User's Manual

Troubleshootin

Troubleshooting

NOTE: Check all possible remedies before disassembling the system.

Color Chang

e Solenoid Valves

NOTE: Refer to Electrical Schematics, page 34. If the color change valves are not turning on or off correctly, it

could be caused by one of the following.

Cause Solution

1. Air regulator pressure

set too high or too low.

Check that air pressure is at least 85 psi (0.6 MPa, 6.0 bar). Do not go above 100

psi (0.7 MPa, 7.0 bar).

2. Airore

lectrical lines

damaged o

r connections

are loos

Visually inspect air and electrical lines for kinks, damage, or loose connections.

Service or replace as needed.

3. Solenoid failure. Check the applicable solenoid’s LED; see Color Change Board, page 32. If lit,

proceed with the following checks. If not lit, go to Cause 4.

Remove

the connector for the applicable solenoid and measure voltage across

the pin

s on the board:

• In a non-hazardous location, replace the solenoid if voltage is 24 Vdc.

• In a hazardous location, replace the solenoid if voltage is between 9–15 Vdc.

Test the valves as explained under Maintenance Screen 4 in your PD2K

Operation manual. Valves should open and close quickly. If the valves actuate

slowly, it could be caused by:

•Airp

ressuretothevalveactuatorsistoolow. SeeCause1.

•Sole

noid is clogged. Make sure the air supply has a 5 micron ﬁlter installed.

•Some

thing is restricting the solenoid or tubing. Check for air output from the

air l

ine for the corresponding solenoid when the valve is actuated. Clear the

res

triction.

30 332455F