Service manual
Electrical Service Manual V4.0
7
7-1
TRIO CONTROLLER
TRIO CONTROLLER - V.2
The Trio controller was the first controller manufactured by P&G Drives of the UK that we
used in our machines. This controller is identifiable by the l”ime green” colored circuit
board that it is built on. This Trio controller with the “lime green” circuit board is called the
V.2.
The V.2 controller was used from September 2002 until March 2004 across our full line and
was used on the 390/420 line of machines until June of 2007.
The V.2 controllers did not have on board protection of the auxiliary circuits so in the event
of an overload the controller could be damaged. To alleviate this electronic circuit breakers
were added to the wiring harness to protect the controller in the event of an overload.
The V.2 controller’s high amp connections; Brush, Vacuum & Traction, could become cor-
roded due to contamination or physical wear of the contacts. If this was to occur the
contacts could develop excessive resistance leading to the plugs and the controller case
to melt. This condition is remedied by replacing the controller and the end of the wiring
harness that plug into the High Amp outputs. There are 2 kits, 250W for walk behinds and
250R for riders. These kits include 3 new high amp plugs and the connectors required
to install them. Note that the new connectors are pre loaded with contact grease. This
grease helps to seal the connectors from contaminants and lubricate the terminals to help
alleviate physical abrasion of them from normal use.
One of the strengths of the V.2 controller is its ability to clime a ramp. That is why we con-
tinued in production with it on out large frame 390/420 machines until May of 2007.
THE V.2 Controller has a “LIME GREEN” circuit board.