T
Trro
ou
ub
blle
e ssh
ho
oo
ottiin
ng
g -
- o
op
peerraattiio
on
naal
l d
diissttu
urrb
baan
nccee
A
AT
TL
LE
ET
T S
SE
ER
RV
VIIC
CE
E M
MA
AN
NU
UA
AL
L
10.78
10.78
Electrical
Electrical system
system
Important!
Important!
For UFS trucks this err
For 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 i
The switch must be closed in order for the reach out movement to work. This
n 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 “R
in the service menu, where “RO” is
O” is
displayed if the switch is c
displayed if the switch is closed. A UFS truck drops down to creep speed and a
losed. 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?
Y
Yes
es
Go to point 4.
Go to point 4.
No
No
2. Does “E” = reach out, show when
2. Does “E” = reach out, show when
the joystick is activated in the menu
the joystick is activated in the menu
hydraulic inputs?
hydraulic inputs?
šš
No
No
Check the control cable for the reach
Check the control cable for the reach
joystick and
joystick and the joystick.
the joystick. If the j
If the joystick
oystick
is not working it should be replaced
is not working it should be replaced
and calibrated.
and calibrated.
Y
Yes
es
3. Check that the level f
3. Check that the level for the reach out
or the reach out
has not been accidentally set to 0.
has not been accidentally set to 0.
4. B+ 48V valve block connector
4. B+ 48V valve block connector
P71.1?
P71.1?
šš
No
No
Change the valve block cable.
Change the valve block cable.
Y
Yes
es
5. Is the voltage between P71.1 and
5. Is the voltage between P71.1 and
P71.2 < 27V when the reach out lever
P71.2 < 27V when the reach out lever
is activated?
is activated?
Y
Yes
es
Go to point 7.
Go to point 7.
No
No
6. Replace the valve block.
6. Replace the valve block.
7. Breakage or short circuit in the coil
7. Breakage or short circuit in the coil
between P72.1 and P72.2?
between P72.1 and P72.2?
Y
Yes
es
Change the coil.
Change the coil.
No
No
https://www.besttruckmanuals.com/