Trane Intellipak Trips on Space Pressure Sensor Failure

[thecomp]

I have a Trane Intellipak M-(SSHFC254D), which trips on "Space Pressure Failure."

I'm told it is most likely the transducer, but has anyone found this. Also, what is the 1800 number for Trane tech support.

Thanks..:)

[willf650]

You mean it generates a diagnostic? It shouldn't shut the unit down for that issue. The transmitter is located where the filters are as well as a small selonoid that is tubed in with it. The selonoid equilizes the building pressure to OA pressure to verify the calibatrion of the sensor while the unit is running. It will generate a diagnostic if the if the sensor is failed, if a tubes is fallen off, reading excessive pressure or its OA reference is messed up. ie plugged up, red bird installed upside down and filled with water. (Seen this many times)

[jogas]

You mean it generates a diagnostic? It shouldn't shut the unit down for that issue. The transmitter is located where the filters are as well as a small selonoid that is tubed in with it. The selonoid equilizes the building pressure to OA pressure to verify the calibatrion of the sensor while the unit is running. It will generate a diagnostic if the if the sensor is failed, if a tubes is fallen off, reading excessive pressure or its OA reference is messed up. ie plugged up, red bird installed upside down and filled with water. (Seen this many times)

Should the red disc at the end of the red tube be at the bottom or the top?
I've seen them both ways also, mostly at the top.
I think Kele sells them.
jogas

[thecomp]

I found the red "rainbird" sensor barb fitting broken, but with the help of a co-worker, I epoxyed a new fitting. It was raining at the time of the call. Blowing on the rainbird fitting seemed restricted. I have a new tranducer, but I ordered a new red rainbird. I'll have to find out which position is correct??

I don't know where a filter is or if a could try to blow out the pneumatic tubes. I did trace out all the pneumatic tubing:OK.

Also, the filter acces door was open during heavy rain, so I'm not sure where the water penetrated.

Probably the best approach is to assume the worst case and replace the transducer, solenoid, rainbird and clear all tubing.

I'm new to the Trane Intellipak, but learning fast...sometimes the hard way.

Any more great tips are greatly appreciated.

[willf650]

Should the red disc at the end of the red tube be at the bottom or the top?
I've seen them both ways also, mostly at the top.
I think Kele sells them.
jogas

Red disk is supposed to be at the bottom. If they are at the top they have the possibility to fill with water and ruin the sensor attached to it. Or at the least fill with water so you no longer have a OA reference.

I see more with the disk on the top then on the bottom as well.

[supertek65]

disk goes on bottom so no rain can get in
it is a "red bird"
the instructions say to leave all 50' of tubimg in the unit, do not cut any off,
most guys do so it looks good.
i am a stickler for instructions

[drivewizard]

I used to leave all 50' coiled up and hang it inside unit by bulkhead fitting. The 50" acts as a buffer for pressure pulsations,
If I go to a job where someone didn't do that and pressures are a little erratic, due to high wind gusts, I would take a small piece of porous foam rubber and stick in bulkhead fitting. This seems to dampen the pulsations enuff to allow for a stable signal. It doesn't take much, also works great on magnehelics for filter delta p's, etc.. if they are bouncing all over the place.

[jogas]

Here's the "redbird" PDF from the Kele site:
http://www.kele.com/olcat/P4/a-300_rps_21121_sd-01.pdf
There is also a surge dampener available that I've used before.
jogas

[jayguy]

the reason for the diagnostic is:

The unit is reading a signal that is out
of range for the Space Pressure
transducer input (During calibration:
V < 40 mV or V > 420 mV, During
operational times: V < 40 mV or V >
0.75 V).

check that the sensor is accurate first. this will dermine whether the unit has a problem or the "building" has a problem. i have a building where this diagnostic comes up all day long because they have way too many exhaust fans. the unit will never bring in enough outside air to pressure the building...so it is always shows the diagnostic.

good luck.