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Configuration
Installer and user reference guide
75
FXSA15~140A2VEB
VRV system air conditioner
4P599622-1 – 2020.05
Setting: External static pressure
INFORMATION
▪
The fan speed of the indoor unit is preset to ensure the standard external static
pressure.
▪
To set a higher or lower external static pressure, reset the initial setting with the
user interface.
Settings for external static pressure can be achieved in 2 ways:
▪
Using the airflow automatic adjustment function
▪
Using the user interface
To set external static pressure by airflow automatic adjustment function
NOTICE
▪
Do NOT adjust the dampers during the fan only operation for airflow automatic
adjustment.
▪
For the external static pressure higher than 100 Pa, do NOT use airflow automatic
adjustment function.
▪
If the ventilation paths have been changed, perform the airflow automatic
adjustment again.
▪
Test run MUST be done with a dry coil, run the unit for 2 hours with fan only to
dry the coil.
▪
Check if the power supply wiring, duct, air filter are properly attached. If the
closing damper is installed in the unit, make sure it is open.
▪
If there is more than one air inlet and outlet, adjust the dampers so that the
airflow rate of each air inlet and outlet is conform with the designed airflow rate.
1
Operate the unit in fan only mode prior to using the airflow automatic
adjustment function.
2
Stop the air conditioning unit.
3
Set the value number “—“ to 03 for
M
11(21) and
SW
7 and continue
according to the following table:
Setting content:
Then
(1)
M
SW
—
Airflow adjustment is OFF
11(21)
7
01
Press ON/OFF to return to normal operating mode.
Possible consequence:
The operation lamp will light up
and the unit will start the fan operation for airflow
automatic adjustment.
03
Operation stops after 1 to 8 minutes.
Possible consequence:
Setting is finished and the
operation lamp will be off.
02
4
After airflow automatic adjustment is finished check if the value number “—“
is set to 02. If there is no change, perform the setting again.
(1)
Field settings are defined as follows:
•
M
: Mode number –
First number
: for group of units –
Number between brackets
: for individual unit
•
SW
: Setting number
•
—: Value number
•
: Default