Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 23

Thread: Noob with Pump problem

  1. Back To Top    #1

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Noob with Pump problem

    Hi All, just purchased my first forclosure. Great house with a great play pool. Everything worked great during inspection and now that I own the place, I have a pump issue. The AO Smith motor will turn on and pump water for about 5 seconds, then it tripps the 15amp breaker. I replaced the breaker in hopes of a failed unit. No go. Still tripps. Not sure that it's a capacitor since it starts. Maybe a short in the wiring? Looks like a ST1202. Should I have the motor checked by a shop? Buy a new motor? Thanks for the help.

    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: Noob with Pump problem

    Check for a clogged impeller.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    Thanks Dave, I will check again. I didn't notice any problems with the impeller when I removed the motor.
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  4. Back To Top    #4

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: Noob with Pump problem

    That your pump starts up fine and then kicks suggests that you are overloading the motor. Debris stuck in the impeller is usually a common cause but it could be other things as well..

    When the motor kicks, can you see what your psi is at the time it pops the breaker?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    Will check and report what I find tomorrow
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  6. Back To Top    #6
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Noob with Pump problem

    Why do you need such a large pump? Is there water features or spa that's not in your sig?

    That pump draws 12 amps normally, so you're already close to what a 15 amp breaker is designed for.

    What is the filter pressure running when it's running?
    Have you removed or changed any eyeballs?
    Have you changed anything to get more flow?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  7. Back To Top    #7

    TFP Guide

    Join Date
    Jun 2012
    Location
    western NY
    Posts
    1,557

    Re: Noob with Pump problem

    What amp breaker is in the box? 2 pole 20 amp? What gage wire? how long of a distance is it from the breaker to the pump?
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

  8. Back To Top    #8
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Noob with Pump problem

    Quote Originally Posted by pielut
    ...then it tripps the 15amp breaker
    That's where I got that the breaker was 15 amp.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  9. Back To Top    #9

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    Right now I have a 2 pole 20 amp breaker and 12 gauge wire, still tripping 20 amp breaker. Electrical panel is on opposite side of pool equipement, so long run. When the pump turns on all is well until pressure starts to build. I reach 3-4 psi and the motor dies. I do have a water fountain. No changes to eyeballs or pressure that I'm aware of.
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  10. Back To Top    #10

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    pic of pool equipement
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  11. Back To Top    #11

    Join Date
    Mar 2012
    Location
    Tampa Bay, Florida
    Posts
    165

    Re: Noob with Pump problem

    Assuming there is no blockage and the impeller spins freely, you might have a bad run capacitor. That is the one that is under the hump on the top of the motor. A bad run capacitor can overload one of the motor windings and make it run hot which will ultimately trip the breaker.

    A run capacitor is one of the easier things to change on this motor and only involves removing 2 screws and the top cover (breaker off!!!). You'll see 2 wires that clip into the capacitor. Any buldging or discoloration of the capacitor would be a clue to a possible bad unit. You would need to read the Uf or MMF reading and voltage on the label and purchase an identical unit. Prices can vary widely and from $35-$40 at a pool store to about $13-$15 at Granger or possibly online. Usually this capacitor is a 30 MMF, 370 volt AO Smith # 628318-308, but you need to confirm that and it doesn't have to be the expensive AO Smith OEM capacitor. Some appliance parts stores carry these too, but just make sure the canister size is about the same as yours so it will fit under the hump cover (and not short out).

    Of course there are no guarantees it is the capacitor, but for $15, it may be worth a gamble. At least that is what I would do.

    EDIT, I found this You Tube Video with more info: http://www.youtube.com/watch?v=k-cVgpz7GYQ
    John (DIYer). Concrete, approximately 13,000 gallon in-ground pool with adjoining concrete spa. Approximately 40 years old. Hayward Super II pump for pool and legacy Anthony Sta-Rite bronze pump CF6 for spa, VA-26 filter,(2 sets), Rheem propane heater for spa. HASA Liquidator for pool.

  12. Back To Top    #12

    TFP Guide

    Join Date
    Jun 2012
    Location
    western NY
    Posts
    1,557

    Re: Noob with Pump problem

    Quote Originally Posted by Bama Rambler
    Quote Originally Posted by pielut
    ...then it tripps the 15amp breaker
    That's where I got that the breaker was 15 amp.

