- Jun 29, 2013
- 17
Hello and thanks in advance for any help!
I have a Hayward pro logic pool pump controller. It has a controller that has buttons to turn the filter on (220v), pool lights, and two AUX switches
The display with the buttons is some sort of micro controller that connects to the main board. There are several small relays on the main board. Coming off of the main board are 8 wires that go to 4 independent large relays. These large relays have a 24 vdc coil and are what activate to turn the pool pump, lights, and two AUX devices on.
All 4 relays are receiving 24vdc all the time. As soon as the controller is powered up 24vdc is going through to the large relays and activating them. Making my pump, lights, etc. ON all the time.
I am assuming some of the small relays on the board are supposed to be activated by the button press on the display screen. Then, they activate the coil of the bigger relay? Does that sound logical?
The button presses seem to be working properly as you can hear an audible beep when they are pressed and the display reads “pool lights on” etc.
After doing a little research, I have identified two of the chips near all the small relays as mic5841YN. These are apparently relay driver chips. I found this spec sheet:
ww1.microchip.com 11
I am not sure how to test them though…. Or even if I am headed in the right direction. Has anyone else had issues with these chips?
Again, thanks for any help!
I have a Hayward pro logic pool pump controller. It has a controller that has buttons to turn the filter on (220v), pool lights, and two AUX switches
The display with the buttons is some sort of micro controller that connects to the main board. There are several small relays on the main board. Coming off of the main board are 8 wires that go to 4 independent large relays. These large relays have a 24 vdc coil and are what activate to turn the pool pump, lights, and two AUX devices on.
All 4 relays are receiving 24vdc all the time. As soon as the controller is powered up 24vdc is going through to the large relays and activating them. Making my pump, lights, etc. ON all the time.
I am assuming some of the small relays on the board are supposed to be activated by the button press on the display screen. Then, they activate the coil of the bigger relay? Does that sound logical?
The button presses seem to be working properly as you can hear an audible beep when they are pressed and the display reads “pool lights on” etc.
After doing a little research, I have identified two of the chips near all the small relays as mic5841YN. These are apparently relay driver chips. I found this spec sheet:
ww1.microchip.com 11
mic5841.pdf 1
163.60 KBI am not sure how to test them though…. Or even if I am headed in the right direction. Has anyone else had issues with these chips?
Again, thanks for any help!