[firefly123]

when battery is fully charged i can run my pump at 80 as soon as the voltage drops pump pulsates and i have to turn controller down down to 40 and down again when volts drop again

[Tom White]

Yep, I had that, with a brand new battery too.

Great in the mornings; come the afternoon it messed me about.

I don't use flow controllers anymore; just work with a fast flow.  It's quicker, simpler, cheaper, and doesn't mess you about.

[AuRavelling79]

Yep, I had that, with a brand new battery too.

Great in the mornings; come the afternoon it messed me about.

I don't use flow controllers anymore; just work with a fast flow.  It's quicker, simpler, cheaper, and doesn't mess you about.

Same here.

[[GQC] Tim]

All these problems makes me quite happy I've got a 2007 Digital Varistream, no problems. Still on my first 100psi shureflo as well.

[MATT BATEMAN (OWC)]

Have you tried recalibrating it?

Hold the 'up arrow' button at the same time as the 'return'. This'll put in cal mode. Start off with it at 20, if you carry on with the same issue increase it by increments of 5 until it runs smoothly.

[wpclean]

If you work  without a controller, won't it shorten the life of the pump ?

[DG Cleaning]

If you work  without a controller, won't it shorten the life of the pump ?

I've got a second hand Shurflo, been using it since last August without a controller.
I turn off the water between windows and it's still going strong.
Pumps are fairly cheap anyway but you can buy a diaphram kit if it starts to go and pressure switches are cheap as chips. (not that I've needed either)

[Tom White]

Have you tried recalibrating it?

Hold the 'up arrow' button at the same time as the 'return'. This'll put in cal mode. Start off with it at 20, if you carry on with the same issue increase it by increments of 5 until it runs smoothly.

I don't think this is a recalibration issue; though I've had those as well.  The temperature seems to affect the calibration, but this is a flow controller problem.  My variflow was okay, but my Cleaning Warehouse flow controller used to do this to me (or was it the other way around?).  As a work-around, I'd use two batteries, one in the morning and then swap it for a fresh one in the afternoon.

It was a right pain in the chuffer.

[Ian Sheppard]

when battery is fully charged i can run my pump at 80 as soon as the voltage drops pump pulsates and i have to turn controller down down to 40 and down again when volts drop again

Hmm A controller is acting as a bridge between the pump and battery and draws in in the 100th milli amp range.

The biggest draw of current is the pump.
If a battery is not holding charge it may effect the pump and cause it to pulse in and out of DE. How old and what size is the battery?

Volt drop is another cause of this issue copper does have a resistance factor so do check and replace any damaged or worn cable or connectors. Also keep cable as short as possible as the longer the cable the larger the volt drop down its length.

I do not feel recalibration of the control will help here as it more a power battery issue.

Out of interest how old and what size is the pump?

[Ian Sheppard]

To touch on the point of Temperature and Calibration.

Yes ambient air temp will make a difference as it effects the water Viscosity (cold water flows slower) This effects how quickly the system pressures up and effects hose wall, pump and volume of water at the brush head.

Calibration to a pump allows a controller to know the base operating pressure of a system. In cold weather the water flows slower which effects the system pressure In some cases it may be necessary to recalibrate the control as this base line will have changed.

The controller is deliberately designed to allow it to work with as wide a range of systems and pumps as possible.

[dave0123]

To touch on the point of Temperature and Calibration.

Yes ambient air temp will make a difference as it effects the water Viscosity (cold water flows slower) This effects how quickly the system pressures up and effects hose wall, pump and volume of water at the brush head.

Calibration to a pump allows a controller to know the base operating pressure of a system. In cold weather the water flows slower which effects the system pressure In some cases it may be necessary to recalibrate the control as this base line will have changed.

The controller is deliberately designed to allow it to work with as wide a range of systems and pumps as possible.

Ive noticed this lately due to probably the warm temperatures as when i got the controller and calibrated it was march but very cold weather still. I notice it takes around 4-5 seconds for the pump to start running after opening my tap its not a problem its just used to be straight away i didnt realize it could have been down to the weather getting warmer i forgot 

[shina]

If you dont use a controller and you turn water of between windows i.e by pinching the hose etc then would that not burst the hose connectors?

[GB Window Cleaning]

If you dont use a controller and you turn water of between windows i.e by pinching the hose etc then would that not burst the hose connectors?

No, NOt with the sureflow pumps most use (including me) on here. Plus ive recently discovered there is a "pressure switch" on the underside of the pump! It requires a very small allen key to turun it down and then it cuts out at a lower pressure!  (yes im dead clever me!)