PLDC01938
REVISION 00
01/06/2011
TECHNICAL DEPT.
Stavale
- date 05/09/2011
114/195
B3.2 Checking operation of the detergent pump + solenoid valve.
Water delivery through the detergent pump and operation of the solenoid valve is controlled by
the electronic control unit on the control panel. According to the quantity of water selected on
the control panel, the control unit commands constant or intermittent functioning of the solenoid
valve and power to the water pump which as a result rotates more or less quickly.
The electronic control unit on the control panel also acts as a switch as when zero detergent is
selected (no LED on) the pump is off. The solenoid valve is also therefore off. The minimum
output voltage is ~ 9.5 ± 1 V with one LED on, ~ 15.5 ± 1 V with two LEDs on, ~ 19.5 ± 1 V
with three LEDs on, ~ 25.5 ± 1 V with four LEDs on, ~ 34.5 ± 1 V with five LEDs on and ~ 36.6
± 1 V (maximum voltage) with six LEDs on..
Checking the output voltage (V)
1
Make sure the batteries on the machine are charged (36 V ± 1 V).
2
Move the machine onto a flat dry area of floor.
3
Turn the machine off and press the pedal to put the parking brake on.
4
Enter user programming and in Program 1 set “AutoPowerOFF” to OFF.
5
Press the button A on the control panel to release the brushes.
6
Lift the seat support, disconnect the "operator present" sensor and bridge it on the main machine wiring side
by means of the connector B.
7
Unscrew the screws C fixing the control panel to the front of the machine.
8
Lift the control panel and identify the 12-pin connector D.
D
D4
D3
B
PHOTO 246
C
C
C
A
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