Troubleshooting - Nilfisk-Advance MC 5M Instructions For Use Manual

MC 5M - MC 6P - MC 7P

8 Troubleshooting

Pressure drop
Pressure fl uctuations
The motor does not start when
the cleaner is switched on
When the cleaner is switched
on the motor buzzes without
starting
The motor switches off
22
Fault
• Air in the system
• High pressure nozzle blocked
worn
• Detergent tank empty
• Pump draws in air (only
possible in suction mode)
• Lack of water
• Water inlet hose is too long
or its cross-section too small
• Lack of water caused by
blocked water fi lter
• Lack of water because max.
permissible suction height
has not been heeded
• The plug is not inserted
properly, i.e. there is no
current
• Oil level too low
• The mains fuse is switched
off
• The overload protection
has been activated due to
overheating or overloading of
the motor
• The mains voltage is too low
or there is a phase failure.
• The pump is blocked or
frozen
• Incorrect cross-section or
length of the extension lead
• The overload protection
has been activated due to
overheating or overloading of
the motor
• High-pressure nozzle is dirty
Cause
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Remedy
Vent the system by
operating the spray gun
several times at short
intervals. If necessary,
operate the cleaner for a
short time without the high-
pressure hose connected.
Clean/replace the high
pressure nozzle
Top up detergent tank or
set detergent to "0"
Check that the suction set
is air-tight
Open water tap
Use a water inlet hose
that can provide the water
fl ow (Q ) defi ned for the
max
machine
Clean the water fi lter in the
water connection (never
work without water fi lter)
See instructions
Check the plug, lead and
switch and if necessary
have them replaced by a
skilled electrician
Check oil/add oil
Switch on the mains fuse
Check that the mains
voltage and the cleaner
voltage are the same.
Switch off the cleaner and
allow it to cool for at least 3
minutes
Have the electrical
connection checked
Contact the Nilfi sk
customer service
Use lead with correct cross
section or length
Check that the mains
voltage and the cleaner
voltage are the same.
Switch off the cleaner and
allow it to cool for at least 3
minutes
Change the high-pressure
nozzle
Options / model variants
1)
Original instructions