vokera linea 28

[jeff howe]

when using hot water boiler runs for 30 secs then trips out on 07 code if i reset and turn up c/h thermostat to fire up boiler then turn on h/w will keep running ok turn down the c/h thermostat h/w runs fine if i turn water of then back on trips on code 07 again can anybody help

 

[Agile]

Perhaps you have the book on this boiler and can advise what code 07 relates to?

Without that information I would look at two things, the resistance of the DHW temperature sensor and the temperature differential across the plate heat exchanger in DHW mode, that should not exceed about 30*C unless the pump speed is low or the HE is blocked.

Tony Glazier