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TT solo110

solo 110 set in operation 11/08

Worked fine: radiant and indirect dhw augment to solar storage tank.

Got E 04 (power loss after hard lockout) blinking on display. Both pumps running which is normal for the mcba on hard lockout (have seen this with weil mclain also).

Cannot clear e04 code. pressed reset, mode and reset, no result.

Have disconnected flat connector from display to mcba when the u128 shows on screen on display board (before the e04 code flashes)to try and get mcba to operate - no change'

Any help here?


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