Farmer 400
Fav 700
Fav 900
Tractor / General system
Troubleshooting chart: instrument control block at Pext and LSext
B
Faults
02.11.2000
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Troubleshooting chart: instrument control block at Pext and LSext
Text-module
Message - symptom - fault
A
Rise in oil temperature
B
Commands not being carried out, i.e. "implement not working"
C
Commands are carried out only with a delay
D
Performance (pressure / volume) at implement too weak
E
F
G
X
likely
possible
Fault
Cause
Action, if neces-
sary see ...
O
A B C D E F G H J K L
X
Lack of cooling
Contaminated
radiator
Check
O
Insufficient residual
oil volume in tank
Check
O
Visco fan does not
kick in
Check
X
Engine speed too low
X
LS pump working
constantly against
pressure
Implement cannot
reach setpoint
Check
X
Consumer working
against stop too long
e.g. seized valve or
time function of EHS
valve too long
Check
X
Transmission of
command in LS line
corrupted
Air in LS line
(especially at
commissioning)
Bring valve to max.
pressure capacity
and then bleed LS
line as close as poss.
to LS pump
X X
Excessive pressure
drop in P connecting
line
In Fav 900: LS pres-
sure increase
("Control pressure
increase") not
actuated
Check
O
Connection cross-
sections too small
X X
Control block not mat-
ched to LS, i.e.
pressure supply
system working as
open system
"LS screw" not cor-
rected
See relevant
Operating Manual for
implement
