Maintenance; Safety; Cleaning - prime mover smx45 Master Service Manual

F-code Section
PT S5.7
Transistor Controller
Version no T-code
001 SMX
244
Return
C-code
5460
Thermal Cutback. Thermal cutback of the transistor
controller is below -13 degrees F (-25 degrees C) or above
185 to 203 degrees F (85 to 95 degrees C), the PWM drive
current limit is linearly decreased from full set current down to
zero. At -13 to -40 degrees F (-25 to -40 degrees C), the
current limit is reduced to approximately half the set current,
resulting in reduced travel speed. Below -40 degrees F (-40
degrees C) or above 203 degrees F (95 degrees C), the
allowed PWM is zero percent.

2. Maintenance

There are no serviceable parts inside the transistor controller.
No attempt should be made to open the transistor controller.
OPENING THE TRANSISTOR CONTROLLER WILL VOID
THE WARRANTY!

2.1. Safety

WARNING
The transistor controller is essentially a high-power device.
When working around any battery powered vehicle, proper
safety precautions should be taken. These include, but are
not limited to the following: proper training, wearing eye
protection, avoiding loose clothing, removing watches and
jewelry, and using insulated tools.

2.2. Cleaning

It is recommended that the transistor controller exterior be
cleaned periodically with an approved and regulated air
supply (blower.) Although the transistor controller virtually
requires no maintenance if properly installed, the following is
recommended on a regular basis of 250 hours for cold
storage and 1500 hours for standard environment.
1. Remove power by disconnecting the battery at the
battery connector.
2. Discharge capacitors in the transistor controller by
connecting a load (such as a contactor coil or horn)
across the transistor controller's B+ and B-
Master Service Manual
Because there is a risk of short circuits,
remove all watches and jewelry; always use
insulated tools.
2006-12-12