Well. There we were. Unplugged from the national grid.
The place: Te Aroha NZMCA – That’s the New Zealand Motor Caravan Association for the no-movanner, or caravan muggle population.
The time: Very early – like I mean before sparrows-fart early.
The outside temperature: Quite chilly actually – definitely less than absolute zero – bloody cold.
From beneath the covers movement is detected.
Mr N: It’s a bit chilly in here Mrs N, is the heater working?
Mrs N. bravely brushes aside the bedcovers and the icicles hanging from the caravan ceiling, and crunches across a fresh sheet of ice covering the floor; a total distance of 1.9 metres or 6.2335958 bare feet and inspects the Truma control panel.
Mrs N: It’s got an error code – E-507H.
Mr N: Oh no! Not error code E-507-H! What fluffaduck does that even mean?!
With unflappable dexterity and a few deft turns and clicks of the wheel Mrs N. clears the offending code resetting the controller.
We hear the reassuring click, click of the boiler as it attempts to relight. We hear the comforting woosh of the gas igniting – for well – all of about five seconds. Mrs N. not deterred and still standing on the sheet ice floor; (no loose fit carpets for us thank you) attempts to clear the error code and re-start the boiler.
Nope. Nada. Not a sausage. E-507H immediately flashes before her on the screen. Several more attempts to clear the error prove futile.
It was around this time that Mr. N. was busy rummaging in the drawer to find the instruction manual for the caravan. Of which, there seem to be many and several. He finally finds one that looks hopeful, and in his early morning stupor, tries to find the offending error code in the list.
Mr N: Sez here – that E507-H means the gas bottle is empty.
However, all is not as it seems, as quick glance shows that the fridge is still working quite happily (and we all know how temperamental caravan fridges can be – don’t we dear movanners) and when the gas hob on the stove is tried, it lights.
The temperature within the caravan is now colder than a Antarctic toilet seat on the shady part of an iceberg. Mr N. wonders aloud if maybe the gas bottle has got too cold.
Mr N: I wonder if the gas bottle is too cold.
After several more attempts to clear the error code and relight the boiler it is decided that Mr N. shall take one for the team and go outside and change the gas over to the spare bottle.
Bravely, and with no thought of his own safety or comfort, Mr N. ventures outside breaking ice as he goes, and swaps the gas supply hose over to the spare bottle.
Mr N: That’ll fix it!
It did not.
After several more attempts to start the troublesome truma boiler it stubbornly refuses, accusingly flashing its defiant E 507-H on the controller screen. To compound matters further, both the fridge and the gas hob are more than happy to stay lit.
Meanwhile in another part of the caravan Mrs N. has retreated back under the covers and into the warmth of the bed.
She declares with alacrity:
Mrs N: I shall not get out of bed again until it is fixed!
However, under those said covers, she is not shivering in fear, no! She is hatching a plan! Inter-webs to the rescue! She deftly tippity taps Truma 507-H error into the Inter-tubes and lo! The answer is at hand! The boiler needs a hard reset.
Mr N: Right! I’m going in!
Cushions and seat squabs are tossed aside to reveal the confounded contraption.
The top cover is removed from the boiler to expose its secret inner electronic workings. The circuit board LED flashes – red, red, RED!
And lo! And behold! There are indeed two yellow wires.
Mr N. carefully peeks under the wires: And again, – Lo! And again, behold! Before Mr N’s eyes is a tweeny weeney little hidden button! In fevered anticipation Mr N. offers up a digit.
He presses.
A moment later, red turns to yellow! Release! Green! Can it be so simple?
Yes. Apparently it was.
Returning to the control panel, Mr N. twirls the control knobs expectantly to 21! Press!
A moment later, the recalcitrant boiler clicks into life, the wonderful warming roar of gas combusting with the outside air confirming a successful intervention.
Mr N: It is alive!
Mwa ha ha ha ha ha!
Upon further investigative research, it transpires that once an error code is cleared from the Truma control panel, one must wait FIFTEEN MINUTES before attempting to re-start the boiler. If this MANDATORY time period is not observed, the boiler then goes into full lockout mode, and thus requires a HARD reset as previously aforementioned.
Some ridiculous health and safety thing apparently. Sheesh.
With glorious heat now coming forth from the vents, the thermal crisis has been averted.
Mrs N: Since your up, how about a coffee?
Mr N: Yes dear.
With a graceful wave of his hand, Mr N. flips the switch for the inverter and fires up the Nespresso machine.
Swifty eNZed - Start small. Start Now. 
Happened again this morning – bottle ran out – E507H, but this time we calmly changed bottle, observed 15 min and the boiler relit without so much as a whimper. … but that doesn’t sound so exciting doesn’t it? Tee hee.
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