Incorrect Voltage Readings - Valtra 6000 Workshop Manual

31. Σ---power system
Incorrect voltage readings may be caused by:
Pins
+<> ---: battery cable shoes, bad battery or faulty alternator.
1<>5: fuse F26, connectors X35, A13, or X4 or earth point GR9 in the cab front wall.
1<>7: Versions 1.0 and 1.1: connector A13 or earth point GR9.
1<>4: Versions 1.0 and 1.1: connector A13 or earth point GR9.
6<>5: connectors B4 or A13 or earth point GR9 or sensor B4.
3<>5:
connectors B5 or A13 or earth point GR9 or sensor B5.
1<>12: Versions 1.0 and 1.1: fuse F26, connectors X35, X4, A13 or earth point GR9.
9<>12: Versions 1.0 and 1.1: fuse F22, switches S28 or S29, emergency stop socket X31, PTO switch
S25, PTO emergency stop relay K16 or connector X35 or earth point GR9.
11<>12: Versions 1.0 and 1.1: connector A13 or earth point GR9. If these are OK, but the voltages are
incorrect, fault can lie in control unit A13. If the voltages are OK, but the % ---display does not function, check con
nectors X35 and X27. If the % ---display is still defective, check relay K19. Fault can also lie in the instrument elec
tronics.
2<>12: Versions 1.0 and 1.1: connector A13 or earth point GR9. If these are OK, but the voltage read
ings were incorrect, the fault lies in the control unit A13. If the voltages were OK, but the ETB---light does not light,
check connectors X35, X26, X27 and ETB---light earth point GR5. If these are OK, but the ETB---light does not light,
the lamp can be defective.
9<>5 Version 2.0: fuse F22, switches S28 or S29, emergency stop socket X31, PTO switch
S25, PTO emergency stop relay K16 or connector X35 or earth point GR9.
11<>5: Versions 2.0: connector A13 or earth point GR9. If these are OK, but the voltages are incorrect, fault can lie in
control unit A13.
If the voltages are OK, but the % ---display does not function, check connectors X35 and X27. If the % ---display is
still defective, check relay K19. Fault can also lie in the instrument electronics.
2<>5 Versions 2.0: connector A13 or earth point GR9. If these are OK, but the voltage readings were incorrect, the fault
lies in the control unit A13. If the voltages were OK, but the ETB---light does not light, check connectors X35, X26,
X27 and ETB---light earth point GR5. If these are OK, but the ETB---light does not light, the lamp can be defctive.
Note! If the measurements above show, that the unit is OK, but the higher output range does not engage,
although the PTO loading is high (>25---30 %), the fault lies in the control unit A13, in the solenoid valve Y13 or in its wiring.
Others
If the sensor (B4, B5) wires are connected wrongly, the sensors will be damaged and also the control unit can be damaged. A
damaged sensor does not damage the control unit, but too high voltage (>16 V) may damage it. The control unit does not
be damaged, although the output lines (e.g. solenoid valve) are in a short circuit.
1. 10. 1999
1. 9. 2002
94
Model Code
8750, 8950 313
Page
8