Electronic Expansion Valve Control; Test Operation Control; Prevent To Restart For 3 Minutes ( 3 Minutes St ); Four-Way Valve Extension Select - Fujitsu R410A Service Instruction

10. ELECTRONIC EXPANSION VALVE CONTROL

The most proper opening of the electronic expansion valve is calculated and controlled under the
present operating condition based on the Table 13.
The compressor frequency, the temperatures detected by the discharge temperature sensor,
the indoor heat exchanger sensor, the outdoor heat exchanger sensor,
and the outdoor temperature sensor.
( Table 13 : The pulse range of the electronic expansion valve control )
AOU18RLXFW1
AOU24RLXFW1
The expansion valve is set at 480 pulses after 120 seconds of stopping compressor.
At the time of supplying the power to the outdoor unit, the initialization of the electronic
expansion valve is operated (528 pulses are input to the closing direction).

11. TEST OPERATION CONTROL

[ Wireless remote controller ]
The outdoor unit may not operate depending on the room temperature.
In this case, press the test run button on the remote controller while the air conditioner is running.
To end test operation, press the remote controller START/STOP button.
(When the air conditioner is running by pressing the test run button, the OPERATION Lamp
and TIMER Lamp will simultaneously flash slowly.
[ Using the Wired remote controller (Option) ]
Stop the air conditioner operation.
Press the master control button and the fan control button simultaneously for 2 seconds
or more to start the test run.
Press the start / stop button to stop the test run.

12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )

The compressor won't enter operation status for 3 minutes after the compressor is stopped,
even if any operation is given.

13. FOUR-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 four-way valve is switched in 3 minutes later after the compressor
stopped.
Operation mode
Cooling / Dry mode between 52 to 480 pulses.
Heating mode between 40 to 480 pulses.
Cooling / Dry mode between 53 to 480 pulses.
between 40 to 480 pulses.
Heating mode
Pulse range
01-11