    Yep, my bad. Read the post twice too.
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

  13. Back To Top    #13

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    So I replaced capacitor with a new one and same problem. Motor runs less than
    10 seconds and trips breaker. Before it dies, pressure increases slowly to 3-4 psi, water
    starts to move in the pump and then nothing. Any more ideas?
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  14. Back To Top    #14

    Join Date
    Mar 2012
    Location
    Tampa Bay, Florida
    Posts
    165

    Re: Noob with Pump problem

    Quote Originally Posted by pielut
    So I replaced capacitor with a new one and same problem. Motor runs less than
    10 seconds and trips breaker. Before it dies, pressure increases slowly to 3-4 psi, water
    starts to move in the pump and then nothing. Any more ideas?
    The only other thing I can think of, short of replacing the motor, is a bad start switch on the back of the motor. There is a little white plastic square piece about 1/8" X 1/8" that sometimes breaks off the start switch. This piece rides on the end of the centrifigal switch (dead center to the motor shaft on the back). Once your motor starts, the switch releases that plastic piece and that opens the start switch which cuts the start capacitor and the start winding out of the circuit. I had this happen on one of my motors. If the start switch can't pop open, the motor rapidly over heats and trips the overload or the breaker to protect the motor. If I get time later, I'll show you a picture.
    John (DIYer). Concrete, approximately 13,000 gallon in-ground pool with adjoining concrete spa. Approximately 40 years old. Hayward Super II pump for pool and legacy Anthony Sta-Rite bronze pump CF6 for spa, VA-26 filter,(2 sets), Rheem propane heater for spa. HASA Liquidator for pool.

  15. Back To Top    #15

    Join Date
    Mar 2012
    Location
    Tampa Bay, Florida
    Posts
    165

    Re: Noob with Pump problem

    Adding to my above post.... I found a picture of the back of the motor in a post here on the TFP forum. I'm going to link the picture with the hopes that the OP and mods won't be upset with me (I can always delete). The start switch in this picture may look slightly different than yours, but they wotk the same way. Mounted on the shaft is a centrifigal switch (see the springs). As the motor gains speed from start (in less than 1-2 seconds), that switch opens and removes the starting capacitor (black one in the back) and the start winding from the circuit in normal operation. In your case, it appears that the start switch is not opening as mentioned in my above post. Inspect the switch for anything unusual.


    I probably should mention that this motor is probably getting some age on it. Assuming the windings are good and the problem is just the start switch, you could probably fix it, but keep in mind that the bearings, or even the starting capacitor could go out sometime in the near furure.

    Here is a picture of the old style start switch with the plastic tip (top of switch in this picture) that sometimes breaks off.



    EDIT: I found a great You Tube video that shows the switch in action. Its much better than I can explain:

    http://www.youtube.com/watch?v=LDeCljJDMdg

    Another Edit (sorry if this is information overload ) Check out this E-Bay listing. I have bought from these guys before with no problems:

    http://www.ebay.com/itm/A-O-Smith-motor ... 380wt_1170
    John (DIYer). Concrete, approximately 13,000 gallon in-ground pool with adjoining concrete spa. Approximately 40 years old. Hayward Super II pump for pool and legacy Anthony Sta-Rite bronze pump CF6 for spa, VA-26 filter,(2 sets), Rheem propane heater for spa. HASA Liquidator for pool.

  16. Back To Top    #16

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    Thanks for the info hoosierrun. I tested the motor separate from the pump and it still shuts off after a few seconds.
    I read that pumpwarehouse.com has good prices on new motors. I've tried for two days to reach them. Are they still in business? Can you guys recommend another source for motors. Thanks a bunch.
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  17. Back To Top    #17

    Join Date
    Mar 2012
    Location
    Tampa Bay, Florida
    Posts
    165

    Re: Noob with Pump problem

    Try doing a search on ST1202 motor.
    Amazon is 278.96 + 26.95 and maybe tax in AZ.

    Swim and Save in Tampa has it for 256.99 and they may have a shipping cost (not in my area since they are local). Some things ship for free, but motors are quite heavy so I doubt it.
    John (DIYer). Concrete, approximately 13,000 gallon in-ground pool with adjoining concrete spa. Approximately 40 years old. Hayward Super II pump for pool and legacy Anthony Sta-Rite bronze pump CF6 for spa, VA-26 filter,(2 sets), Rheem propane heater for spa. HASA Liquidator for pool.

  18. Back To Top    #18
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: Noob with Pump problem

    Quote Originally Posted by pielut
    So I replaced capacitor with a new one and same problem. Motor runs less than
    10 seconds and trips breaker. Before it dies, pressure increases slowly to 3-4 psi, water
    starts to move in the pump and then nothing. Any more ideas?
    Did you replace the run capacitor or the start capacitor?

    If you do replace the motor, I would recommend getting a 2-speed. The a.o. smith B2979 or B979 would be a good choice. Here is a well priced one: http://www.poolsupplyworld.com/Centu...30V/B2979.htm#
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  19. Back To Top    #19

    Join Date
    Oct 2013
    Location
    Glendale, Az
    Posts
    8

    Re: Noob with Pump problem

    I replaced the run capacitor. I purchased a new motor from pumpwarehouse. I plan on fixing the old motor and keep as a back-up. Is that 2 speed motor a direct bolt-on replacement? No mods to the pump?
    IG Pebble, 2HP Hayward, SWG, Hayward DE filter, water fountain.

  20. Back To Top    #20
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: Noob with Pump problem

    Quote Originally Posted by pielut
    Is that 2 speed motor a direct bolt-on replacement? No mods to the pump?
    Yes
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •