Sanyo C3082, C3682 service manual Noise Reducing Control Outdoor Unit, Operation Sound

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.

NOTE When this function is used, the cooling ability is slightly degraded. Therefore, when this function is to be enabled, make sure to receive the approval of the client.

<Operation Sound>

Specifications	Noise Reducing Control
	(Fan's motor speed : 500rpm)
Cooling	Cooling
55 dB-A	47 dB-A

<In Cooling Operation>

Outdoor Air Temp. [°C]

	Normal Operation
33
	Normal Operation or
	Noise Reducing Operation is kept.

28(Initial setting is the normal operation.)

Noise Reducing Operation

NOTE 1. In the test operation, high-power operation, defrost operation or low ambient cooling operation (to be cancelled at the outside temperature of 14 °C or less, or 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)

Control P.C.Board Inspection panel

Slide downward

Power lamp

SW01

Fig.3 Control P.C.Board

ON

1 2

Dip switch (SW01)

Fig.2 View from front

33