59
We reserve the right to make technical changes.
83052300eUK © ait-deutschland GmbH
commIssIonIng / sWItchIng on
for the fIrst tIme
When switched on for the rst time the language selection
appears rst
page 55, „Selecting language of the screen dis-
play“
When the heat pump is switched on for the rst time the
above display appears.
No ZWE (second heat generator) is released by the con-
troller until the display is conrmed with OK
NOTICE
No heat generator runs during a cold start of air/
water heat pumps.
The display always appears when the controller is switched
on or on changing to the standards menu. This screen is no
longer displayed if the heat pump or ZWE1 has more than
10 operating hours.
ATTENTION
The unit can be damaged if the display is conrmed
with OK, although the system is not properly lled.
On switching on the controller voltage, under certain
circumstances the following is displayed (only LWD…
and SWP371-SWP691 and SWP291H-SWP561H):
After deleting this display the unit can be operated pro-
perly. Otherwise test the 3 pole cable for the BUS con-
nection.
The following display then appears:
Notice
The heating phase until the compressor starts
can take several hours when starting up air/wa-
ter heat pumps for the rst time.
NOTICE
In the case of LWD units the ow is monitored
while the pump is running. If the ow is not ok, the
heat pump does not start up and no error is dis-
played. To this end, check the ASD input, if it is not
set to ON the ow is too low.
page 35, „Query inputs“
The selection possibility for the heat source for
SWP371
to SWP691and SWP291H to SWP561H.
NOTICE
For SWP 371 to SWP 691 and SWP 291 H to SWP
561H it is necessary to select whether water or
brine is to be used as the heat source uid, oth-
erwise the unit doesn’t work. The set uid can be
viewed under System Settings and can be changed
from Customer Service access level. TWQ-Min can
be changed using the customer service access, if
brine is selected. For SWP: Low pressure cut-off
value with water: 7 bar. For SWP: Low pressure cut-
off value with brine: 4 bar
• Brine:
This setting must be selected if the heat pump is ope-
rated with a brine - water mixture. Whether probes or
surface collectors are used is irrelevant.
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