Ferm GRM1020, Original Instructions Manual

Page: 9 / 16

9
EN
Water inlet filter
Fig. 4
• The water inlet filter must be inspected regu-
larly, so as to avoid blockage and restriction of
the water supply to the pump. (fig 4)
Using the detergent bottle
Fig. 5
• Add detergent to the container.
• Set the Adjustable Spray Wand at low pressure
position.
• Trigger gun to spray detergent.
The use of detergents can dramatically reduce
cleaning time and assist in the removal of difficult
stains. Some detergents have been customized
for pressure washer use on specific cleaning
tasks. These detergents are approximately as
thick as water. The use of thicker detergents,
such as dish soap, will clog the chemical
injection system and prevent the application of
the detergent. The cleaning power of detergents
comes from applying them to a surface and
giving the chemicals time to break down the dirt
and grime. Detergents work best when applied
at low pressure. The combination of chemical
action and high pressure rinsing is very effective.
On vertical surfaces, apply the detergent starting
at the bottom and work your way upward. This
will prevent the detergent from sliding down and
causing streaks. High pressure rinsing should also
progress from the bottom to top. On particularly
tough stains, it may be necessary to use a brush
in combination with detergents and high pressure
rinsing.
CAUTION! Never disconnect the high-
pressure hose from the machine while
the system is still pressurized.
follow the correct procedure:
1. Turn off the pressure washer by using the
switch on the machine.
2. Unplug the unit from the power source.
3. Turn off the water supply at the tap.
4. Press the trigger of the gun to depressurize the
system.
5. Disconnect the supply hose to the machine
6. Wipe all surfaces of the unit with a damp clean
cloth.
7. Engage the safety lock.
5. SERvICE & MAINTENANCE
Warning! Unplug the electric cable
(power source) prior to any maintenance
or preparatory storage operations.
• Make sure that the machine is not live when
carrying out maintenance work on the motor.
• To ensure good performance, check and clean
the suction and detergent filters after every 50
hours of operation.
Malfunction
Should the machine fail to function correctly, a
number of possible causes and the appropriate
solutions are given below:
1. When switched on, the machine will not
start working.
• Plug is not well connected or electric socket is
faulty.
• Check plug, socket and fuse.
• The mains voltage is lower than the minimum
requirement for start up.
• Check that the mains voltage is adequate.
• The pump is stuck.
• Refer to after storage instructions. Switch
off the unit and let the motor cool.
• Thermal safety has tripped.
• Leave the lance open with water coming
through.
2. fluctuating pressure
• Pump sucking air
• Check that hoses and connections are
airtight
• Valves dirty, worn out or stuck. Pump seals
worn.
• Clean and replace or refer to dealer.
3. Water leaking from the pump
• Seals worn out
• Check and replace, or refer to dealer
4. The motor stops suddenly
• Thermal safety switch has tripped due to
overheating.
• Check that the mains voltage corresponds
to specifications. An extension cable,
which is too thin, and tool long can cause
a voltage drop and cause the motor to