Intelliflo 2 VST

Rocket11

New member
Sep 8, 2020
3
Brea
My pump shows over current error. I have rest to factory setting. still get error f90066 and
f90059 . Checked voltage and all electrical connections. No leaks, impeller and motor turns freely. Called Pentair, they said I would have to change the drive unit. Do I really have to change the drive unit?

Thanks
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
19,178
Bedford, TX
11,

Tell me how you tested the voltage.. Did you test between L1 and L2 or did you test L1 to ground and then L2 to ground???

Thanks,

Jim R.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
19,178
Bedford, TX
Ali,

With the pump installed, even if you are missing either L1 or L2, you will still get a reading of 120 between L1 and gnd and L2 to gnd.. When the pump is installed, you MUST measure L1 to L2 and read 240 volts.. I'd try that.. If you get 240 volts, then at least you have eliminated the input power as the problem.

If you have 240 volts into the pump and you can easily manually turn the motor, then your only choice is a new controller or a whole new pump/motor...

Thanks,

Jim R.
 

Rocket11

New member
Sep 8, 2020
3
Brea
My pump shows over current error. I have rest to factory setting. still get error f90066 and
f90059 . Checked voltage and all electrical connections. No leaks, impeller and motor turns freely. Called Pentair, they said I would have to change the drive unit. Do I really have to change the drive unit?

Thanks
Ali,

With the pump installed, even if you are missing either L1 or L2, you will still get a reading of 120 between L1 and gnd and L2 to gnd.. When the pump is installed, you MUST measure L1 to L2 and read 240 volts.. I'd try that.. If you get 240 volts, then at least you have eliminated the input power as the problem.

If you have 240 volts into the pump and you can easily manually turn the motor, then your only choice is a new controller or a whole new pump/motor...

Thanks,

Jim R.
Jim, I am away from my location. Will check and let you know. I was wondering if the motor could be wired with suitable capacitor to make it simple motor without the electronic drive. I saw a YouTube link where someone dug into the electronics and determined the frequency modulator was bad. Apparently the modulator is bonded to the metal housing with conductive epoxy. If the thermal bonding is lost the modulator heats up and fails. I hate to spend another $1200 on something that last only 3 yrs. My old pump still worked after 35 yrs.

Thanks again
Ali
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
33,058
Laughlin, NV
Ali -- you live in California. Regardless, you can only purchase a VS pump or a dual speed pump with electronic control. Title 20, California Law.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
19,178
Bedford, TX
Ali,

Let's not jump the gun... until you confirm the voltage..

A VS pump is not at all like a normal single speed pump, so you can't just hook it up and have it run..

Thanks,

Jim R.