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b. Automatic airfl ow adjustment
CAUTION
• This function cannot be used when there is a booster fan between the ducts.
• Be sure that the static pressure is within the allowed range. Incorrect setting may
cause incorrect adjustment and may result in insuffi cient airfl ow or water leakage.
• When the external static pressure is changeable in the installation by use of
automatic changeable dampers, etc., set so that the external static pressure is the
lowest.
NOTE:
Be sure to conduct this setting before any other operation. If the motor is warm or the heat
exchanger is wet, false 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 fi lter (optional) is attached.
If there are several inlet, outlet ports, make sure the airfl ow rates of each port match the
designed airfl ow rate by adjusting the throttles.
Automatic airfl ow adjustment is possible by the following procedures.
1) Change the setting of Function 26 to "Automatic airfl ow 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.
During Automatic airfl ow adjustment, the mode will be fi xed at Fan mode (High).
When this function is active, do not operate the Outdoor unit.
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.
4) Turn the air conditioner off and on again.
5) Check the setting value of Function 26 and record the obtained setting value in the
following table.
* If the setting value has not changed, repeat the procedure from step 1.
Function Number
Setting value
26
CAUTION
• If the detected setting value is not within the range of static pressure, please check
and re-arrange the installation, then repeat the procedure from step 1. Incorrect
setting may result in insuffi cient airfl ow or water leakage.
• When the duct or outlet installations are changed after the Automatic airfl ow
adjustment is completed, repeat the procedure from step 1.
7. CHECK LIST
Pay special attention to the check items below when installing the indoor unit(s). After
installation is complete, be sure to check the following check items again.
Check items
Check box
Has the indoor unit been installed correctly?
Has there been a check for gas leaks (refrigerant pipes)?
Has heat insulation work been completed?
Does water drain easily from the indoor units?
Is the voltage of the power source the same as that indicated on the label
on the indoor unit?
Are the wires and pipes all connected completely?
Is the indoor unit grounded?
Is the connection cable the specifi ed thickness?
Are the inlets and outlets free of any obstacles?
After installation is completed, has the proper operation and handling
been explained to the user?
Operate the unit according to the operating manual provided, and check
that it is operating normally.
8. TEST RUN
8. 1. Check items
□
Is operation of each button on the remote control unit normal?
□
Does each lamp light normally?
□
Is the drain normal?
□
Do not have an abnormal noise and vibration during operation?
Do not operate the air conditioner in test run for a long time.
8. 2. Operation method
Depending on your installation, choose from the following:
■ By the wireless remote controller (with [TEST RUN] button)
• To start test run, press the [START/STOP] button and the [TEST RUN] button on the
remote controller.
• To end test run, press the remote controller [START/STOP] button.
■ By the indoor unit or IR receiver unit
• To start test run, press the [MANUAL AUTO] button of the unit for more than 10 seconds
(forced cooling).
• To end test run, press the [MANUAL AUTO] button for more than 3 seconds or press
the remote controller [START/STOP] button.
• The Operation indicator lamp and Timer indicator lamp will simultaneously fl ash during
the test run mode.
■ By the wired remote controller
• For the operation method, refer to the installation manual and the operating manual of
the wired remote controller.
Heating test run will begin in a few minutes when HEAT is selected by the remote controller
[reverse cycle model only].
9. FINISHING
Install the heat insulation material after performing a refrigerant leak check (see the
installation manual for the outdoor unit for details).
Coupler heat insulation
Coupler heat insulation
(Accessory)
No gaps
Be sure to overlap
the insulation.
Indoor unit side
(Gas and liquid pipes)
Cable ties (large)
Pipes
(Accessory)
CAUTION
There should be no gaps between the insulation and the product.
CAUTION
• After connecting the piping, check the all joints for gas leakage with gas leak detector.
• Once the pressure checking has been completed using nitrogen, please refer to the
outdoor unit installation manual to complete the evacuation process.
• Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to
do so may cause water leaks.
10. CUSTOMER GUIDANCE
Explain the following to the customer in accordance with the operating manual:
(1) Starting and stopping method, operation switching, temperature adjustment, timer, air
fl ow switching, and other remote controller operations.
(2) Cleaning and maintenance of the product, and other items such as air fi lters and air
louvers if applicable.
(3) Give the operating and installation manuals to the customer.
(4) If the indoor unit custom code is changed, and the installation includes a wireless
remote controller, inform the customer the changed code. (On some wireless remote
controllers, the custom code may return to A when batteries are replaced.)
En-15
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