UNITOR HPC 54/1 67/1
8 Troubleshooting
Fault
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
24
Cause
•
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
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 UNITOR
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