drain valve.

Over voltage (over 300 V)

No power to control board.

Output low on down stroke Open or worn intake valve.

Output low on upstroke Open or worn piston valve packings.

Erratic or accelerated pump speed

Fluid supply exhausted.

Clogged suction.

Cycles or fails to hold pressure at stall

Close or replace.

See Power Supply

, page 6.

Verify power supply is connected.

Check junction box connections.

Clear or service intake valve.

Clear piston valve; replace packings.

Refill supply and prime pump.

Clean suction tube.

Open or worn piston valve packings.

Open or worn intake valve.

Clogged gun, hose, outlet, etc.

Open or worn outlet check valve

Clear piston valve; replace packings.

Clear or service intake valve.

Clear gun, hose, outlet, etc.

Clear or service outlet check valve.

Worn intake or piston valves or seals.

Service lower. See Xtreme Lower Removal ,

page 19, and lower manual (311762).

333208E 15

Troubleshooting

Problem

Air bubbles in fluid

Poor finish or irregular spray pattern

Driver does not turn over and LED is off

Cause

Loosen suction line.

Agitator/mixer is not submerged.

Agitator/mixer RPM is too high.

Incorrect fluid pressure at gun.

Fluid is too thin or too thick.

Dirty, worn, or damaged spray gun.

Over voltage (greater than 300 V)

No power to control board

Solution

Tighten suction line connections. Use compatible liquid thread sealant or PTFE tape on connections.

Submerge agitator/mixer.

Lower RPM.

See spray gun manual. Read fluid manufacturer’s recommendations.

Adjust fluid viscosity. Read fluid manufacturer’s recommendations.

Service spray gun. See spray gun manual.

Check power supply

Contact your Graco distributor or Tech Service for more information.

Cycle power.

Driver does not turn over and LED is on

Encoder fault

Recalibrate the encoder following the procedure listed in the Electric Driver Manual

(333233).

Oil is leaking Oil was over-filled

Contact your Graco distributor or Tech Service for more information.

Drain and refill as stated in Check Oil Level ,

page 13.

Drain plug not tightened properly

Seal cartridge o-ring missing or damaged.

Torque to 18-23 ft-lb (25-30 N•m).

Replace shaft bearing assembly.

* To determine if fluid hose or gun is obstructed, follow Pressure Relief Procedure

, page 10. Disconnect fluid hose

and place a container at pump fluid outlet to catch any fluid. Turn pressure adjustment knob just enough to start pump. If pump starts, the obstruction is in fluid hose or gun.

16 333208E

Troubleshooting

Error Codes

Error codes can take two forms:

Alarm: alerts you to the alarm cause and shuts down the pump.

Deviation: alerts you to the problem, but pump may continue to run past the set limits until the system’s absolute limits are reached.

NOTE: The blink code is displayed using the power indicator (L) on the driver. The blink code given below indicates the sequence. For example, blink code 2 indicates two blinks, a pause, then two more blinks, and then repeats.

/

NOTE: To clear an error code, first try turning the pressure adjustment knob (H) counterclockwise until it stops.

If the status indicator (L) does not stop blinking shortly after turning the knob to zero, cycle the power by turning the power switch (E) to OFF.

Power Saving Mode

When fast blinking is displayed, the sprayer has entered

Power Saving Mode mode. When the sprayer is on and pressurized but the pump has not moved any material in

30 minutes, the sprayer will enter Power Saving Mode and will only control up to 75% of the maximum pressure.

Power Saving Mode will be exited when:

• Material starts to dispense and causes the pump to move, OR

• The pressure knob is adjusted, OR

• Power is cycled OFF and ON

(

WLD

Blink Code

1

Error Type

Alarm

2

3

Alarm

Deviation

Troubleshooting Steps

Voltage Too Low

• Verify that line voltage is within the range specified in Technical Data ,

page 25.

Use the recommended cord (see page 6).

• Cycle power and check status indicator to see if error is still active.

Voltage Too High

• Verify that line voltage is within the range specified in Technical Data ,

page 27.

• Cycle power and check status indicator to see if error is still active.

• Verify that outlet check valve is installed on pump and functions properly.

NOTE: A faulty outlet check valve can result in excessive pump speed and cause high voltage internally to the electric driver.

Low Temperature

• Warm equipment.

• Contact your Graco distributor or Tech Service for more information.

333208E 17

Troubleshooting

Blink Code

4

Error Type

Deviation

5

6

7

8

9

10

11

12, 13

Fast Flash

Alarm

Alarm

Alarm

Alarm

Alarm

Alarm

Alarm

Alarm

Deviation

Troubleshooting Steps

High Temperature

The temperature of the system is near the maximum operation temperature. The performance has been reduced to prevent the sprayer from completely shutting down.

• Check fan operation. Clean fan and driver housing. Verify fuses are intact in junction box.

• Reduce pressure, duty cycle, or gun tip size.

• Move unit to a cooler location.

Motor Temperature Fault

Motor is running too hot. Allow unit to cool.

• Check fan operation. Clean fan and driver housing. Verify fuses are intact in junction box.

• Reduce pressure, duty cycle, or gun tip size.

• Move unit to a cooler location.

Board Temperature Fault

The control board is running too hot. Allow unit to cool.

• Check fan operation. Clean fan and driver housing. Verify fuses are intact in junction box.

• Reduce pressure, duty cycle, or gun tip size.

• Move unit to a cooler location.

Encoder Calibration Error

• Cycle power and check status indicator to see if error is still active.

• Calibrate the encoder (see driver manual).

• Contact your Graco distributor or Tech Service for more information.

Encoder Error

• Cycle power and check the status indicator to see if the error is still active.

• Verify that the encoder cable is connected securely.

• The encoder may need to be replaced.

• Contact your Graco distributor or Tech Service for more information.

Software Versions Do Not Match

• Obtain software update token and follow Software Update procedure (contact your Graco distributor or Tech Service for more information).

Circuit Board Communication Failure

• Cycle power and check status indicator to see if error is still active.

• Contact your Graco distributor or Tech Service for more information.

Internal Circuit Board Hardware Failure

• Cycle power and check status indicator to see if error is still active.

• Contact your Graco distributor or Tech Service for more information.

Internal Software Error

• Cycle power and check status indicator to see if error is still active.

• Contact your Graco distributor or Tech Service for more information.

See Power Saving Mode

, page 17.

18 333208E

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