Junkers ZWC 18-3 MFK, Service Manual

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8 | Functions of Heatronic 3
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3.2 Failure display:
Failures are shown with an Alfa numeric code. So the reason of
failure is determined and the failure is removed quickly and safely.
The failures are of 4 groups.
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Category 1:
The appliance remains locked until the main switch is interfered.
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Category 2:
The appliance remains locked until the failure is removed.
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Category 3:
The appliance keeps limited run
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Category 4
The appliance remains locked until the reset button is pushed.(the
reset button flashes.) To reset the appliance push the reset button
for a long time.
3.1 Temperature display:
In normal opening conditions while heating, display only
demonstrates the temperature of CH flow. The display with two
digits shows the temperatures between 00 and 99°C. if the
temperature exceeds 99°C the display shows a max 'U9'.it can
not exceed U. (Ex: U3=103°C)
When domestic hot water tapped “.” is displayed.
At service function if adjusted value is over 99 it is displayed one
after the other.
E.g.: display 13. and then 05. Means 1305.
3 HEATRONIC 3 UNIT FUNCTIONS
To reset the appliance push the
reset button for a long time.
3.3 PRIVATE WORKING PROGRAME DISPLAY
Example:Working at min power symbol
In display, temperature of CH flow and- are shown one after the
other.
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The appliance works in minimum power.
To remove this function the instructions below should be
followed:
Push the Button approximately 5 seconds(in display –
is seen.)Stop pushing the button whenl the button's light is
on. On display number and letter are demonstrated.
(eg:1.A).
Push the both and buttons together for 3
seconds.(In display “--” is seen.) push the button for a long
time until 2 nd service level is reached. The display will
show 8.A.
Push either or buttons until 9.A is demonstrated
in display.
Push once the buton. After then the button's ligth will be
on and the chosen value (1) will be demostrated in the
display.(1 means continuous working at min power)
Push either or buttons until 0 is demonstrated in
display.(0 means normal working)
Push the button and keep on pushing until is
demonstrated. Which means requested operation mode
memorized. The CH flow temperature again will be
demonstrated in display.
Example:Continous working at max. power “ “
Display shows CH flow temperature and “ “ . This means
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The function is memorized in the service mode. The
appliance works continuous at maximum power. Because it
is fixed with service function.
To remove this function the instructions below should be
followed:
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Push the button approximately 5 seconds(in display
– is seen.)Stop pushing the button when the button's light is
on. In display service function number and letter are
demonstrated. (eg:1.A).
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Push the both and buttons together for 3
seconds.(On display “--” is demonstrated.) Keep on pushing
the buton until 2 nd service level is reached display will
show 8.A.
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Push either or buttons until 9.A is
demonstrated in display.
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Push once the buton.
Then the button's ligth after on and the chosen value (2) will
be demostrated in the display.(2 means continous working
at max. power)
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Push either or buttons until 0 is demonstrated
in display.
? Push the button and keep on pushing until “ “
is demonstrated.Then the CH flow temperature again will
be demonstrated in display.
Appliance will work continously without checking
need of DHW or CH demand. Pump works
continously.
6 720 660 238 (2008/07) 16