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Changing upward airflow DIP switch
Change the upward airflow DIP
switch (SW2-4) to “ON” to limit the
upward airflow.
1) Remove the front grille.
2) Switch the DIP switch (SW2-4)
on the PCB in the electrical
wiring box to “ON”.
CAUTION
• Be sure to turn on the upward airflow switch. Failure to do so may cause incomplete cooling/heating and formation of
condensation inside the house.
NOTE:
For installing indoor unit, attaching the connection pipe, connecting the drain hose and drain piping, wiring, when connecting
to a sub electrical wiring box, purging air, DIP switch settings based on installation site conditions, see exposed installation.
Testing
1.
Testing
1-1 Measure the supply voltage and make sure that it falls in the specified range.
1-2 Set the temperature of the water to a sufficient temperature for heating or cooling (6°C to 60°C).
1) Testing may be disabled in either mode depending on the room temperature.
2) After testing, set the temperature to a normal level (26°C to 28°C in cooling mode, 20°C to 24°C in heating mode).
1-3 The amount of
the unit’s
water circulation should be 3L/min to 15L/min.
CAUTION
• If a special heat exchanger has been incorporated into the unit, the water circulation should be within the range specified
for that product.
• If the water circulation is too low, sediment will collect due to stagnation. If too high, corrosion of the heat exchanger due to
the fast flow and abnormal sounds and pipe cracking due to vibration may occur.
• The maximum allowable pressure of the unit is 1.18MPa.
2.
Test items
Test items
Symptom
Check
Indoor unit is installed properly on solid bases.
Fall, vibration, noise
Water pipe and indoor drain hose extension are thermally insulated.
Water leakage
Draining line is properly installed.
Water leakage
System is properly earthed.
Electrical leakage
The specified wires are used for inter-unit wiring connections.
Inoperative or burn damage
Indoor unit’s air inlet or air outlet has clear path of air.
Incomplete cooling/heating
function
Indoor unit properly receives remote control commands.
Inoperative
Switch number
SW2-4
OFF
Set function
Use
Factory setting
Upward airflow limit
Switch to on for
embedded units
ON
OFF
ON
OFF
• How to set and use the switch
Upward airflow DIP switch
