Pinguely-Haulotte HA20PX, Руководство по ремонту

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BREAKDOWN DETECTION FLOW CHART
Sheet DP038
NO STEERING MOVEMENT
(RIGHT AND/OR LEFT) ON THE REAR AXLE
Folio 3/4
The defective
REAR steering movement
left (2) or right (1) is made in
response to an opposite movement
control: right (2) or left (1)
NO
YES
- Invert the coils of the jib electrovalve YV21A and
YV21B
- Press the pedal and make a travel movement
- Activate the REAR steering switch SM4
B
Put coils YV21A and YV21B back
into their original positions
D
NO
YES
12V OK at
terminals of
electric
connectors
- Open the turntable control panel
- Press the pedal and make a travel movement, activate
the REAR steering switch SM4 and check for 12V
voltage on terminals 307 (left) and 308 (right) of the
printed circuit
Replace the
defective coil
END
See Fiche
C059
NO
YES
12V
OK
Replace the
U1 module See Fiche
C058
Repair the connection or
replace the wiring harness
between the turntable control
panel and electrovalve YV21
END
NO
YES
The fault
persists
Replace the
printed circuit See Fiche
C063
END
END
Press the pedal, make a travel movement and
activate the REAR steering switch SM4 and
check for 12V voltage at the terminals of the
connector of YV21A or YV21B
Replace
electrovalve YV21 See Fiche
C067
ENDE