Nti boiler no power all of a sudden

shawn1975

Hi two days ago I lost all power to my trinity nti T150 boiler , I checked the fuse it was good so I replaced the sentry 2100 controller and still nothing , any ideas??

STEVEusaPA

Call a professional? There is an NTI rep on this site, maybe he can get you in touch with the right person.

JakeCK

Don't fire the parts cannon right off the rip. That is a very expensive way to do diagnostics.

Jamie Hall

Time to find out how far you are getting power. It probably wasn't the controller... check your hot feed, check the neutral, and check the ground -- all the way from the fuse or breaker box to the boiler.

Tom_133

Listen to Jamie, start from A and go through B,C,D... then to E. It sounds like this time you skipped a couple steps. That boiler has a few internal fuses, and if I remember correctly the sentry is powered by 24volt, so test transformer and safety loop. But it has been awhile.

Pacholopezr

Sorry for posting on top of an old topic. Something similar is happening to my NTI TI200 boiler. It powers off eventually. I have to cut the power for some minutes, sometimes as long as 10, then turn it on and the boiler goes back on. It is happening more and more often. Many parts have been replaced, including the Sentry 2100 panel. Reading through this post, it looks like going from A to E is the right thing to do. I am not a technician, but I am careful, respectful of electricity and gas, so I think I can use a voltmeter to test step by step. Is there any documentation about how to run this test ? Thanks a lot.

109A_5

Hello @Pacholopezr,

Probably a loose connection, when it heats up it fails. Check for loose connections at X4 with the 120 VAC power turned off. If your unit is intermittently going dead check the voltages at the same colored arrows 120 VAC and 24 VAC when the unit goes dead.

The safest way is actually to use a clip lead to L2 and connected to one of the meter's test probes, test all the other places with the other probe in one hand, your other hand in your pocket and the rest of your body is not touching anything else, and insulated from a concrete floor. (NOT a probe in each hand) You can set up the meter and the clip lead ahead of time with the circuit breaker off.





Also see 18.0 TROUBLESHOOTING in the manual.

Manual;
https://ntiboilers.com/wp-content/uploads/2018/12/Trinity-Ti-IO-Manual-2015-10.pdf

Pacholopezr

Thanks a lot @109A_5 sounds like a great suggestion. I will give it a try and let you know. Really appreciate it.