Specifications

7 181 465 346 GB (03.02)
14
Failure identification procedure
3.2 Summary
3.2.1 Appliance faults 3.2.2 Faults that are not displayed
Appliance faults
Category ZB ...A ZB ...A Conventional ZWB ...A Page
A5 3 X 15
A7 3 X 17
A8 3 X X X 19
AC 3 X X X 20
Ad 3 X 22
b1 2 X X X 24
C1 2 X X X 25
CC 3 X X X 26
d3 2 X X X 27
E2 2 X X X 28
E9 4 X X X 30
EA 4 X X X 32
F0 4/
2
XXX 37
F7 4 X X X 38
FA 4 X X X 39
Fd 4 X X X 41
Table 8
Appliance faults
ZB ...A ZWB ...A Page
Excessive burner noise, rumbling
noises
X X 42
Flue gas levels incorrect, CO level
too high
X X 43
Ignition too harsh, ignition poor. X X 44
Boiler indicates P1, P2, P3 at
start-up and then restarts
with P1,...
X X 46
Loose or broken contact on heat
store NTC sensor
X X 46
Specified CH flow temperature
from TA... programmer exceeded
X X 47
Table 9
Programmer faults
TR 2 and TR 212 E TA 211E and DT 2 Page
Set room temperature not
reached.
X 48
Set room temperature
exceeded.
X
Set room temperature not
reached.
X 49
Set room temperature
exceeded by large amount.
X 50
Excessive fluctuations in
room temperature
X X 50
Temperature rises instead of
falling
X X 51
Room temperature too high
in Economy mode
X X 50
Incorrect or no modulation X X 51
Heat store fails to heat up X
Table 10