October 2008 "3072ES / 3772ES / 3772ES HD" Service & Parts Manual
Page 4-4
ELECTRICAL SYSTEM TROUBLESHOOTING
The electronic control system used on the 3072ES and 3772ES is designed for very low mainte-
nance and long trouble free operation. All wire harness plug connections are waterproof to avoid
moisture related problems that can lead to short terminal life. The system consists of three electronic
microprocessor controlled modules; the Matrix Module, P600 Motor Control Module and the GP400
Processor. The modules communicate through low voltage digital signal technology called CAN bus
communication.
The modules are protected against short circuit and reverse polarity to protect against part failure or
incorrect plug connections.
NEVER ATTEMPT TO SUPPLY BATTERY POWER, OR VOLTAGE HIGHER THAN
12 VOLTS TO ANY PART OR MODULE IN THIS SYSTEM, CATASTROPHIC FAILURE
OF THE MODULES MAY RESULT.
USE OF HIGH PRESSURE WASHING EQUIPMENT IN THE VICINITY OF THE
MODULES CAN CAUSE THE SYSTEM TO STOP OPERATING AND IS HIGHLY
DISCOURAGED.
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