Pulsafeeder Pulsar Shadow - Manual (Page 36)

9. Troubleshooting Chart
Difficulty Probable Cause Remedy
Pump does not start. 1. Coupling disconnected. Connect coupling.
2. Faulty power source. Check power source.
3. Blown fuse, and circuit breaker. Replace - eliminate overload.
4. Broken wire. Locate and repair.
5. Wired improperly. Check diagram.
6. Pipe line blockage. Open valves.
No delivery. 1. Motor not running. Check power source. Check wiring diagram.
2. Supply tank empty. Fill tank.
3. Lines clogged. Clean and flush.
4. Closed line valves. Open valves.
5. Ball check valves held open with
solids.
Clean and inspect.
6. Vapor lock, cavitation. Increase suction pressure.
7. Prime lost. Reprime, and check for leak.
8. Strainer clogged. Remove and clean. Replace screen if necessary.
Low delivery. 1. Motor speed too low. Check voltages, frequency, wiring, and Terminal
connections. Check nameplate vs. Specifications.
2. Check valves worn or dirty. Clean, replace if damaged.
4. Calibration system error. Evaluate and correct.
5. Product viscosity too high. Lower viscosity by increasing product
temperature. Increase pump and/or piping size.
6. Product cavitating. Increase suction pressure. Cool product as
necessary.
Delivery gradually drops. 1. Check valve leakage. Clean, replace if damaged.
2. Leak in suction line. Locate and correct.
3. Strainer fouled. Clean or replace screen.
4. Product change. Check viscosity.
7. Supply tank vent plugged. Unplug vent.
Delivery erratic. 1. Leak in suction line. Locate and correct.
2. Product cavitating. Increase suction pressure.
3. Entrapped air or gas in product. Consult factory for suggested venting.
4. Motor speed erratic. Check voltage and frequency.
5. Fouled check valves. Clean, replace if necessary.
Delivery higher than
rated. 1. Suction pressure higher than
discharge pressure.
Install backpressure valve or consult factory for
piping recommendations.
3. Back pressure valve set too low. Increase setting.
4. Back pressure valve leaks. Repair, clean, or replace.
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