10. PROCESSES AND FUNCTIONS

(4)Outdoor Fan Speed Control (CL1852) Low ambient fan speed control

This function protects the compressor from being damaged due to flowback of the liquid refrigerant to the compressor when the outdoor temperature is very low.

When the air temp. thermistor (TH) on the outdoor units detects a change in tem- perature, the controller on the electrical component box activates to control the fanspeed automatically.

If the outdoor temperature falls below 57°F, the fan speed switches to MED.

If the outdoor temperature falls below 30°F, the fan speed switches to LOW.

57°F

Outdoor temperature

30°F

 

Fan speed* 1

Fan motor output* 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH

 

 

3 1 (BLU–GRY) or (WHT–GRY)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MEDIUM

 

5 1 (VLT–GRY)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOW

 

7 1 (YEL–GRY)

 

 

 

 

 

(Line voltage 115V or 230V)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1893_M_I

Fig. 11

*1 Regardless of outdoor temperature, outdoor fan motor operates at first at HIGH speed for 23 ± 5 seconds to give the motor an initial boost.

*2 When the fan speed switches, the controller terminal’s location where line voltage comes out () shifts accordingly.

SM830079

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Sanyo CL1852, XS1852, C1852 service manual Medium

XS1852, CL1852, C1852 specifications

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