Fujitsu AUYG18LVLB Design & Technical Manual page 306

5. When LED display changes as shown in the below figure, close the 3-way valve on the gas
pipe side tightly.
NOTE: If the valve on the gas pipe side is not closed, refrigerant may flow into the piping
after the compressor stops.
6. LED display changes after 1 minute as shown in the figure below.
The LED will light as follows.
Fans and compressor stop automatically.
NOTE: If the pump down is successfully completed (the above LED display is shown), the
outdoor unit remains stopped until the power is turned off.
7. Turn the power off.
Pump down is completed.
NOTES:
• To stop pump down, press the [PUMP DOWN] button again.
• To start the pump down again after the compressor is automatically stopped due to an error,
disconnect the power supply and open the 3-way valves. Wait 3 minutes, reconnect the power
supply and start the pump down again.
• When starting the operation after completion of the pump down, disconnect the power supply,
and then open the 3-way valves. Wait 3 minutes, reconnect the power supply and perform a test
run in the "COOL" operation mode.
• If an error occurs, recover the refrigerant from service port.
9-3. Pump down
PUMP
POWER
ERROR
DOWN
MODE (L1)
● ○ ●
Step (4)
Closing direction
Hexagon wrench
Liquid pipe
PUMP
POWER
ERROR
DOWN
MODE (L1)
● ○ ●
PUMP
POWER
ERROR
DOWN
MODE (L1)
○ ○ ○
- 298 -
LOW PEAK
NOISE CUT
(L2) (L3) (L4) (L5)
○ ○ ○ ○
Step (5)
Closing direction
Gas pipe
LOW PEAK
NOISE CUT
(L2) (L3) (L4) (L5)
○ ○ ○ ○
LOW PEAK
NOISE CUT
(L2) (L3) (L4) (L5)
○ ○ ○ ○
(L6)
●
(L6)
○
(L6)
○
9. Check and test