Electronic Expansion Valve Control; Test Operation Control; Prevent To Start For 3 Minutes (3 Minutes St) - Fujitsu AB F18LAT Series Service Instruction

1-10. 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 following values.
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.
(1) Pulse range of EEV
AO*A18/24LALL
AO*B18/24LALL
(2) The EEV is set up at 480 pulses when the compressor is stopped.
(3) Intialization (Input of 528 pulses toward closing direction) is operated under
the following condition.
* When the power is turned on.
* 4 hours has passed since the last initialization, and 3 minutes has passed after
the compressor stop.
(If 12 hours has passed since the last initialization, the compressor is compulsorily stopped.)

1-11. TEST OPERATION CONTROL

With Wired Remote Controller
Under the condition where the air conditioner stops, press the MASTER CONTROL button and
the FAN CONTROL button simultaneously for 2 seconds or more, and the test operation control
mode will appear.
During test running, "
Set the test operation mode, and the compressor will continue to run regardless of whatever
the room temperature sensor detects.
The test operation mode is released if 60 minutes have passed after setting up the test operation.
With Wireless Remote Controller
Under the condition where the air conditioner runs, press the TEST RUN button, and
the test operation control mode will appear.
During test running, the operation lamp and timer lamp of the air conditioner body twinkle simultaneously.
Set the test operation mode, and the compressor will continue to run regardless of whether the room
temperature sensor detects.
The test operation mode is released if 60 minutes have passed after setting up the test operation.
1-12. 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.
Operation Pulse range
Cooling/ Dry
60 480 pulse
Heating
" will display on the remote controller display.
01-17