10.64 10.64 Electrical Electrical systemsystem
High drive motor teHigh drive motor temperaturemperature
..
Check that the regulator fan works as itCheck that the regulator fan works as it
should by first removing the batteryshould by first removing the battery
plug and then restarting the truckplug and then restarting the truck
again.again.
Does the fan start within about 20Does the fan start within about 20
seconds?seconds?
YYeses
Check that nothing obstructs the airCheck that nothing obstructs the air
flow through the regulator's heatsinks.flow through the regulator's heatsinks.
If the heatsinks are covered in dust orIf the heatsinks are covered in dust or
other objects, clean under these.other objects, clean under these.
NoNo
Connect a voltmeter between X26.1Connect a voltmeter between X26.1
and X26.2 and repeat the procedure toand X26.2 and repeat the procedure to
check the regulator fan.check the regulator fan.
Is the voltage at around B+ 48V for aIs the voltage at around B+ 48V for a
few seconds after you have logged infew seconds after you have logged in
to the truck?to the truck?
YYeses
Change the fan.Change the fan.
NoNo
Check the cables between the fanCheck the cables between the fan
contact X26.1 acontact X26.1 and the And the ATC contactTC contact
XC5.19, X26.2 and XC5.12. carefully.XC5.19, X26.2 and XC5.12. carefully.
If the cables are OK and the truck hasIf the cables are OK and the truck has
no other faults, cno other faults, change the ATC.hange the ATC.
1. W1. Was the warning as the warning text text "High temp"High temp
drive M" visible on the display whendrive M" visible on the display when
the symptom occurred?the symptom occurred?
šš
NoNo
Start using the truck again and ask theStart using the truck again and ask the
truck driver to report any new warningtruck driver to report any new warning
messages.messages.
YYeses
2. Does the machine housing fan2. Does the machine housing fan
work?work?
šš
NoNo
Go to point 4 below.Go to point 4 below.
YYeses
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