Junkers ZWC 18-3 MFK, Service Manual

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1. First Service Level
D esciription
D isplay Range Default V alue
1.A To decrease max heating power (%) 21 - U0 U0 (=100)
1.b To decrease max DHW power (%) 21 - U0 U0 (=100)
1.E
Pump switching type codes (1=depends on burner
2= room term.,3=outdoor thermostat ) 1 - 3 2
2.b Max. CH flow temperature
45 - 82°C
40 - 88°C
-82°C
-88°C
(°C) Z.C-3, Z.E-5
Z.C-3
Z.E-5
2.F Operation mode: (0= normal, 1= min. power
2=max. power)
0 - 2 0
2.d Legionalle protection (0=off , 1=on)
Adjust anti cycle time
0 - 1 0
3.b 0 - 15 min. 3 min.
3.C Adjust anti cycle flow temperature differenttial(K) 0 - 30 K 10 K
3.d Adjust min power 21 - U0 21
3.E The period activeting keep hot function(comfort mode) 20 - 60 20 min.
3.F Min. time for keeping hot 0 - 30 5 min.
4.b Max. preheating temperature for comfort function 40 - 60 60 ºC
4.C Hot water on demand 0 - 1 1 ( 0=inactive 1=active)
4.E Appliance type (0=only heating, 1=kombi, 2= tank (NTC)
3=tank with thermostat, 4=Stratification tank
0 - 4
(automoticly determined)
(automoticly determined)
Error code
5.b Fan overun time 1 - 18 (x10) sec. 3 (=30 sec.)
5.C Clock type (0=two channels,
1=one channel-CH circuit,2=one channel-DHW circuit)
0 - 2 0
6.A Show last fault
00 - FF
6.b
Display room thermostat voltage input (V)
(only for 1-2-4 connections)
0 - 24
Display
measured value
3.4. Service Functions
The service functions are divided into two levels: The 1st
level includes service function upto 7.C. the 2 nd level
includes service functions from 8.A
3.4.1 1st Level Service Mode
Selectiny service functions
To change or examine a service function:
?
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 with number and letter are
demonstrated. (eg:1.A).
?
Push either or buttons until desired service code
is displayed.
?
Push once the buton After then the button's ligth will
be on and the chosen value will be demostrated in the display.
To change/arrange service function:
?
Push either or buttons until desired service code is
displayed
To store a value:
? Push the button and keep on pushing until is
demonstrated. The CH flow temperature again will be
demonstrated in display.
To leave the service mode:
?
To leave the service plane push the button. the CH
flow temperature will be displayed again
Functions of Heatronic 3
Service
Mode
6 720 660 238 (2008/07)
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