Truma Combi Boiler Fault No.45 SSLSLLSL

Reesie
Reesie Forum Participant Posts: 1
edited February 2018 in Parts & Accessories #1

My gas bottle ran out while the heating was on and we didn't have electric hook up. We changed the bottle but the red fault light behind the control knob comes on. Gas is getting through from the new bottle because the cooker, fridge & bbq point all work. When we got home the boiler works fine on electric but not gas. I've done some research and have established that I have a Flashing Error Code No.45. I,ve checked the 12v 10amp fuse and the 230v 10amp fuse and both are oaky. I've also pressed the over heat reset switch although it didn't appear tripped. I think it is a fault with one of the PCB,s as when on hook up and set to gas the electric heating works, not the gas. Unplug the hook-up and the gas fault occurs. Any one got any ideas as to what the fault might be please as I am snookered and daren't go away without the heating working properly until summer. Thanks

Comments

  • Richard M
    Richard M Forum Participant Posts: 41
    edited February 2018 #2

    Best contact Truma help desk as this sounds like some software crash and a reboot if possible is requiered

  • young thomas
    young thomas Forum Participant Posts: 11,356
    1000 Comments
    edited February 2018 #3

    OK, just had a look at the flash codes and this is the Truma detail...

    45 s,s,l,s,l,l,s,l

    Error....No 230 V supply to Combi E

    Error description....230 V power supply failure

    1st action.....Check 230 V voltage

    2nd action...Water temperature switch reset / check 230 V

    so, when running on gas I wouldn't expect a 230v supply, however I would expect a potential error of the 12v supply (for fan and PCB) was very low.....coincidental with change of bottle?......perhaps

    also when ehu plugged in, works ok....this may be replenishing 12v supply......pull cable out and fault reoccurs.....

    im wondering two things.....

    1) have you got the error flash code right? Could it be code 44 sslsllss (just one blink different in 8th position) which is 12v supply less than 10.5v....this fits with my flat leisure battery thoughts above....

    2) you have a flat (defective) leisure battery....you were off grid (no ehu) for how long? Any solar panel to keep things well charged?

    Get your battery tested or try and borrow a known good leisure battery and try the gas heating again...

    good luck.

  • young thomas
    young thomas Forum Participant Posts: 11,356
    1000 Comments
    edited March 2018 #4

    Just to add to the above....

    did you have any other 'low 12v' symptoms, like dimming lights, slow water pump etc....

    i was thinking that you might have blown a leisure battery fuse but you would have lost lights etc....

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