Nortec T-448AC, Operator And Maintenance Manual

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Maintenance
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ELECTRICAL TROUBLESHOOTING
! WARNING !
Maintenance work must be performed by trained service technicians only.
It is the responsibility of the owner of this vehicle to ensure that the services technicians are properly
trained, understand and obey the safety rules and guidelines (ANSI B56).
All service technicians must read and understand the maintenance warning section in this manual.
! WARNING !
Before any maintenance work, park the vehicle on a flat level surface, turn off all switches, remove the
key, lift the wheels off the ground, secure with jack stands of adequate capacity, disconnect charger.
Always wear safety glasses.
Batteries emit highly explosive gases that can be ignited by a spark. Before disconnecting a high
current terminal, turn off all switches, disconnect battery charger and disconnect batteries.
Keep clear from moving parts such as tires, sheaves and motor.
PMC SELF DIAGNOSTIC
If the vehicle has a display, it will give the error codes to help troubleshooting. The PMC also comes
with a status LED, which gives a flashing code to help troubleshooting.
BATTERY VOLTAGE
Make sure batteries are securely connected. Measure voltage b and - terminals. We will call
this value B+ or full battery voltage.
ACCESSORIES NOT WORKING
 Check the fuses on the batteries and the DC/DC converter.
 Check voltage and – terminals on the battery gage; if not B+, check wiring.
 Turn the key switch ON, check voltage between output terminal on the key switch and the -
terminal on the battery gage; if not B+, replace the key switch.
 Check voltage across DC/DC converter output terminals; if not 12-Volt, replace the converter.
 Depress the accessory switch, check voltage across accessory terminals. If not 12-Volt, replace the
switch. If 12-Volt, replace the accessory.
FORWARD ONLY
Check the reverse signal input on the controller.
Switch to reverse and check voltage on the reverse control wire. If not B+, replace the F/R switch.
REVERSE ONLY
Check the forward signal input on the controller.
Switch to forward and check the voltage on the forward control wire. If not B+, replace the F/R switch.