62
N
Connection hose between pressure gauge set and
vacuum gauge
P
Valve for vacuum gauge
Q
Vacuum gauge
!
Please note
Overpressure will damage the vacuum gauge.
Never subject the vacuum gauge to positive
pressure.
1.
Close all valves at the pressure gauge set.
2.
Make all connections as shown above.
Note
■
Shut-off valve
E
must
remain closed.
■
For
all
connections, counterhold with a second
open-ended spanner.
3.
Start the vacuum pump.
At the pressure gauge set, open the valve to the
vacuum pump and the valve to the hot gas connec-
tion.
4.
After approx. 5 min, open the valve to the vacuum
gauge.
Leave the vacuum pump running until the indica-
tion on the vacuum gauge is almost at "0" (at least
30 min).
Note
The vacuum pump runtime will depend on the
ambient conditions.
5.
On the pressure gauge set, close the valve to the
vacuum pump.
Stop the vacuum pump and wait approx. 5 min. If
the indication on the vacuum gauge rises, there is
a leak.
Eliminate the leak and repeat the process.
6.
Close all valves at the pressure gauge set.
7.
Remove the vacuum pump and vacuum gauge.
Evacuating the indoor unit with the service function (pump down)
1. Service menu:
Press
OK
+
å
simultaneously and hold for
approx. 4 s.
2. "Service functions"
3. "Evacuate refrigerant line"
4.
Start the process with
"Yes"
.
■
"Initialisation"
is shown.
■
The secondary pump starts.
■
The compressor starts within 4 min. Refrigerant
circuit reversal is active.
Note
If the compressor does not start within 4 min, ter-
minate the function with and restart.
5.
Once the compressor is running, close the liquid
line shut-off valve on the outdoor unit.
■
The suction gas pressure falls.
■
"Is active"
is shown.
■
Once the suction gas pressure has fallen below
the minimum value,
"Terminates shortly"
is
shown.
6.
As soon as
"Terminates shortly"
is shown, close
the hot gas line shut-off valve on the outdoor unit.
Once the suction gas pressure has fallen yet fur-
ther, the compressor stops.
Commissioning, inspection, maintenance
Evacuating the refrigerant lines and indoor unit
(cont.)
51
17 700 GB
