Troubleshooting - Rt10 - Worcester CDi Combi N.G Service Booklet

TROUBLESHOOTING - RT10

10 TROUBLESHOOTING - RT10
In the event of a fault in the heating appliance, the
display will show e.g.
A7 E.
In the event of a fault in the FW 100, the display will
show e.g. 1A4 E.
Here the figure 1 stands for a fault in the FW 100 and the
letter E for Error (= fault):
Display Cause
1A4 E Temperature
sensor in the
FW 100 defective.
1A8 E TD 200 using the
bus no longer
responds.
Heating appliance
using the bus no
longer responds.
e.g.: Error display for
A7 E the heating
... appliance.
Tab. 34
68
Supplied By www.heating spares.co Tel. 0161 620 6677
Remedy
Replace FW 100.
Check bus connection
and, if necessary, rectify
interruption.
Check bus connection
and, if necessary, rectify
interruption.
Rectify the fault in
accordance with the
heating appliance
documentation.
Complaint Cause
Required Thermostatic
temperature valve(s) in the
not reached room set to low
Flow
temperature
controller on the
heating
appliance set
too low
Air lock in the
heating system
Required Installation
room location of the
temperature FW 100 not
is greatly suitable, e.g.
exceeded outer wall,
proximity to
window,
draught, ...
Excessive Temporary effect
room of heat from
temperature other sources on
fluctuations the room, e.g.
from sunshine,
room lighting,
TV, fireplace etc.
Temperature Time of day set
rise instead incorrectly on
of fall the TD 200
Room Building has high
temperature degree of heat
too high in storage
low mode
Incorrect or Bus connection
no control defective for the
devices using
the bus
Tab. 35
8 716 115 748 (2009/09)
Remedy
Open the thermostatic
valve(s).
Set flow temperature
controller higher.
Vent radiator and
heating system.
Choose a better
installation location
move the FW 100.
Choose a better
installation location
and move the FW 100.
Check setting.
Select low mode
earlier.
Check the bus
connection and, if
necessary, rectify
according to the
connection diagram.