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8-4. Outdoor Fan Speed Control (CL×××× models only)
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 temperature, 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.
*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.
57°F
30°F
Outdoor
temperature
Fan speed
*
1
Fan motor output
*
2
(Line voltage 115V or 230V)
HIGH
MEDIUM
LOW
➂ – ➀ (BLU–GRY) or (WHT–GRY)
➄ – ➀ (VLT–GRY)
➆ – ➀ (YEL–GRY)
000-215 SM (1-56) 7/5/00 2:49 PM Page 43