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ADDP Manual
TROUBLESHOOTING
Problems can possibly occur and can easily be resolved by following the
instructions below.
Environmental Systems (QED) Service Department.
Excessive oil contamination from the air supply or exposure to freezing conditions
may cause damage that requires assistance from QED.
DDP ceases to draw down the fluid level.
NO AIR TO THE SYSTEM - Re-establish air to the system.
NO AIR TO THE DDP - See if air bubbler is still bubbling. Blow into well level
sensor hose or fi ing to simulate high fluid level. (See Figure 2)
- Close and open needle valve to clear possible blockage.
- Adjust primary regulator so gauge reads between 40 and 100 psi.
- Change filter elements, if clogged.
AIR BUBBLER DOES NOT BUBBLE - Close and open needle valve on far right of
pneumatic circuit to eliminate blockage. Adjust needle valve so air bubbler bubbles
about 5 bubbles per second. (See Figure 1)
EVERYTHING HAS PROPER AIR FLOW AND PRESSURE AND SYSTEM DOES
NOT FUNCTION - Disconnect the system air supply hose from the DDP and
reconnect. An exhaust of air from the male fi ing should be heard when the
hose is disconnected. This is to "shock" the DDP drive past a position of high
friction. (See Figure 1)
Revision 6 – November, 2008
Chapter 7: Troubleshooting
If you need assistance, please do not hesitate to call QED
Page 21
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