Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Honeywell random fault lockout

This summer, we converted to gas from oil with a Smith cast iron 5 section HE steam boiler using Powerflame controlled by a Honeywell RM7897A1002 burner control to provide heat and hot water for a 5 story 20 unit building.  Anyone in NYC will know that getting a deciated new gas line service can take 6-12 months.  We applied for the serivce and replace the boiler in May and still do not have a deciated gas service, instead, as an only alterntive, two gas lines from residential meters feed the gas steam boiler.  It was working great during the summer, but we are getting more and more random fault lock-outs from the burner control.

Nov 7: fault code 28 "pilot fault error"

Nov 19: fault code 127 "internal fault"

Dec 10: fault code 1 "purge card fault"

Dec 13 ; fault code 127 "internal fault"

All during the PRE-PURGE cycle.  After a reset, things seem to run normal.  A boiler technician friend seems to think that random faults are due to possible gas surges or drops(still inadequate pressure during high demand),  and to tell the boiler installer to adjust the gas valve on the boiler. 

While what he says make sense, would gas pressure issues cause these kinds of ramdom fault lock-outs?  I would expect to see some sort of fuel supply fault.  Any help would be appreciated.


  • SWEI
    SWEI Member Posts: 7,356
    you might want to

    re-post this in "Strictly Steam" where it will get more of the right kind of eyeballs.
This discussion has been closed.