Service manual
Electrical Service Manual V4.0
8
8-1
TRIO PLUS CONTROLLER
TRIO PLUS CONTROLLER - V.3
The Trio Plus controller was put into our production in March of 2004. The Trio Plus control-
ler is called the V.3 Controller and is readily identified buy the Blue circuit board that it is
built on. The V.3 controller replaced all controllers used across our entire line with Central
Command II with the exception of the 390/420 line which still used the V.2 controller.
The V.3 controller was an evolutionary design that made improvements over the very ca-
pable V.2 controller
Improvements
Better circuit protection - The V.3 controller was re engineered with faster response to cur-
rent overload. This meant that when an overload occurred the controller could shut down
the output before there was permanent damage to the controller in most situations.
Additional Relays - Additional relays were added to the circuit board to further protect the
controller and the machine in the event of a controller failure or overload.
Improved Diagnostic codes - The diagnostic code list was expanded allowing the codes to
be more specific in nature aiding in the diagnosis of a problem.
Limitations
With the improvements of the controller there was one limitation that arose with this control-
ler. The new faster acting limiting circuitry worked across the board including on the traction
drive circuit. This meant that the new controller did not climb hills as smoothly as the older
V.2 controller on the very large 390/420 machines. For these machines the V.2 controller
was still used until May of 2007
THE V.2 Controller has a “BLUE” circuit board.