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Power-Flo Pumps & Systems • 877-24PUMPS • www.powerflopumps.com

           

Risk of electric shock. Always disconnect the pump from the power source before handling inspections or repairs.

Symptom

Possible Cause(s)

Corrective Action

Pump will not run or pump fluid

1.   Poor electrical connection, blown fuse, tripped 

  breaker or other interruption of power; 

  improper power supply

2.   Defective motor

3.   Insufficient liquid level

13. Debris plugging screen and suction intake

1.   Check all electrical connections for security. 

  Have electrician measure current in motor leads, 

  if current is within ± 20% of locked rotor Amps, 

  impeller is probably locked. If current is 0, 

  overload  may be tripped. Remove power, allow 

  pump to cool, then re-check current.

2.  Check winding insulation (Megger Test) and 

  winding resistance. If check is outside of range, 

  dry and re-check. If still defective, replace per 

  service instructions.

3.  Make sure liquid level is above the pump

4.  Re-check all sizing calculations to determine 

  proper pump size.

5.  Check discharge line for restrictions, including 

  ice if line passes through or into cold areas.

6.   Remove and examine check valve for proper 

  installation and freedom of operation

7.  Open valve

8.  Check impeller for freedom of operation, 

  security and condition. Clean impeller cavity 

  and inlet of any obstruction

9.  Loosen union slightly to allow trapped air to 

  escape.

10. Repair fixtures as required to eliminate leakage

11. Check pump temperature limits and fluid 

  temperature

12. Replace portion of discharge pipe with flexible 

  connector or tighten existing piping.

13. Check screen and/or suction inlet.

Pump hums but doesn’t run

1.  Incorrect low voltage

8.  Impeller jammed or loose on shaft, or inlet 

  plugged

Pump delivers insufficient capacity

1.  Incorrect low voltage

4.  Ecessive inflow or pump not properly sized for 

  application

5.  Discharge restricted

6.  Check valve partially closed or installed backwards

7.   Shut-off valve closed

8.  Impeller jammed or loose on shaft, or inlet 

  plugged

9.  Pump may be air locked causing pump not to flow

10. Piping fixtures leaking or discharge before the 

  nozzle

13. Suction restricted

Pump shuts off and turns on independent of 

switch, (trips thermal overload protector). 

CAUTION!

 Pump may start unexpectedly. 

Disconnect power supply.

1.  Incorrect low voltage

4.  Ecessive inflow or pump not properly sized for 

  application

8.  Impeller jammed or loose on shaft, or inlet 

  plugged

11. Excessive water temperature

Pump operates noisily or vibrates excessively

2.  Worn bearings, motor shaft bent

8.  Debris in impeller cavity or broken impeller

12. Piping attachments to building structure too 

  loose or rigid

NOTE: 

 Power-Flo Pumps & Systems assumes no responsibility for damage or injury due to disassembly in the field. Disassembly of the pumps or supplied 

accessories other than at Power-Flo Pumps & Systems or its authorized service centers, automatically voids warranty.

Trouble Shooting Chart

PFU31, PFU51, PFU71, PFU102, PFU152, PFU202 

     Submersible Fountain Pumps

Summary of Contents for PFU102 Series

Page 1: ...877 24PUMPS www powerflopumps com ISP No PFU_b 1 2021 INSTALLATION SERVICE PARTS MANUAL Series PFU31 PFU51 PFU71 PFU102 PFU152 PFU202 1 3 1 2 3 4 1 1 1 2 2HP 3450 RPM 60 Hz Submersible Fountain Pumps...

Page 2: ...ye protection when working on pumps Do not wear loose clothing that may become entangled in moving parts Pumps build up heat and pressure during operation Allow time for pumps to cool before handling...

Page 3: ...ical Carbon Ceramic Buna N POWER CORD 12 Ft MOTOR END BEARING Single Row Ball Oil Lubricated PUMP END BEARING Single Row Ball Oil Lubricated MOTOR Oil Filled Squirrel Cage Induction NEMA B Design Clas...

