9
Door sensors and door-locking
There is an automatic sensor on each door. These are connected
in series so that both doors must be closed to indicate doors
closed to the circuit board. Only then can the machine fi ll with
water and start. The sensor on the right-hand door locks before
fi lling or starting of a cycle, so that neither door can be opened
during washing.
Alarms and error codes
The GD 600 is provided with a number of alarm functions.
When an alarm is activated, all diodes on the panel fl ash and
an error message or error code is shown in the display. For more
information on error messages, see the section entitled Trouble-
shooting on page 23.
Steam reduction
Steam reduction is comprised of an ejector into which cold water
is sprayed via a jet. The steam reduction occurs as the steam in
the cabin condenses then circulates through the ejector. The
Steam reduction time is circa 1 minute.
Pumps
The wash pump is of a centrifugal pump type and is custom-
ised for operation with granules from Granuldisk AB. Behind
the pump is a distributor housing which evenly distributes water
and granules to the spray pipes.
The rinse pump is connected to the open rinse tank and used
during the rinse process, as well as when the wash tank is fi lled.
Granules
The operator can select washing with or without granules. This
is done on the control panel, which is marked with symbols for
water alone or granules, see section Control Panel.
Granuldisk AB’s granule potwashing machines work best with
our specially designed granules. The granules are designed to
give the best wash results and the longest working life for gran-
ules and machines. The guarantee is only valid if granules from
Granuldisk AB are used in the machine.
Granule valve
The granule valve is located at the bottom of the tank and opens
with the help of a solenoid valve. The valve closes with help of a
return spring. The granule valve’s working movements are 20 -
30 mm. The granule valve’s function can be controlled by a com-
puter with the aid of Granuldisk’s service program for authorised
technicians.
Note: While operating the valve function no one should have
their hands near the granule valve where there is a risk of them
getting jammed.
Spray pipe motor
The wash cabin contains two spray pipes operated by the spray
pipe motor. The spray pipe motor is a 230 VAC single phase
motor. Should the operation for any reason be obstructed, there
is a safety guard that stops the machine operating, the washing
cycle is paused and the machine is switched to the stop setting.
The motor is connected to the two spray pipes by means of a
transmission system. These execute a back-and-forth rotating
movement so as to allow the water to strike the entire surfaces of
the items to be washed.
On every wash arm there are four jets. There is also a fi xed jet
in the cover. The wash arm motor is located at the rear of the
machine together with the transmission system.
NB! When servicing, engineers should ensure that the power is
shut off so that the machine cannot be started with a risk for
injury.
Distribution box
The GD 600 is supplied with a separate electrical cabinet that
is located on the machine’s bottom plate behind the front plate.
The control system and all electrical components are located in
the electrical cabinet. To work in the electrical cabinet you only
need to unscrew the cover so that all components become acces-
sible. The electrical cabinet can be removed to access other parts
of the machine.
The machine is supplied with 2.5 metres of fi tted cable which
leads to the back of the machine. The GD 600 connects to 400V,
3-phase, earthed and is protected with 25A.
Cover plates
The machine is protected cover plates around the machine.
These plates may only be removed during service work.
NB! Always use heavy-duty protective gloves when removing or
replacing the cover plates. Use care if the machine is run without
the cover plates.
WARNING!
Only qualifi ed electricians may work
with the electrical unit.
The main fuse shall always be removed
when working with the electrical
components.
Incorrect connections can cost lives.
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