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10.64
10.64
Electrical
Electrical system
system
High drive motor te
High drive motor temperature
mperature
..
Check that the regulator fan works as it
Check that the regulator fan works as it
should by first removing the battery
should by first removing the battery
plug and then restarting the truck
plug and then restarting the truck
again.
again.
Does the fan start within about 20
Does the fan start within about 20
seconds?
seconds?
Y
Yes
es
Check that nothing obstructs the air
Check that nothing obstructs the air
flow through the regulator's heatsinks.
flow through the regulator's heatsinks.
If the heatsinks are covered in dust or
If the heatsinks are covered in dust or
other objects, clean under these.
other objects, clean under these.
No
No
Connect a voltmeter between X26.1
Connect a voltmeter between X26.1
and X26.2 and repeat the procedure to
and X26.2 and repeat the procedure to
check the regulator fan.
check the regulator fan.
Is the voltage at around B+ 48V for a
Is the voltage at around B+ 48V for a
few seconds after you have logged in
few seconds after you have logged in
to the truck?
to the truck?
Y
Yes
es
Change the fan.
Change the fan.
No
No
Check the cables between the fan
Check the cables between the fan
contact X26.1 a
contact X26.1 and the A
nd the ATC contact
TC 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 has
If the cables are OK and the truck has
no other faults, c
no other faults, change the ATC.
hange the ATC.
1. W
1. Was the warning
as the warning text
text "High temp
"High temp
drive M" visible on the display when
drive M" visible on the display when
the symptom occurred?
the symptom occurred?
šš
No
No
Start using the truck again and ask the
Start using the truck again and ask the
truck driver to report any new warning
truck driver to report any new warning
messages.
messages.
Y
Yes
es
2. Does the machine housing fan
2. Does the machine housing fan
work?
work?
šš
No
No
Go to point 4 below.
Go to point 4 below.
Y
Yes
es
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