Junkers ZWE 24 MFA Series User Manual

Description
The boiler probe is defective
Check the differential pressure switch
There is no response signal from LSM.
Is the gas tap open? Check the dynamic gas
pressure, ignition electrode and cable, ionization
electrode and cable, exhaust pipe and CO2 .
Tab. 10
Display
Ad
The differential pressure switch does not switch off
in idle mode
The external probe of TA 'is interrupted.
The flow temperature probe is interrupted or
short-circuited.
E9
False ionization signal.
Ionization current remains after the gas
valve is disconnected.
AC
The coded plug is inserted correctly,
respectively it is measured and possibly
replaced.
Check the differential pressure switch and exhaust
pipe
Differential pressure switch disconnected during
operation
Check the LSM wiring. The underfloor heating limiter
has switched off.
Check that the plug contacts, the RAM ignition
cables, and the Bus module are securely fastened,
and if necessary, replace the electronic board or the
Bus module.
There is no ionization current.
The domestic hot water temperature probe has
interruptions or short circuits.
Directions
The coded plug.
C6
E0
Check the ionization electrode cable for cracks
or cuts. Check that the control panel of the Heatronic
system is damp; if so, then it dries.
33
A7
C4
b1
d1
STB temperature limiter disconnected. Ventilate the boiler, check the NTC probe on the flow, the pump, as well as
the fuses on the electronic board.
FA
Check the gas valve and its connecting cables.
Check the connection cable between the module and
Heatronic.
Check the differential pressure switch and exhaust
pipe
CC
Check the outer probe and the connecting cable.
E2
Check the probe and the connecting cable.
F7
attached
There is no electrical connection between the
inserted auxiliary module and Heatronic.
Check the probe and the connecting cable.
The pressure switch does not connect
C1
Check the probe and the connecting cable.
Internal defect on the electronic board.
EA
9.1 Defect codes
9Anexÿ
6 720 610 828 RO (02.01)
Machine Translated by Google

Junkers ZWE 24 MFA Series Specifications

General

Brand	Junkers
Model	ZWE 24 MFA Series
Category	Boiler
Language	English