Case 580SR Service Manual page 339

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FAULT CODE F4 / BATTERY OVERVOLTAGE
(17 V +)
Over voltage
Even power supply levels up to 30 V will not damage
system components.
Above a power supply of 17 Vdc:
Group Fault 1 - Fault code 7.
NOTE: the speed sensor system will not operate
when an overvoltage is present.
Above a power supply of 24 Vdc:
the analogue signals are not reliable to convert any
more.
Over voltage: when the voltage exceeds 17 Vdc.
Action of the Microprocessor:
Z no upshifts above second gear.
Z direction change while in Forward 3 or Forward 4:
the actual reversal is preceded by a downshift se-
quence until second gear is obtained.
Z brake switch activation always engages 4WD.
NOTE: with voltages below 8 Vdc, the microproces-
sor enters the reset mode.
Intermittent power loss
After power is restored, the microprocessor goes
through the reset mode.
SECTION 21 - TRANSMISSION
F
N
R
Blinks
1
2
3
4
5
1
2
3
4
F
N
R
1
2
3
4
5
1
2
3
4
+ 24 VDC
F
N
R
1
2
3
4
5
1
2
3
4
- 8 VDC
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273
T
N
Blinks
Slower
Blink
Blinks
6
7
8
F28362
T
N
6
7
8
F28363
T
N
6
7
8
F28364

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