Integrated Flow Control

Result of the Test

 

Cause

 

Solution

 

 

 

 

 

 

 

 

Gauge reading increases and

The problem is mechanical:

1.

Clear any clogs.

decreases as % Open value is

restriction/plugged hose

2.

Remove restrictions.

changed and fluid flow does not

change or is not present.

plugged gun tip

3. Clean and/or repair fluid regula-

 

 

 

 

 

tor.

 

fluid regulator failure

 

 

 

 

 

Gauge reading does not increase

The problem is electrical:

1. Measure the voltage to the regu-

and decrease as % Open value is

Fuse F2 is blown

 

lator at one of two places:

changed.

 

• At J5 on the fluid control

 

 

 

 

 

• disconnected wires or cables

 

board, measure across the

 

 

 

 

white (pin 1) and black (pin 6)

 

pressure control failure

 

wire connections. The volt-

 

 

 

 

age should be in the range of

 

V/P valve failure

 

0-3.3 Vdc for 0%-100% Open

 

 

 

 

command (approximately

 

• flow control board failure

 

1.65 Vdc for 50% Open).

 

 

 

 

• At J2 on the flow control

 

 

 

 

board of the module, mea-

 

 

 

 

sure across the red (pin 1)

 

 

 

 

and black (pin 2) wire con-

 

 

 

 

nections. The voltage should

 

 

 

 

be in the range of 0-21 Vdc

 

 

 

 

for 0%-100% Open com-

 

 

 

 

mand (approximately 12 Vdc

 

 

 

 

for 50% Open).

 

 

 

2. If voltage is not present, check if

 

 

 

 

fuse F2 on the fluid control board

 

 

 

 

is blown.

 

 

 

3. If voltage is present, ensure the

 

 

 

 

cable is properly connected to

 

 

 

 

the module circuit board.

 

 

 

4. If cable is properly connected,

 

 

 

 

replace pressure control, VP

 

 

 

 

valve, and flow control board

 

 

 

 

sequentially to isolate failure. See

 

 

 

 

manual 3A2097.

 

 

 

 

 

312779E

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Graco TI12553a, TI12552a important safety instructions Result of the Test Cause Solution

TI12553a, TI12552a specifications

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