Fujitsu AU*A12LALN Service Instruction page 50

5-13. 4-WAY VALVE EXTENSION SELECT
At the time when the air conditioner is switched from the cooling mode to heating mode,
the compressor is stopped, and the 4-way valve is switched in 3 minutes later
after the compressor stopped.
5-14. AUTO RESTART
When the power was interrupted by a power failure, etc. during operation, the operation contents
at that time are memorized and when power is recovered, operation is automatically resumed with
the memorized operation contents.
When the power is interrupted and recovered during timer operation, timer operation is canceled,
but only setting time is memorized.
[Operation contents memorized when the power is interrupted]
Operation mode
Set temperature
Set air flow
Timer mode and timer time
Thermistor detected position (When using the Wired Remote Controller)
5-15. PUMP DOWN ( For AU*A36/ 45LATN )
Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit.
When the product is stopped:
1. Press the PUMP DOWN switch (SW2) on the outdoor unit.
(The LED on the outdoor unit circuit board starts flashing (1sec.ON / 1sec.OFF repeated).)
2. The pump down operation (cooling operation) begins right away.
After operation starts, close the 3-way valve (liquid).
3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.
4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that
the LED has gone out.
When the product is operating:
1. Press the PUMP DOWN switch (SW2) on the outdoor unit. The LED on the outdoor unit circuit board starts
flashing (1sec.ON / 1sec.OFF repeated), and operation stops.
At this point, recovery has not been completed, so do not close the 3-way valves (liquid and gas).
2. The pump down operation (cooling operation) begins after 3minutes.
Close the 3-way valve (liquid) after operation starts.
3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.
4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that
the LED has gone out.
5-16. MANUAL AUTO OPERATION (When using the Wireless RC)
If MANUAL AUTO Button is set, the operation is controlled as shown in Table 10.
If the remote control is lost or battery power dissipated, this function will work without the remote
control.
(Table 10)
OPERATION MODE
SETTING TEMP.
FAN CONT. MODE
TIMER MODE
Auto changeover
24°C
Auto
Continuous
(No timer setting available)
05-16