Outdoor Fan Speed Control - Sanyo C1852 Service Manual

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.
temperature
1
* Regardless of outdoor temperature, outdoor fan motor operates at first at HIGH
speed for 23
2
* When the fan speed switches, the controller terminal's location where line voltage
comes out ( – ) shifts accordingly.
57 F
Outdoor
30 F
5 seconds to give the motor an initial boost.
Fan speed * 1 Fan motor output *
HIGH
3 – 1 (BLU–GRY) or (WHT–GRY)
5 – 1 (VLT–GRY)
MEDIUM
LOW 7 – 1 (YEL–GRY)
(Line voltage 115V or 230V)
Fig. 11
– 29 –
2
1893_M_I
SM830079