10.78 10.78 Electrical Electrical systemsystem
Important!Important!
For UFS trucks this errFor UFS trucks this error may be due to the malfunction of the or may be due to the malfunction of the “S46” switch.“S46” switch.
The switch must be closed iThe switch must be closed in order for the reach out movement to work. Thisn order for the reach out movement to work. This
can be checked under the hydraulic inputs can be checked under the hydraulic inputs in the service menu, where “Rin the service menu, where “RO” isO” is
displayed if the switch is cdisplayed if the switch is closed. A UFS truck drops down to creep speed and alosed. A UFS truck drops down to creep speed and a
tortoise is displayed if the switch is faulty.tortoise is displayed if the switch is faulty.
1. Does the pump rotate?1. Does the pump rotate?
YYeses
Go to point 4.Go to point 4.
NoNo
2. Does “E” = reach out, show when2. Does “E” = reach out, show when
the joystick is activated in the menuthe joystick is activated in the menu
hydraulic inputs?hydraulic inputs?
šš
NoNo
Check the control cable for the reachCheck the control cable for the reach
joystick and joystick and the joystick. the joystick. If the jIf the joystickoystick
is not working it should be replacedis not working it should be replaced
and calibrated.and calibrated.
YYeses
3. Check that the level f3. Check that the level for the reach outor the reach out
has not been accidentally set to 0.has not been accidentally set to 0.
4. B+ 48V valve block connector4. B+ 48V valve block connector
P71.1?P71.1?
šš
NoNo
Change the valve block cable.Change the valve block cable.
YYeses
5. Is the voltage between P71.1 and5. Is the voltage between P71.1 and
P71.2 < 27V when the reach out leverP71.2 < 27V when the reach out lever
is activated?is activated?
YYeses
Go to point 7.Go to point 7.
NoNo
6. Replace the valve block.6. Replace the valve block.
7. Breakage or short circuit in the coil7. Breakage or short circuit in the coil
between P72.1 and P72.2?between P72.1 and P72.2?
YYeses
Change the coil.Change the coil.
NoNo
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