Junkers ZWC 18-3 MFK, Service Manual

Page: 27 / 87

5.2 ZWC / ZSC 18/24/28-3 MFK / MFKP and ZWE 24-5 MFK types
Pos. D efinition
M easurement
Point
V alue E xpected
Heatronic
Parameter
E xplanation T olerance
6 Limit
Thermostat
White socket
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
(RAS 2,5:20 pole connector)
Connector: 13-14
0 ?
Limit=110°C
6.1
Flue gas NTC
(Agü)
White sock
Connector:7-8
Cable colour:blue
20 ºC => 12,2 k?
80 ºC => 1,6 k?
A.E
± 0,5 k ?
Turn off
temperature
70 - 104 ºC
6.2
Combustion
Chamber
Temperature
Sensor
White sock
Connector: 5-6
Cable colour: red
20 ºC => 125 k?
120 ºC => 3,6 k?
A.F ± 0,5 k ? Can be
Can be
Measured at
Measured at
NTC too
NTC too
6.3
CH flow
temperature
sensor (NTC)
White sock
Connector: 1-3
Cable colour: yellow
20 ºC => 12 k?
60 ºC => 2,5 k?
A.b ± 0,5 k?
18
1.Speed
2.Speed
3.Speed
Pomp
450 W
340 W
230 W
- ± ? Measure at the
pomp
connection
32 Ionization
electrode
White sock
Connector: 12
Cable colour: green
App. 4 - 5 µ A
- -
- -
36 CH Flow
temperature
Sensor (NTC)
White sock
Connector: 1-2
Cable colour: green
20 ºC => 14,7 k?
80 ºC => 1,7 k?
A.A
± 1 k ?
± 40 ?
52 Gas safety valve
Gas safety valve
1
2
White sock
White sock
White sock
Connector: 17-18
Cable colour:black/white
80 ? - ± 10 ?
52.1
Connector:16-17
Cable colour:grey/black
187 ? - ± 20 ? Connector 17
common
(neutral)
voltage!
Cut the
68 Regulator valve
Connector: 19-20
Cable colour:blue
80 ?
min. 27 mA
max. 130 (for LPG
165)mA
- ± 3 ?
151 fuse T 2,5
A,
230 VAC
At the fuse 0 W
Tab. 4
| 27 Electrial Values
6 720 660 238 (2008/07)
27