Valtra 6850 - Page 475

434
Model Code Page
35. Autocontrol IV
1. 1. 1994
6600E
8100E-- 8750E
352 8
G. ANALOG INPUTS
Here are given some base values for certain analog inputs. These values were measured from the AC---IV unit, which functioned
perfectly:
Power lift (A2C/32):
a) signal is about 194 when the lower links are in the lowest position
b) lower links in max transport height, signal is about 014.
--- if the signal values are correct everything is OK.
--- if no signal comes or deviates much from the values above, check the connectors and wiring. The fault can also lie in the hydrau-
lic power lift electronics.
Outside temp (A2C/29):
a) signal is about 130 at outside temperature of ---3˚C
b) signal is about 120 at outside temperature of +1˚C
N.B. Signal value decreases when temperature rises.
--- if the signal values are correct everything is OK.
--- if no signal comes or deviates much from the values above, the sensor is faulty or its wiring and connectors.
Coolant temp (A2C/30):
a) signal at coolant temperature ---2˚C is about 183.
b) signal at coolant temperature 15˚C is about 130.
c) signal at coolant temperature 20˚C is about 116.
d) signal at coolant temperature 25˚C is about 108.
e) signal at coolant temperature 40˚C is about 084.
f) signal at coolant temperature 50˚C is about 064.
--- if the signal values are correct everything is OK.
--- if no signal comes or deviates much from the values above, the sensor is faulty or its wiring and connectors.
System volt (A2C/25):
a) signal value is about 167, when the engine is running at 1000 r/min (correspond voltage ~ 13,5 V).
b) signal value is about 140, when the engine is stopped (correspond voltage ~ 12 V).
--- If the signal values are correct, everything is OK (values depend also on condition of battery)
--- If no signal comes or it is faulty, check connectors and wiring.
Acc pedal pos (A2C/7):
a) signal is about 020 when the acc. pedal is in the upper position (can vary even 20 units up or down).
b)signalisabout230whentheacc.pedalisinthelowerposition(canvaryeven20unitupordown).
--- if the signal values are correct, everything is OK
--- if no signal comes or it is faulty, check the potentiometer on the injection pump and its wiring.
Checking injection pump potentiometer, see page 351/4.
Checking temperature sensors, see page 351/4.