Goobie
Expert Member
I wanted a place to archive this info as I believe it might help somebody else one day.
So my geyserwise unit is old, dating from 2007 it was probably one of the first ones made. With all the load shedding of late I first noticed that the unit's time was completely wrong when power came back on, then eventually the clock would only display 46:00 when power was restored. I opened it up and thought that the internal battery that kept the clock working ran down and replaced it only to discover that it is NOT a battery but a supercapacitor (5.5V, 1F). Replaced it but it did not fix the problem. It turns out that you need to replace IC4 as it is responsible for keeping the clock and calender running.
The IC is PCF8563P and the stock code from Mantech is: 35M4070. Price was R50 (2019)
Hope this turns out useful to somebody else as well
So my geyserwise unit is old, dating from 2007 it was probably one of the first ones made. With all the load shedding of late I first noticed that the unit's time was completely wrong when power came back on, then eventually the clock would only display 46:00 when power was restored. I opened it up and thought that the internal battery that kept the clock working ran down and replaced it only to discover that it is NOT a battery but a supercapacitor (5.5V, 1F). Replaced it but it did not fix the problem. It turns out that you need to replace IC4 as it is responsible for keeping the clock and calender running.
The IC is PCF8563P and the stock code from Mantech is: 35M4070. Price was R50 (2019)
Hope this turns out useful to somebody else as well