Page 4: ...4 Power Flo Pumps Systems 877 24PUMPS www powerflopumps com Dimensions Performance PFU31 PFU51 PFU71 PFU102 Submersible Fountain Pumps...

Page 5: ...ricated PUMP END BEARING Single Row Ball Oil Lubricated MOTOR Oil Filled Squirrel Cage Induction NEMA B Design Class H Insulation SINGLE PHASE Permanent Split Capacitor PSC Includes Overload Protectio...

Page 6: ...6 Power Flo Pumps Systems 877 24PUMPS www powerflopumps com Dimensions Performance PFU152 PFU202 Submersible Fountain Pumps...

Page 7: ...tomatic overload protector and does not require a control box Connect the white and black wires of the motor lead to the two line leads from the power source fused disconnect switch or breaker box Con...

Page 8: ...ump on it s end remove pipe plug 32 from housing tube 27 Check oil for contamination using an oil tester with a range to 30 Kilovolts breakdown If oil is found to be clean and uncontaminated measuring...

Page 9: ...nding the capacitor by placing a screwdriver across both terminals and then removing screwdriver Connect Ohm meter set on high scale to terminals If needle moves to in nity then drifts back the capaci...

Page 10: ...riction ring into housing end piece 19 Apply pipe sealant to gland nut 17 screw into end piece and torque gland nut to 17 5 ft lbs to prevent water leakage Service For Repair Part Please supply Model...

Page 11: ...pair Parts Bearing Design For Repair Part Please supply Model Number and MFG Date as shown on Name Plate and Part Description and Part Number as shown on Parts List Figure 4 PFU31 PFU51 PFU71 PFU102 P...

Page 12: ...0 Stainless 21 10 Lockwasher 1 4 22 2 Pump support PF023316 PF023316 PF023316 PF023316 23 2 O ring Buna N PF016068 PF016068 PF016068 PF016068 24 2 Terminal Connector Plastic PF079318 PF079318 PF079318...

Page 13: ...ockwasher 1 4 22 2 Pump support PF61PFU1503 PF61PFU1503 23 2 O ring Buna N 156 ID x 3 5mm PF63PFU1501 PF63PFU1501 24 2 Terminal Connector Plastic PF079318 PF079318 25 1 Capacitor bracket Steel PF03985...

Page 14: ...ply Model Number and MFG Date as shown on Name Plate and Part Description and Part Number as shown on Parts List Repair Parts Sleeve Design For Repair Part Please supply Model Number and MFG Date as s...

Page 15: ...dings are defective the complete motor must be replaced To test the overload check the continuity between the black and white wires Assemble bearing sleeve 9 onto motor 10 locating overload as noted o...

Page 16: ...m Repair Parts Sleeve Design For Repair Part Please supply Model Number and MFG Date as shown on Name Plate and Part Description and Part Number as shown on Parts List Figure 4 For Units previous to J...

Page 17: ...F086039 19 1 Housing end Brass PF026850 PF026850 PF026850 PF026850 20 10 Hex nut 1 4 20 Stainless 21 10 Lockwasher 1 4 22 2 Pump support PF023316 PF023316 PF023316 PF023316 23 2 O ring Buna N PF016068...

Page 18: ...quired to eliminate leakage 11 Check pump temperature limits and fluid temperature 12 Replace portion of discharge pipe with flexible connector or tighten existing piping 13 Check screen and or suctio...

Page 19: ...19 Power Flo Pumps Systems 877 24PUMPS www powerflopumps com PFU31 PFU51 PFU71 PFU102 PFU152 PFU202 Submersible Fountain Pumps Notes...

Page 20: ...accordance with Manufacturer s installation instructions that has been exposed to outside substances including but not limited to the following sand gravel cement mud tar hydrocarbons hydrocarbonderi...

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