Panasonic CS-KE30NKU Technical & Service Manual page 37

Noise Reducing Control (Outdoor Unit)
The noise reducing control is the function used for silent operation of the air conditioner by means of
setting the dip switch on the outdoor unit P.C.Board to control the fan and compressor's motor speed.
When this function is used, the cooling or heating ability is slightly degraded. Therefore,
NOTE
when this function is to be enabled, make sure to receive the approval of the client.
<Operation Sound>
Specifications
Cooling Heating
55 dB-A 55 dB-A
<In Cooling Operation>
Outdoor Air Temp. °F(°C)
Normal Operation
91(33)
Normal Operation or
Noise Reducing Operation is kept.
(Initial setting is the normal operation.)
82(28)
Noise Reducing Operation
1. In the test operation, high-power operation, defrost operation or low ambient cooling
NOTE
operation (to be cancelled at the outside temperature of 57 °F(14 °C) or less, or 63 °F(17 °C) or
more), the noise reducing control is not available.
2. In the noise reducing operation, the fan's maximum motor speed is limited to 500rpm.
Also, the maximum frequency (Hz) is controlled in the cooling (30Hz) or heating
operation (30Hz).
<Switching Procedure to Noise Reducing Control>
(1) Remove the 3 screws fixing the inspection panel and remove the inspection panel. (Fig. 2)
(2) When the switch No. 1 of the dip switch (SW01) on the control P.C.Board is turned ON,
the noise reducing control is enabled. (Fig. 3)
Fig.2 View from front
Noise Reducing Control
(Fan's motor speed : 500rpm)
Cooling Heating
47 dB-A 47 dB-A
Outdoor Air Temp. °F(°C)
59(15)
50(10)
Control P.C.Board
Inspection panel
Slide downward
37
<In Heating Operation>
Noise Reducing Operation
Normal Operation or
Noise Reducing Operation is kept.
(Initial setting is the normal operation.)
Normal Operation
Power lamp
SW01
Fig.3 Control P.C.Board
ON
1 2
Dip switch (SW01)