Chapter 7: Troubleshooting & Repairs
Problems may occur and usually can be easily resolved by following these instructions. If, after careful reading and
service, you cannot resolve the problem, please contact the QED Environmental Systems (QED) Service Department
at (800) 537-1767.
Troubleshooting
1. Air Supply
•
•
If the air pressure exceeds the design limitations of the pump, the pump may fail to cycle, or the exhaust
may have locked up and caused air to enter the fluid discharge.
The fluid level must be above the fluid inlet on a Top-Loading pump. On a Bottom-Loading pump, the fluid must
be no lower than 9 inches below the head of the pump
2. Fluid Level
•
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•
• .enil yrevocer ropav gninoitcnuf a ro erehpsomta eht ot detnev eb tsum llew eht ,llew eht ni stsuahxe ria eht fI
The air exhaust outlet must be above the fluid level
X1. X
X2.
X3. X
X4.
5. Debris, Scale or Very
Viscous Fluid
7. Debris in Air Inlet
Valve
8. Fluid Check Valve
X
X
X
X
6. Lever Pivot Wear X
X
X
X
9. Valve Timing
Pump Not Cycling
Possible Causes
Symptoms
Pump Not Cycling,
Volume is Reduced or
There is No Discharge
Air in Fluid or
Discharge
Detailed Instructions
Follow This Chart
Air Supply
Fluid Level
Fluid Inlet Clogged
Air Exhaust Restricted
Revision 3 - December, 2013Revision 3 - December, 2013
Caution: Wear goggles, gloves, and coveralls when servicing this system.After troubleshooting is
completed and before assembling the pump, slowly move the float through its range to ensure that the
lever will trip even if thepump fills and empties slowly.
If the air pressure is too low, or if the flow is severely restricted, the pump will not cycle. The minimum air
pressure requirement for pump operation is 0.5 psi
(.03 Bar) per foot(30cm) of vertical static head.
19
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