Graco H50, H40, H25 Set pressure, Change pressure imbalance setting optional

Startup

9. Set pressure

ON / OFF

PARK

PSI

BAR

Motor Controls and Indicators, see page 21

a. Press to display the pressure

reading.

b.Press motor . Motor and pumps start. Display shows system pressure.

Motor must rotate counterclockwise when viewed from shaft end. See Con- nect electrical cord, page 25.

c.Adjust hydraulic pressure control until display shows desired fluid pressure.

+-

ti7731ati7732a

If display pressure is greater than desired pressure, reduce the hydraulic pressure and trigger gun to reduce pressure.

Check the pressure of each proportion- ing pump using the component A and B gauges. The pressures should be approximately equal and must remain fixed.

d. To display cycle count, press .

To clear counter, press and hold

for 3 sec.

e. Press PSI or BAR to change pres-

sure scale.

10.Change pressure imbalance setting (optional)

The pressure imbalance function (status code 24, page 43) detects conditions that can cause off-ratio spray, such as loss of feed pres- sure/supply, pump seal failure, clogged fluid inlet filter, or a fluid leak.

Code 24 (pressure imbalance) is set to an alarm as the default. To change to a warning, see Reactor Repair-Parts manual 312063.

The pressure imbalance default is factory-set at 500 psi (3.5 MPa, 35 bar). For tighter ratio error detection, select a lower value. For looser detection or to avoid nuisance alarms, select a higher value.

a. Turn main power switch OFF .

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