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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.
Remove the screw on the electrical component box and remove the
cover plate.
1
Adjust the DIP switch(SW03) on the main PCB to the “OFF” position.
2
Switch No.
K3
Switch Position
ON
OFF
Function
Normal speed
High speed
Increasing Fan Speed
E-
16
K1 K2 K3 K4
SW03
Re-install the cover plate and join the removed screw.
3