Various Control - Fujitsu ASYG09KMCB Service Instruction

9. VARIOUS CONTROL

1. 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.
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 :
The pulse range of the electronic expansion valve control
Operation mode
Cooling / Dry mode
Heating mode
The expansion valve is set at 480 pulses 110 seconds after compressor stopped.
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).
2. TEST OPERATION CONTROL
Outdoor unit, may not operate, depending on room temperature.
In this case, keep on pressing the MANUAL AUTO button of
indoor unit for more than 10 seconds.
Operation indicator lamp and timer indicator lamp will begin
to flash simultaneously during cooling test run.
Then, heating test run will begin in about 3 minutes
when HEAT is selected by remote control operation.
To end test operation, press remote control START/STOP button.
3. PREVENTION TO RESTART FOR 3 MINUTES (3 MINUTES ST)
Compressor won't enter operation status for 140 seconds
after compressor is stopped, even if any operation is given.
4. 4-WAY VALVE EXTENSION SELECT
When air conditioner is switched from cooling mode to heating mode,
compressor is stopped, and 4-way valve is switched in 140 seconds later
after the compressor stopped.
Pulse range
between 12 and 480 pulses.
between 0 and 480 pulses.
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