Hi, have tried the heating with drained boiler. Followed Truma instructions. Won't work on gas so hooked up to electricity. No luck. On Truma troubleshoot it said it could be battery or fuse. Both cab and have batteries fully charged. Only thing I can is in this panel, the second light in from the left, called battery, is blinking yellow. Any ideas folks please? It's due in to Maynooth for few bits anyway, but if it's something obvious that I can fix, I'd like to.
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