Schematic Diagrams - Samsung IDH4400A Service Manual

7. Schematic Diagrams

7-1 Graph of air flow rate vs external static pressure
25
Limit line
20
15
10
5
0
20
How to Read Diagram
1. The vertical axis is the external static pressure(mmAq) while the horizontal axis represents the AIR
FLOW(m /min).
3
2. The characteristic curves for 'HH', 'H', 'Med', and 'Low' fan speed controller are shown.
3. The nameplate values are shown based on the 'H' air flow.
4. If external static pressure is too great, the air flow volume may drop too low as explained above.
HH : DIP Switch OFF position(High speed)
If external static pressure is too great(due to long extension of ducts, for example), the air flow volume may drop too
low at each air outlet. This problem can be solved by increasing the fan speed using the following procedure.
1. Remove the screw on the electrical component box and remove the cover plate.
2. Adjust the DIP switch(SW2) on the main PCB to the "OFF" position.
Switch No. Switch Position
5
Note: This air conditioner is tested under 14mmAq external static pressure.
Note: If you increase the fan speed, you can use the air conditioner under the external static pressure of 20mmAq maximally.
3. Re-install the cover plate and join the removed screw.
Samsung Electronics
(Without air filter)
HH
Limit line
H
M
L
25 30 35 40 44
Air Flow (m 3 /min)
H : At shipment(Normal speed)
Function
ON Normal speed
OFF High speed
(With air filter)
25
Limit line
20
HH
15 Limit line
10
H
5
M
L
0
20 25 30 35 40
Air Flow (m 3 /min)
44
7-1