New HFS-1 system not working

[blk01s4]

Hi everyone, first post here so be gentle
I purchased an HFS-1 system awhile ago and never had time to install it. This recent holiday I got everything in and it seems to be working in test mode. I tried to following the directions '5 easy steps to set it up' and Im stuck at one part.

It says to activate the system manually (I used the TST jumper to do this) and dial the 'SC' until it reads about 6 bars. .. Awesome, I tried doing that no matter which way I turn the SC dial it reads the same the entire time. What could be causing this not to work correctly? I am seeing the bars move across when its in test mode so this seems pretty simple and I can't see why its not working. Any guesses?

[Richard L]

which version DDS3 is your HFS-1? V8, v8a, v9 or v10.

It is labelled on the top of the junction box

[blk01s4]

I dont recall but, just out of curiosity why would that matter? I'm goin down to the Garage to see what version ..

[blk01s4]

v10 ! ........................................ .....

[Richard L]

OK, great.

Just to recap, verything is working except the gauge reading is not responding to SC adjustment.

What size jet are you using?

[blk01s4]

Originally Posted by Richard L

OK, great.

Just to recap, verything is working except the gauge reading is not responding to SC adjustment.

What size jet are you using?

Correct everything works nothing happens on the gauge when dialing around the SC setting.. I am using dual .7's

[Richard L]

Can you physically blow through the flow sensor and tell me if it registers something.

Also, does the "S" led lights up on the gauge?

[blk01s4]

well its registering something now, you want me to blow thru it still ? Yes the "S" lights up

[Richard L]

I would reversion th wediretcion of flow to help clearing some debris that may be trapped inside the sensor.

You can take it apart and re-assemble it quite easily, follow the instuction below:


1. Undo the 4mm hose.
2. unscrew the 4mm fitting.
3. with a 13mm spanner on one end, avoid spinning the metal tube
4. You should now see the inside of the flow sensor tube.
5. With a 1/4" flat blade screw driver, unscrew the plastic scroll
6. At all time press reasonable hard to avoid slip and distort the scroll.
7. Once out, turn the FCM unside down , the little turnbine should fall out.
8. Clean and examine the inside of the tube, if necessary undo the scroll on the other side.
9. Reinstate the assembly as follows
10 make sure the tube is vertical.
11. Drop in the turbine andf ensure iot is centrally located.
12. Still keeping it vertical, screw in the plastic srcoll untiollit bottoms.
13. Un-wind 1/4-1/2 Turn
14. Shade the sensor, clicking sound means the turbine has clarance as it shuttles back and forth.
15. Blow through it, you shoudl heat the turbine spinning.

Re-asesmble and retest.

[blk01s4]

ok ill do that