Ammann ARR 1575, Workshop Manual

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294 ARR 1575
18 Troubleshooting
Defect description, the machine is not moving
Defect description Probable cause Check
The display unit is not working. F13 fuse Is F13 OK?
After turning on ignition, neither
the indicator lamps nor the display
are illuminated.
N2 display unit
K1 relay
After turning on ignition, there must be +12 V on pin 1
and ground on pin 8.
The relay must close when the ignition turns on.
The P3 operating hours counter is
not working and the H1 charging
indicator lamp does not go off dur-
ing when the engine is running.
G1 alternator
N2 display unit Is the connector connected?
After turning on ignition, there must be 0 V (ground)
on pin 7. When the engine is running, however, there
must be +12 V.
If the battery is charging anyway (voltage approx.
14 V), the problem is likely in N2.
When ignition is on, the H1 charging
indicator lamp is not illuminated.
G1 alternator
Cable, connectors, N2 display unit Connect the 133 cable to the ground. The indicator
lamp must be on.
The H6 warning indicator lamp is
on.
N1 control unit
F22 fuse
G1 alternator
S21 engine oil pressure switch
• The inclination sensor measured a value exceeding
45° (the diesel engine turns off).
• If the H5 safety bar indicator lamp flashes at the
same time: The engine may start after the S21 oil
pressure switch is closed (H3 is illuminated) and
when D+ at G1 is 0 V (H1 is illuminated).
• The control detected an error.
If the machine is not inclined and the N1 control unit
was installed properly, there is a problem with the con-
trol switching outputs -> control does not work.
The H3 oil pressure indicator lamp is
on when the engine is running.
S21 engine oil pressure switch Is the connector connected? Grounding? Engine oil
level OK? Engine oil pressure OK?
When the engine is stopped, the connection must
have a ground contact. When the engine is running,
the switch must be open.
The diesel engine suddenly turns off after 4 s.
The H3 oil pressure indicator lamp is
off when ignition is on.
S21 engine oil pressure switch
Cable, connectors, N2 display unit Disconnect the connector from the switch and connect
it to ground. The indicator lamp must be on. Is the con-
nector firmly connected? Corrosion-free?
The H4 water temperature warning
indicator lamp is on. The engine is
running.
S22 cooling water temperature
switch
Is the connector connected? Grounding?
At normal operating temperature, the switch must be
open.
The diesel engine suddenly turns off after 4 s.
When ignition is on, the H4 water
temperature indicator lamp is not
illuminated. Indicator lamp test.
S22 cooling water temperature
switch
Cable, connectors, N2 display unit
Defective? Is the connector firmly connected? Corro-
sion-free? Disconnect the connector from the cooling
water temperature switch and connect it to ground.
The indicator lamp must be on.
At normal operating temperature, the switch must be
open.
The diesel engine suddenly turns off after 4 s.