
7
Troubleshooting support
If no base image or error message is shown on the
display after switch-on, the explanations in the fol-
lowing table may be of use.
Discovery
Possible cause
Remedy
Nothing shown on the display
Controller is not switched on.
External switch is set to OFF.
Check the fuses and set the
external switch to ON.
Wiring is faulty.
Open the controller and check the
wiring!
Status display
STA01 STATUS
n
5: Fault
n
7: Warning
Return to the start page in order to
read the ERROR or INFO code. For
further information, see
Ä
Chapter
7.1 “Error message” on page 48
and
Ä
Chapter 7.2 “Info message”
on page 49.
STN1...5 STATUS STATION CAS.
n
104: Error
Return to the start page in order to
read the ERROR or INFO code. For
further information, see
Ä
Chapter
7.1 “Error message” on page 48
and
Ä
Chapter 7.2 “Info message”
on page 49.
ZIR07 CIRC. CALIBRATION
n
11: Error – Flow despite being
switched off.
n
12: Error – Flow rate fluctuations
too great when the pump is
switched on.
n
Check the hydraulics,
SEK04
FLOW RATE DHW
>
STE15 MIN
FLOW RATE
, tapping active or
external circulation
n
Check the pump,
SEK04 FLOW
RATE DHW
>
ZIR08 FLOW RATE
CIRCU ZIR05 TOLERANCE
CALI. CIRC
ES 5941
Troubleshooting support
08/2020 Item no. 215790 EA no. 1321
Operating instructions
47