7-4. Outdoor Fan Speed Control
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 unit detects a change in temperature, the controller (POW-
CL128E) on the electrical component box activates to control the fan speed automatically.
●
If the outdoor temperature falls below 14°C, the fan speed switches to MED.
●
If the outdoor temperature falls below –1°C, the fan speed switches to LOW.
31
Outdoor
temperature
14
°
C
–1
°
C
Fan speed Fan motor output
HIGH
MEDIUM
LOW 7 1 (YEL-BRN)
3 1 (WHT-BRN)
5 1 (VLT-BRN)
(Line voltage 220-240V)
✽
1
✽
2
✽
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.
NOTE
