Nilfisk-ALTO MC 3C, Service Manual

Page: 40 / 71

E
Troubleshooting
SM MC 3C_ MC 4M Ver.1.0_March 2015
40
Fault Cause Remedy
Pressure drop
- Air in the system.
- High pressure nozzle
blocked / worn.
- Pressure control on the
spray lance is not set
correctly.
- Water inlet temperature
too high.

Vent the system by
operating the spray gun
several times at short
intervals .If necessarily
operate the cleaner for a
short time without the
high pressure hose
connected.

Clean / replace the high
pressure nozzle.

Set the required working
pressure.

See technical data section
”B”.
Pressure
fluctuations - Lack of water
- Water inlet hose is too long
or its cross-section too
small.
- Lack of water caused by
Blocked/partly blocked water
filter.
- Lack of water because
max. permissible suction
height has not been
heeded.
- Pump sucks in air
(suction mode)

Open water tap.

Use specified water inlet
Hose (Refer to Operating
Manual).

Clean the water filter in the
water connection.
(Never work without water
filter).

See technical data section
”B”

Check that all connections
on the suction side are tight
so no air can be sucked in.
The motor does not start when
the cleaner is switched on. - The plug is not inserted
properly, i.e. there is no
current.
- The main fuse is switched off.

Check the plug, lead and
switch.
If necessary have them
replaced by a authorized
electrician.

Switch on the main fuse.