AODD Fault Diagnosis
AxFlow have 60 years experience with AODD pumps here are the many faults associated with AODD pumps
| AODD PUMP FAULT DIAGNOSIS |
| Symptom |
Cause |
| Pump won't start |
Air valve malfunction/Seizure |
| Obstructed fluid line |
| Obstructed diaphragm chamber |
| Diaphragm failure |
| Diaphragm seal failure |
| Insufficient inlet pressure |
| Insufficient differential pressure |
| Air valve system malfunction |
| Air connected to exhaust |
| Erratic flow |
Diaphragm failure on one side |
| Valve ball not seating |
| Suction leakage |
| Diaphragm failure |
| Diaphragm seal failure |
| Air valve system malfunction |
| Insufficient flow or pressure |
Discharge head too high |
| Wrong motor rotation |
| Pump not primed |
| Insufficient NPSHa |
| Liquid boiling |
| Wear on the carbon cartridges. |
| Reversed ports |
| Vanes sticking in the rotor |
| Excessive suction head |
No flow
Pump strokes - no discharge |
Air valve malfunction/Seizure |
| Excessive suction lift |
| Suction line leakage |
| Valve ball not seated correctly |
| Suction line or strainer clogged |
| Diaphragm failure |
| Fluid discharged from air exhaust |
Diaphragm Failure |
| Loose front plate |
| Intermittent stroke |
Over lubrication |
| |
Diaphragm shaft seal failure |
| |
Air valve system malfunction |
| |
Valve ball not seated/obstructed |
