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Topic: Power Tech Auxillary Input Alarm? (Read 304 times) previous topic - next topic

Power Tech Auxillary Input Alarm?

On our '03 U320 the generator will start and run for about 18 seconds then shut down and the "Low OIL" light flashes. Per the manual, this is an "Auxiliary Input" failure but I can not find what the auxiliary input is. the manual describes it is a normally open sensor and closes on failure. Does anybody know?
Brad & Melanie
2003 U320 3820 1st timer
'97 TJ and/or '85 CJ7

Re: Power Tech Auxillary Input Alarm?

Reply #1 –
I had one come by with those symptoms on a Perkins engine, yes Power Tech used some Perkins but yours may be different. Found the problem to be a water sensor on the fuel filter to the generator. So check to see if you have a sensor wire on the fuel filter bowl.

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Power Tech Auxillary Input Alarm?

Reply #2 –
Thanks Mike, mine is a Kobata and none of the filters have sensors on them but in looking I noticed a  sensor on the coolant reservoir. Not sure if it is a temperature or coolant level sensor. I cut the green wire going to this sensor and it will stay running. I'm going to flush the system and replace this sensor.
Brad & Melanie
2003 U320 3820 1st timer
'97 TJ and/or '85 CJ7

Re: Power Tech Auxillary Input Alarm?

Reply #3 –
It is a coolant level sensor, float style, checking with an ohm meter between 1000-2000 ohms and doesn't make any consistent difference with float position. Foretravel doesn't carry them and referred me directly to Power Tech. Waiting to hear back from them now.
Brad & Melanie
2003 U320 3820 1st timer
'97 TJ and/or '85 CJ7

Re: Power Tech Auxillary Input Alarm?

Reply #4 –

Mine had failed and was disconnected by the previous owner.  i wanted to restore this device and found this one at Amazon:

DC0-110V Liquid Water Level Sensor, Sensor Switch, Male Thread 1/2 NPT 304 Stainless Steel, Suitable for Liquids of Different densities, pressures and temperatures DC0-110V Liquid Water Level Sensor, Sensor Switch, Male Thread 1/2 NPT 304...

It's surprisingly good quality and has worked perfect so far.  Like a lot of pipe fittings I get from China, the threads seem to be a little small and so don't really engage until the fitting is fully seated into the boss.  I did use a good quality pipe thread sealant and it has been leak free so far.  The original float switch was all plastic and did not seem to appreciate being submerged in boiling coolant its whole life.  I believe the original was manufactured by Gems Sensors and it looks the same as the one in my fresh water tank that is supposed to control the fresh water fill valve.

As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI

Re: Power Tech Auxillary Input Alarm?

Reply #5 –
Grainger can be a source for those sensors as well. 
Bill and Joyce, The House2 and Dashboard Pig III
2000 U320 4210 CAI (The House2)
Build # 5733
2019 F150 King Ranch FX4

Re: Power Tech Auxillary Input Alarm?

Reply #6 –
Thanks for the input. I just heard back from power Tech, $235.95 for the switch. Grainger has a switch that looks like it would work for ~$16, Madison M8750. The switch that I took out was a Gems and I believe the number is 177100. Big Bear Instruments had it for $55.51. Even though it was considerably more I went with it. Still saved a bunch over Powewr Tech. 
Brad & Melanie
2003 U320 3820 1st timer
'97 TJ and/or '85 CJ7