Kärcher SB OB Manual Del Usuario página 25

Monitoring and safety devices
Pressure relief valve
If the lever of the high-pressure gun is released, the cir-
culation valve opens but the high-pressure pump re-
mains in operation. The high-pressure jet is immediately
available when the trigger gun is opened again.
Motor circuit breaker
The motor circuit breaker shuts off the device if power
consumption is too high.
Winding protection contact
A winding protection contact is only installed in models
with 900 l/h.
The winding protection contact in the motor winding of
the pump drive sends a signal to the controller in the
case of thermal overload. This switches the motor off.
Temperature controller
The temperature sensor switches the electrical heating
element on when the water temperature in the hot water
float tank falls and switches it off again when the maxi-
mum temperature is reached.
Overheating protection
The float switch in the hot water float tank switches the
electrical heating element off if the water level is too low.
Dry running sensor
Prevents operation of the electric heating element when
the hot water float tank is empty.
Hard water sensor
Only for systems with base exchanger.
If the residual hardness of the softened water exceeds
a limit value, the control calculates the residual capacity
of the base exchanger bottle.
Regeneration of the base exchanger bottle is started the
following night at the latest.
Frost protection pump filter
1
Hot air blower
2
Frost protection ball tap with sieve
3
Detergent canister
4
Dosing pump
5
Pressure sensor
Only for systems with reverse osmosis.
If there is water shortage, the system is stopped to pre-
vent the RO pump from running dry.
Buffer tank full level switch
Only for systems with reverse osmosis.
Switches off the RO pump when the permeate buffer
tank is full.
Buffer tank full level switch
Only for systems with reverse osmosis.
Switches on the RO pump when the permeate buffer
tank is full.
Care and service
Maintenance instructions
Regular maintenance according to the following mainte-
nance plan is fundamental for a safely operating sys-
tem.
Use only original manufacturer spare parts or parts rec-
ommended by the original manufacturer, such as
● Spare parts and wearing parts,
● Accessories,
● Operating materials,
● Detergent.
DANGER
Danger of death from electric shock.
Switch off the device at the on-site main trigger and se-
cure against being switched on again before working on
the device.
Allow only qualified electricians to work on electrical
components of the system.
System overview
High-pressure pump
6
Coin box
7
Coin acceptor, coin slot
8
Lockable coin cassette (option)
9
Lock
10
English
WARNING
A high pressure water jet can escape from damaged
parts and cause injuries.
Depressurise the system by turning the trigger to "0/
OFF" and then opening the high-pressure gun until the
pressure has been released from the system.
ATTENTION
A high-pressure water jet can damage system com-
ponents.
Do not clean the interior of the system with the high-
pressure jet. When performing exterior cleaning, keep
the high-pressure jet away from the upper section of the
system (with coin slot, remaining value display and pro-
gram switch).
1. Switch off the on-site main switch and secure it
against being switched on again.
2. Disconnect the water supply.
Who is permitted for perform maintenance work?
Operator: Work labelled with "Operator" may only be
performed by instructed persons capable of operating
and maintaining high-pressure systems.
Customer Service: Work labelled with "Customer ser-
vice" may only be performed by KÄRCHER customer
service technicians or KÄRCHER-authorised techni-
cians.
Safety inspection/maintenance contract
You can agree on regular safety inspections or close a
maintenance contract with your dealer. Please seek ad-
vice on this.


Detergent filter
11
Float valve
12
WSO ultra-fine filter
13
Tool holder
14
Salt tank
15
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