Automatic Airflow Adjustment - Fujitsu ARYG72LHTA Service Instruction

1-21. COMPOMRESSOR SPEED CONTROL
When the detection value of outdoor temperature sensor is lower than temperature
in the table below, the compressor speed is controlled.
(Table 19 : Operation temperature of compressor speed control)
Operation temperature
Operation overview
Operation release

1-22. AUTOMATIC AIRFLOW ADJUSTMENT

The unit automatically sets the static pressure.
This setting can be used by the function setting 26.
The static pressure is calculated by the input current and voltage of the motor and
the return air temperature.
*For the setting method, refer to the technical manual.
NOTE
Be sure to conduct this setting before any other operation. If the motor is warm or the heat exchanger
is wet, false and detection may lead to incorrect adjustments.
Check if the electrical wirings and duct installations are complete.
If there is a damper installed in the system, make sure the damper is open.
Check if the air filter(optional) is attached.
If there are several inlet, outlet ports, make sure the airflow rates of each port match the
designed airflow rate by adjusting the throttles.
Automatic airflow adjustment is possible by the following procedures.
1) Change Function 26 to "Automatic airflow adjustment (32)".
2) Run the air conditioner on Fan mode (High).
* For instructions on how to operate the air conditioner, refer to the operation manual of the remote
controller.
Automatic During airflow ajustment, the mode will be fixed at Fan mode(High).
When this function is active, do not operate the Outdoor unit.
When the setting is performing, Test mode display: 3-Wire RC/ Maintenance dispaly: 2-Wire RC will be
shown on the remote controller panelle.
3) The air conditioner will run for about 1 to 8 min. then stop automatically.
* Do not change the throttles of the inlet and outlet ports during operation.
When used in a Group control system, the setting will take about 10 min.
When the Error code 15.4 (Automatic Air flow Adjustment Error) appears, the setting is not completed.
Refer to the Trouble shooting Error code15
4) Turn the air conditioner off and on again.
5) Check the setting value of Function 26 and take note of the setting value.
* If the setting value has not changed, repeat the procedure from step 2.
.
c
Temperature
Cooling Heating
- 20°C
120 rpm (Max)
more than - 15°C
01-22
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