Page 8 – CNA Series (rev. 3.00) © HOBART GmbH, Service Training Center
SERVICE TRAINING CENTER
FUNCTIONAL DESCRIPTION
OPERATION
When the machine is switched off, a luminous red point (at the rinse temperature display)
indicates that the machine is connected to the main power supply.
Switching on the machine:
Note:
When switching on the machine, a test program of the control (inputs and outputs) will run and the
control panel is locked during this time. Therefore you should wait approx. 5 sec., before commands are
given via control panel.
When the doors are closed and the machine is switched on by pushing the ON/OFF button
, fill will be started.
TANK FILL
Via separate fill valve (hot water connention) [S18 = 1]
The machine will be filled by the cascade principle via warm water valve 1Y2.
When all float switches [1B2 & 2B2] of the machine are activated, the heatings in the respective tanks will be
switched on.
Then the machine will be overfilled via adjustable time [C02] (see service mode).
Refill during operation is controlled via timer [C03].
The conveyor start button illuminates red
during the fill and heating phase and will change to green light
when all operation temperatures (adjustable) are reached.
Via booster: machines with 1 cold water connection [S18 = 0]:
When the machine is switched on, first the booster will be heated [1K1]. If 70°C [F01] are reached, the rinse
pump 1M3 will start and the tanks will be filled via the rinse pipes.
Machine fill via booster can be temperature-controlled by parameter [S14 = 1].
In this case the booster will be heated up to 70°C before the rinse pump 1M3 will be started to fill the machine.
If the temperature drops below 48°C, fill (rinse pump) will be stopped until the booster has reached 70°C again.
Fill time control
The fill time of the machine will be controlled via adjustable time [C09] (base value = 30 min).
When the respective float switch has not close after this time period, the error message FIL 002 will be displayed.
The fault will be cleared as soon as the float switch closes again.
The filling of the machine remains activated when the failure occurs.
NOTE: The exhaust ventilator will also be controlled during the whole fill time.
BOOSTER
When the machine is switched on, the pressure pump will be started for approx. 5 sec. [C17] to guarantee refilling
of the pressure booster in case of water loss (e. g. evaporation or leakage during a longer standstill period).
During the machine tanks are filled, the booster will be heated up to 70°C [F01].
When the tanks are filled ( after time delay [C02] ), the booster will be heated up to 85°C ( set value [F02] ).
WASH OPERATION
When the machine is ready for operation, the conveyor can be started by pressing the conveyor start button
.
The conveyor speed (slow / fast) will be selected by pressing the conveyor speed button
and indicated
by the LED.
Note:
The conveyor can only be started when the machine is filled (re-fill completed) and the set value of 85
°
C
is reached in the booster.
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