Checking Electronic Level Control In Manual Mode (Attix 751-61/-71,19 Gallon Ae) - Nilfisk-ALTO ATTIX 751-01/-11/-21 Repair Manual

Nilfisk
ALTO
7.11 Checking electronic level control in manual mode
(Attix 751-61/-71, 19 Gallon/AE)
Attix7 3641
Attix7_ver.1.0_140105
Troubleshooting
1. Make sure the unit is isolated from the power supply.
2. Remove the hood (see 4.4, page 31).
3. Place the cleaner head on a table so that the hose
hangs downwards.
4. Remove the two motor cables from the board and
the switch.
5. Connect the test lamp 302000764.
6. Apply line voltage and set the switch to "I"
(Man) for full power.
Visual check:
Green LEDs (D2 and D7) illuminate.
Red LED (D3) flashes (microprocessor working).
Check soft start and speed control:
The motor lamp slowly starts to illuminate (soft
start).
Set the switch to minimum speed.
The brightness of the lamp reduces.
Check level control:
Mark the hose at 11 cm.
Slowly immerse the hose in a container filled with
water until the lamp extinguishes. This turn-off point
should be at the marking 11 cm +1 cm (recalibrate
the level control if necessary (see 7.) and repeat the
procedure).
Green LED (D2) illuminates, red LED (D3) flashes.
Red LED (D5) illuminates.
7. The system can be activated again after a reset.
"Manual" OK?
Yes - "MAN" Mode OK.
No - Replace electronic and
recalibrate level
E
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