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  1. #1
    Join Date
    Nov 2003
    Location
    Montreal, Qc.
    Posts
    780

    Rudd UGPH-10EAMEA Need Help With Flash Codes

    I have a client with a Rudd UGPH-10EAMEA gas furnace with HSI.
    The thermostat closes and the draft inducer starts. The airflow switch makes but the HSI never glows.
    I unplugged the HSI and it never gets 120V

    There are 3 LED's on the board:
    From left to right there is an amber which I'm assuming is flame which is off.
    The center green is flashing 3 times.
    The right one is on.

    Any help would be appreciated.
    A link to Rudd flash codes would be great.

  2. #2
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,153
    I believe its high limit open

    Does it cycle the blower ?

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,054
    It is. Limit probably stuck open. Tap it and may reset. Replace ASAP but find out why it opened in the first place.

    Sent from my HTC VLE_U using Tapatalk 2

  4. #4
    Join Date
    Nov 2003
    Location
    Montreal, Qc.
    Posts
    780
    The blower is running continuously.
    I never saw the unit fire.
    Ill be going there a bit later.
    Thanks ill update once I've gone.

  5. #5
    Join Date
    Nov 2003
    Location
    Montreal, Qc.
    Posts
    780
    Update:
    There was a bad connector on the high limit.
    Thanks for the help

  6. #6
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    15,918
    Quote Originally Posted by thump_rrr View Post
    Update:
    There was a bad connector on the high limit.
    Thanks for the help
    I had one of those Ruud high limits eat my lunch about two weeks ago, the board keep popping fuses, I looked and looked and looked for the problem, finally found a shorted high limit, replace it and all was well. Heck who would have though of checking any limit to ground, I just usually ohm them out.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  7. #7
    Join Date
    Nov 2003
    Location
    Montreal, Qc.
    Posts
    780
    Quote Originally Posted by Mr Bill View Post
    I had one of those Ruud high limits eat my lunch about two weeks ago, the board keep popping fuses, I looked and looked and looked for the problem, finally found a shorted high limit, replace it and all was well. Heck who would have though of checking any limit to ground, I just usually ohm them out.
    Whenever I can't find some intermittent problem which causes fuses to pop I pull out the Megger.
    You'll be surprised at what I've found to be defective. contactors, airflow switches, transformers, etc.

    PS. Love the last line in your sig Br Bill. ΜΟΛΩΝ ΛΑΒΕ

  8. #8
    Join Date
    Dec 2011
    Location
    Twin Cities Minnesota
    Posts
    237
    Ok..,I'll bite,whats the "Megger"?

  9. #9
    Join Date
    Nov 2003
    Location
    Montreal, Qc.
    Posts
    780
    Megaohmeter.
    Megger is actually a brand name.
    It's an insulation resistance tester.
    You typically test at 2x working voltage to ground.
    An open or OL reading is good while a low mega ohm reading is bad.

    For example I had a duct heater that would intermittently blow main fuses.
    The duct heater resistance was good and no short to ground was found. I disconnected the wires from the contactor and tested every leg and sure enough there was a short which a regular ohm meter wouldn't detect since it didn't have enough voltage for the short to arc across the Bakelite .
    It can also be used for predictive failure of compressors with routine megging of the windings.

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