Sun,
Just to be sure.. The IC40 will get no power in the Service Mode...
Assuming your IC40 is wired correctly, for it to power on the EasyTouch needs to be in Auto, and either the Pool mode or Spa mode... And... the pump is running or at least being told to run.
Once that happens, the Pump/Filter relay will close, sending power to the SWCG's transformer.
If everything is set up correctly, and the IC40 is not on, then the first thing to do is see of you have about 24 Volts AC between the two red AC inputs on the "surge card" which is the power supply for the cell.
See the pic below..
You don't have a fuse, but you should have a small circuit breaker in the upper right side of the Enclosure..
If you have no 24 VAC, at the Surge card then you need to check the circuit breaker and test the input AC going to the SWCG transformer. It can be either 120 or 240 VAC, depending on how it is wired.
The AC power to the SWCG transformer comes from the Pump/Filter relay and it could be bad..
Let us know what you find.
Thanks,
Jim R.