I am absolutely amazed! This is an 1$ repair (the cost of the capacitors) and works. My model is an Irritrol Junior Max, 8 zones + master valve, 2003 model, and I bought it in 2005, as I remember. This spring the controller failed to work with 24V error. Now is working again. Marian, thank you!
Hi everybody.
I had the problem with blinking 24V indication too. The fix is quite easy - change all 3 electrolytic capacitors:
C8 - 470M/16V 85 °C -> 470M/16V 105 °C
C7 - 220M/50V 85 °C -> 220M/63V 105 °C
C9 - 100M/16V 85 °C -> 100M/16V 105 °C
All of them are undervalued from temperature point of view and one also from voltage point of view. I have already repaired lot of them (>30pcs) with 100% success. The affected models are mainly Irritrol Junior MAX * and sometimes also Toro DD *. Do not change resistors or zener diodes, it may cause another problems.
Marian