Recovering The Refrigerant In The Outdoor Unit - Fujitsu Waterstage WOYG160LJL Installation Manual

▼ 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, fig. 9, page
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
the start/stop switch
(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 again by turning the machine off and
opening the "liquid" and "gas" valves. Then after
2-3 minutes, restart the pump down operation.
Waterstage / Installation / 2011 - EN
13). Disconnect the outdoor
power supply. Switch
to position
operation fails, try
1.
the
DIP SW
fig. 24 - Location of DIP switches and LEDs on the
hydraulic unit interface board
1
LED2
(Green)
LED1
(Red)
Interface Board
2
U0629273-A
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