Viessmann CT3U, Инструкция по эксплуатации

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3. Set the upper heating output: Press
a
until the
display shows "d 00".
4. Press
b
and
S
simultaneously; the burner
returns to modulating mode. The burner continues
at the original modulation level at which status "d"
= controlled stop was initiated.
Fault display
If the burner control unit switches to a fault state, the
fault display is automatically activated. The most
recent fault is then displayed.
Status Service
Fig. 44
A
Fault code of the most recent fault (see table on
page 32)
Status Service
Fig. 45
1. Press
a
.
While this key is held down, the operating phase in
which the fault occurred is displayed under "Serv-
ice". (Phase from "01" to "36". See flowchart on
page 38).
2. Press
b
.
While the key is held down, additional fault infor-
mation is displayed under "Service".
3. Hold down the reset button for longer than
¼
s.
The operating display appears again. The burner
control unit is reset.
Fault memory
The 10 most recent faults are saved and can be called
up. The most recent fault code is shown first, followed
by the preceding codes. If no key or the reset button is
pressed within 20 s the fault memory display termi-
nates automatically. Note
If the burner repeatedly restarts after a fault, establish
the cause of the fault. Call up the fault memory.
1. Calling up the fault
Status Service
Fig. 46
1. Press the reset button and key
a
simultaneously.
The most recent fault is displayed:
Initially, "0" is displayed under "Status".
The fault code is displayed under "Service".
Burner control unit
(cont.)
5783 337 GB
Diagnosis