96
Frost stat switching point, delivered con-
dition:
1SP = –1 °C
Open switching contact:
Frost protection enabled; com-
pressor shuts down (message
"CA Protectn device primry"
,
see Vitotronic 200, type WO1B
service instructions).
1HY = 3 K
At 1SP + 1HY = 2 °C switching
contact closed:
Heat pump in standby mode.
Setting the frost stat switching points (if required)
Press the following keys:
1. Hold down
+
simultaneously
for 5 s; the first parameter is dis-
played.
2.
/
for the required parameter.
3.
to show the set value.
4. Hold down
and set the required
value simultaneously with
/
.
5. Release
to save the set value.
6. Press
or wait 30 s to exit the
menu.
Parameter
Description
Delivered con-
dition
Setting range
1SP
Switching point for opening the
switching contact
–1 °C
–5 to –1
1HY
Switching point hysteresis for
closing the switching contact
(1SP + 1HY)
3 K
2 to 5 K
All other parameters
Never adjust
Parameter
only
for emergency mode:
1PF
Frost alarm in the case of sen-
sor fault
OFF
ON / OFF
!
Please note
There will be
no
frost protection
for the heat pump if parameter
1PF is set to ON.
Set 1PF
only
to ON for short-
term emergency mode.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5848 164 GB
Содержание BW 301.A090
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