94
Flow switch indications
LED
Meaning
Several LEDs illuminate green.
Indication between no (no LED illuminates)
and maximum flow rate (all LEDs illuminate
green).
The higher the flow rate the more LEDs illu-
minate.
LED "9" flashes green.
Flow rate higher than nominal flow rate.
Possibly carry out an adjustment to obtain the
correct operating indications (High Flow bal-
ance, see below), for example if circulation
pumps had to be sized for higher flow rates.
LED "0" flashes green.
Flow rate below minimum.
Note
A fault is triggered if the flow rate undershoots
the switching point (message "D6 Flow
switch").
LED for switching point illuminates
orange.
Switching output closed; heat pump in stand-
by mode.
LED for switching point illuminates
red.
Switching output open; heat pump in a fault
state (compressor shuts down, message
"D6
Flow switch"
, see Vitotronic 200,
type WO1B service instructions).
All LEDs illuminate alternately red
and green.
Short circuit at the switching output.
Note
The current operating mode will be displayed
once the short circuit has been remedied.
No LED illuminates.
Operating voltage < 85 V~ or power failure.
Flow switch switching point, factory-set
Vitocal
Nominal
flow rate
Min. flow
rate
Switching point
Type
m
3
/h
m
3
/h
m
3
/h
LED
WW 1125
29.55
21.30
20 .. 22
0 1 2 3 4 5 6 7 8
9
WW 1155
35.00
26.40
25 .. 27
0 1 2 3 4 5 6 7 8
9
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5848 164 GB
Summary of Contents for BW 301.A090
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