Nilfisk-ALTO Poseidon 5 Series, Руководство по обслуживанию, Страница: 45 / 68

Troubleshooting
POSEIDON 5 NEW-NA5_en_Ver.1.0_20/12
45
E
Unloader failures.
Symptom:
Machine does not stop when releasing the spray gun.
Cause:
Defective spring (1), or defective activation arm (3), or defective micro switch housing (4),
or defective micro switch (5).
Remedy:
Replace defective parts.
Symptom:
Machine does not stop when releasing the spray gun. Pump runs in by-pass mode with
very high pressure — approx 180bar.
Cause:
Non return valve piston (12) - O-ring (11) - Seat (13) defective → System leaks internally or
piston (12) closes too slowly caused by dirt/chalk.
Remedy:
Replace Non return valve kit or clean dirty parts.
Symptom:
Machine starts by itself and stops right away.
Cause:
Pressure system leaks between spray gun and pump → Cut-off pressure drops and the
activation arm (3) releases the micro switch (5), or leaks at gaskets 6, 8, 10, 11.
Remedy:
Check gaskets in spray gun - Check gaskets 6, 8, 10, 11 and replace if necessary.
Symptom:
Working pressure too low.
Cause:
Machine by-passes water.
Remedy:
Spring (1) tension too low or leakage between ball (16) and seat.
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2
3
4
5
6
7
8
9
10 16
11
12
15
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13
Pic. E1: Unloader.