Serious problem on AK200. During desinfections, temperature on bargraph remains at 28-30 deg. Celsius.All fuses are good. I checked all connections of heater. But i remarked that there's 0 volt at the outlet of the relay supplying the heater even when we have 220v at the inlet. So i replaced the relay unit. But same situation.
Any help and suggestions ?
I've checked the two 10A fuses on the power supply unit just at rear of the machine. Also the two fuses on the relay unit.
The temperature stayed at 28-30°C. The heater elements seemed to be good (about 60 Ohms).
I'm assuming the ambient water temperature in your clinic in Togo is 30 degrees?
If all the thermistors are reading correctly there should be a control signal sent to the heater relay to switch the heaters on, if I remember correctly this is directly from the FM board to the heater relay board and is a four pin cable. Check this is connected. Also check the fuses in the PSU and on the relay board, I think both live and neutral are fused.
It's been a while since I worked on these, can you post or email me a picture of the relay board?
in the past there has been a few thing that can cause this:-
hanson connectors not firmly connected
Tube off FOP, ZEVA, CH 1 input UFcell
over temperature sensors have tripped
heating vessel is showing medium when it is empty (use GXL to check) this can be a faulty level detector in the heating vessell
I have tried everything. Maybe a problem on the FM CPU board. I would like to replace this board, but I don't have a typical one. I took one of another machine but i get the error Srb on the panel. Surely a problem of compatibility.