Troubleshooting

Problem

Cause

Solution

 

 

 

 

The pneumatic blast control circuit

See Pneumatic Blast Control Circuit,

 

is malfunctioning.

page 27.

The blast control is not

The main air regulator is stuck

See Repairing the Main Air Regulator,

engaged but blasting still

open.

page 28 (EQ600 – Kit 17C131, EQ300

occurs.

 

– Kit 17C129).

 

The blast control tubing is not

Ensure air tubing is routed and connected

 

connected properly.

properly. See Hose Schematic, page 42.

 

Electric blast control circuit is

Inspect hose cable for damaged or

 

malfunctioning.

shorted wiring. Check battery and control

 

 

panel connections. Ensure DC power

 

 

source is 12V. Check 3A fuse inside

 

 

control panel and replace it if necessary.

 

 

Check current flow in circuit, if current

 

 

exists, replace relay (EQ5179).

 

Pneumatic blast control circuit is

See Pneumatic Blast Control Circuit,

 

malfunctioning.

page 27.

The blast spray pattern is

Incorrect abrasive is being used.

Use the correct abrasive. See

irregular.

 

Metering Valve Settings, page 16.

 

The pot does not have a sufficient

Refill the pot with abrasive. See

 

amount of abrasive.

Refilling the Pot with Abrasive, page 18.

 

The pot pressure setting is

Perform the pressure relief procedure

 

incorrect.

(see Pressure Relief Procedure, page 8 )

 

 

and reset pot pressure (see

 

 

Setting Up the Equipment, page 11).

 

The Auto-Vent valve does not vent

Make sure the Auto-Vent valve

 

air when the pot is filled.

is working. Perform the Auto-

 

 

Vent cleaning procedure (see

 

 

Cleaning the Auto-Vent Valve, page 31).

 

The diaphragm valve is

Perform the diaphragm

 

malfunctioning.

flush procedure (see

 

 

Flushing the Diaphragm Valve, page 29).

 

 

If flushing does not solve problem, see

 

 

Repairing the Diaphragm Valve, page 30.

 

There is blockage inside the pot or

Make sure the ball valve is closed, then

 

inside the abrasive hose between

disconnect the cam-lock coupler. Open

 

the pot and the panel.

the abrasive ball valve slightly and make

 

 

sure abrasive is flowing form the abrasive

 

 

hose. If not, follow the shut down

 

 

procedure (see Shutting Down, page 19).

 

 

Thoroughly flush the pot and the media

 

 

hose after draining media and water.

24

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Page 24
Image 24
Graco ti25442a manual See Pneumatic Blast Control Circuit

ti25442a specifications

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