121
Model Code Page
37. Autocontrol 5 / 5.2
1. 8. 2000
370 7
6250--8950
1. 9. 2002
C. Working orders, AC 5 and 5.2
--- If the display unit shows a fault code:
Measures:
1. Decode the fault code according to instr. 370/5 ---6 (self---diagnosis)
2. Chec k the function of the component in the test modet (instr. 370/8).
3. Repair the fault.
4. If the control unit A1A or programs have been changed, make necessary settings according to instr. 370/24A.
5. Carry out all points in thetestmode(instr.370/8). This ensures, that the tractor is OK before delivery. From ser. no.
K41107--- incl: Check in the fault co de memory F1.
6. Test---run the tractor according to instr. 370/24E.
--- If the display does not show the fault code:
In the table below, there are faults which have not the fault codes:
Component:
Possible reason: Measures:
1. AC 5 display unit does not
function (on the LH side pillar)
--- control unit A1 supply voltage or earth
has malfunctions or the display supply.
--- display unit P6 faulty
--- control unit connector A1A1 loose
--- c h e c k f u s e F24
--- voltage measures from control unit A1
connectors A1A1/1 – A1A1/2 (=battery vol-
tage)
--- new display unit, if the system does not
function
--- check connections
2. In the dashboard there is lit
“P” , although the driving directi-
on has been selected
--- shuttle lever switch S15 (P) faulty or
wrongly fitted.
--- testing in the test mode, point d16 / d22
--- 1 )
--- check the fitting of switch S15 (page
370---20)
3. Black arrow is blinking, altho-
ugh the driving direction has
been selected
--- driver has left the seat over 4 (6) se-
conds. AC 5.2: over 30 sec., when the
clutch pedal is depressed.
--- detector switch S60 (in the seat) does
not function or wire damage
--- on the seat, shuttle lever to position P,
shuttle lever to the driving position
--- testing in the test mode, point d05, 2)
4. Black arrow does not change,
when using the shuttle lever
--- shuttle lever switch S40 (F) or S41 (R)
faulty or loosed in the frame.
--- testing in the test mode, points
d09, d10 / d18, d19
5. Shuttle, DPS or PTO have
malfunctons (e.g. function is
slow)
--- fault, that the control unit A1 has not
identified
--- pressure in the low pressure circuit too
low
--- clutch pre ---fillling or initial pressure
indexes are wrongly set
--- carry out all procedures in the test mode
(instr. 370/8)
--- low hydraulics pressure measuring, see
instr no. 911---1
--- check indexes / in the setting mode,
(instr. 370/24D,AC5.2:instr. 371/11.)
6. Engine do es not s tart (starter
motor does not rotate)
Tractors J38343---.
---nosupplytocontrolunitA1.
--- Parking brake switch S15 or input sig-
nal A1A4/14 (AC 5) or A1A8/8 (AC 5.2)
faulty
--- Control unit out put signal A1A2/3 (AC
5) (to relay K28) or A1A3/5 (AC 5.2) faul-
ty.
--- c h e c k f u s e F 2 4
--- testing in test mode, point d16/d22 (if
necessary, change switch or control unit)
--- Check whether the voltage from control
unit A1 is in relay K28 ( when necessary,
change the control unit).
Note! If the fault cannot be found, try to find it by carrying out all tests in the test mode FII.
1) The parking brake can be released with a tool which incl. in the tractor tool set (after this the tractor can be towed).
2) If detector switch S60 does not function, it can temporarily be by--passed by connecting switch wires with an auxiliary wire (connector beside the seat
holder). T he switch must be changed and the auxiliary wire removed as soon as possible (safety).
Fault function levels, AC 5 and 5.2
In the fault function leves the different faults cause different
protective functions to the tractor. For instance in the func-
tion level 2 the tractor driving is possible but the use of the
PTO is prohibited. In the fault function level 4 the tractor
driving is prevented until the fault has been repaired.
The number of the fault function levels is 4 pcs. Greater
digit means a great priority and vice versa. The fault func-
tion level is active, until t he current is switched off. If two
faults with the prior ity of 3 have been found simultaneous ly,
the fault function level is always 4 (for instance if two DPS
propor tional valves are in short circuit simultaneously).
F ault function level 1 (”fault code”)
Only a fault code in question in the display. With the tractor
can be driven, but DPS can have malfunctions.
F ault function level 2 (”PTO protection”)
The fault code in the display. The PTO is disengaged
immediately and a driver can activate it after the current is
switched off and on. The tracto r can still be driven.
Fault function level 3 (”home driving”)
The fault code in question in the display. Shuttle automatics
are not in function and the PTO stops. Driving direction can be
engaged only with clutch pedal depressed.
The control unit reads shuttle parameters from the table for
greatest temperatures. Control unit connects all faulty sole-
noid outputs unenergised. DPS is locked. Before driving the
tractor, the control unit clears up which one of the DPS speeds
can be engaged so that the faulty soleno id output is unener-
gised. If the s peed in question is not the speed which is now
engaged, the speed is changed automatically.
F ault function level 4 (”immediate downdrive”)
The control unit connects all proportional valves unenergised.
Only a fault code in the display, not other information. The
tract or cannot be driven, before the fault has been re paired.
This is for protec ting slipping clutches and engine overload-
ing.
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