3.4.6 Recovering the refrigerant
in the outdoor unit
"
Before performing any maintenance, make
sure that all power supplies
have been cut off.
"
Stored energy: after cutting off the power
supplies, wait for 1 minute before accessing
the internal parts of the equipment.
Perform the following procedures to collect the
refrigerant.
-
1
- Switch the start/stop switch to the 0 position
(mark
3
,
figure 9, page 13
). Disconnect the outdoor
unit's power supply.
-
2
- Remove the front panel. Open the power control
box. Then turn
ON
the
DIP SW1
on the interface
board,
-
3
- Reconnect the power supply. Switch
the start/stop switch to position 1.
(The green and red LEDs start flashing;
1s on / 1s off).
The outdoor unit begins cooling
operation about 3 minutes after being switched on.
-
4
- The circulation pump starts.
-
5
- Close the liquid valve on the outdoor unit
maximum
30 secs after the outdoor unit starts.
-
6
- Close the gas valve on the outdoor unit when
the pressure is below 0.02 relative bar read on the
Manifold
, or 1-2 minutes after the liquid valve has been
closed, while the outdoor unit continues to operate.
-
7
- Disconnect the power supply.
-
8
- Recovery of the refrigerant is complete.
Notes:
-The pump down operation cannot be activated even
if
DIP SW1
is set to
ON
while the heat pump is in
operation.
-
Do not forget to switch
DIP SW1
back to
OFF
after
the pump down operation has been completed.
-Select the heating mode.
-If the pump down operation fails, try the
operation again by turning the machine off and
opening the "liquid" and "gas" valves. Then after
2-3 minutes, restart the pump down operation.
figure 24 - Location of DIP switches and LEDs
on the hydraulic unit interface board
DIP SW
Interface Board
LED2
(Green)
LED1
(Red)
OFF
ON
Installation and Operating Manual "1873- EN"
Alféa Extensa Duo A.I. Heat Pump
- 28 -
Содержание 024124
Страница 17: ... Installation and Operating Manual 1873 EN 17 Alféa Extensa Duo A I Heat Pump ...
Страница 29: ... Installation and Operating Manual 1873 EN 29 Alféa Extensa Duo A I Heat Pump ...
Страница 81: ... Installation and Operating Manual 1873 EN 81 Alféa Extensa Duo A I Heat Pump ...
Страница 86: ... Installation and Operating Manual 1873 EN Alféa Extensa Duo A I Heat Pump 86 ...
Страница 87: ... Installation and Operating Manual 1873 EN 87 Alféa Extensa Duo A I Heat Pump ...