Hi all, I'm having this same problem. I thought my 2 speed pump went bad since it wouldn't turn on at all (only a hum). Replaced both capacitors and it still didn't work, so I bought another pump. I just installed it and now it kicks on low, but when I change it to high, the low speed jets stay on, but then I just hear a hum. Any ideas? It's a Sundance Optima 850 if that helps.
2-Speed pump not working
- Thread starter gdamato
- Start date
- Jul 21, 2013
- 65,132
- Pool Size
- 35000
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- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
swamprat69
Well-known member
Your spa seems to have a date code indicating 2002. Sundance only seems to provide manuals back to 2011. Without wiring diagram it is difficult to tell what is going on. One might assume that pump speeds are controlled through relays. First thing that I would do is confirm correct voltage to pump through relays. Wiring diagram would be very helpful.
It looks like this might be it... it's a 2002 Sundance Optima 850
www.manualsdir.com
Sundance Spas 850 - Manual (Page 46)
Sundance Spas 850 User Manual • Original mode • 0 electrical wiring diagram (60 hz), Page 42 • Sundance Spas Kitchen
Possibly a stuck relay.
Check the voltage going to the motor to see if both windings are being powered at the same time.
Check the voltage going to the motor to see if both windings are being powered at the same time.
drsipe
Gold Supporter
- Jul 24, 2020
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- 24500
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- Chlorine
- Salt Water Generator
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- CircuPool RJ-60 Plus
Just as a wild guess,,,,, can you check your breaker with a multimerer across the two hot wires, you should have 220v, one hot to neutral /ground should be 110v, and the other hot to neutral/ground should be 110v. This may be a bad breaker, again just a guess.
Can you show the wiring connections to the motor?
Are you sure that it is wired correctly?
During low speed operation, there should be 230 volts between L and C.
During high speed operation, there should be 230 volts between H and C.
You can disconnect the wires from the motor to test this, but this is very dangerous if you are not very experienced with testing voltages in an area with live power.
Do not do anything unless you are sure that you know exactly what you are doing.
Are you sure that it is wired correctly?
During low speed operation, there should be 230 volts between L and C.
During high speed operation, there should be 230 volts between H and C.
You can disconnect the wires from the motor to test this, but this is very dangerous if you are not very experienced with testing voltages in an area with live power.
Do not do anything unless you are sure that you know exactly what you are doing.
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swamprat69
Well-known member
Looks like with a little digging I came up with your manual https://www.thespaworks.com/sites/default/files/2002_sundance_850_series_owners_manual.pdf Wiring diangram is on page 42. Looks like pump# 1 ( 2 spd ) is powered from relays above TB1 connector. LO spd is powered (1) to (3) on TB1. HI spd is powered (1) to (5) on TB1. Check voltages to pump through relays on both speeds at TB1.
swamprat69
Well-known member
To check if both speeds are powered at the same time, disconnect the wires #1, #3 and #5 at TB1. On LO spd you should have 240V between #1 and #3 and 0V between #1 and #5 on TB1. On HI spd you should have 0V between #1 and #3 and 240V between #1 and #5 on TB1.
swamprat69
Well-known member
As James mentioned, do not troubleshoot electrical unless you are both 100% comfortable and safe in doing so.
I just tested the TB and got 240v when on low between #1 & #3 and 240v between #1 & #5 when on high. If it matters, I think I was getting like 20v or something when testing 1/3 on high and 1/5 on low, not zero volts. While we continue troubleshooting, how the heck do I get the wires back in the TB? These white tabs don't seem to do anything and I don't want to be too forceful and break it...
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Ok, I got the wires back in the TB. I disconnected the wires from the pump and did the same test and it tested fine, so the pump is getting the correct voltage... any other ideas?
Brand new or used?
If it is new, it should work.
I suspect that you are testing the voltage incorrectly.
Disconnect the low speed wire and see if high speed works.
Check the voltage on the low speed wire to ground when high speed is on.
swamprat69
Well-known member
Small amount of voltage seen when checking would be due to back EMF in unpowered winding.
1 is Common, 3 is Low and 5 is High.
1 is powered on high or low, so you will get some voltage when testing from 1 to anything.
You should get 230 volts from # 1 to # 3 on low and 0 volts from # 1 to # 5.
You should get 230 volts from # 1 to # 5 on high and 0 volts from # 1 to # 3.
1 should be White to Common.
3 Should be Black to Low.
5 should be Red to High.
It looks like you have Black and White reversed?
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I know for sure I have the black wire in the middle on my pump, so I bet you’re right that I have the black and white wires reversed… I’ll try to switch them when I’m back home later this evening. Thank you all for your help, it is very much appreciated!
