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11.2 Indoor Fan Motor Operation
11.2.1 Basic Rotation Speed
• Manual Fan Speed
o Fan motor’s number of rotation is determined according to remote control setting.
Remote control ○ ○ ○ ○ ○
Tab Hi Me+ Me Me- Lo
• Auto Fan Speed
o According to room temperature and setting temperature, indoor fan speed is determined automatically.
o The indoor fan will operate according to pattern below.
Fan Speed a b c d e f g h a b
Higher
Medium
Lower
[1 pattern : 10s]
• Feedback control
o Immediately after the fan motor is started, feedback control is performed once every second.
o During fan motor on, if fan motor feedback ≥ 2550 rpm or <50 rpm continuously for 10 seconds, the fan
motor error counter increased; fan motor is then stopped and restarted. If the fan motor error counter
increased to 7, then H19 – fan motor error is detected. Operation stopped and could not be restarted.
11.3 Outdoor Fan Motor Operation (For S9NK and S12NK)
Outdoor fan motor is operated with one fan speed only. Outdoor fan turns on when compressor starts to operate. But
outdoor fan will turns off 30 seconds after compressor stops to operate.
ON ON
Compressor OFF
ON Fan Speed ON
Outdoor Fan 30 sec OFF
11.4 Outdoor Fan Motor Operation (For S18NK and S22NK)
There is 2 speeds for outdoor fan motor. Outdoor fan speed can be changed to Hi or Shi according to outdoor
temperature. By default, the outdoor fan speed is set to Hi. For Cooling or Soft Dry operation, when outdoor
temperature reaches 100.4°F the outdoor fan speed is set to Shi, when outdoor temperature reduced to 98.6°F the
fan speed will set to Hi again. Outdoor fan will turns off 30 seconds after compressor stops to operate.
ON ON
Compressor OFF
ON Fan Speed ON
Outdoor Fan 30 sec OFF
(For S18NK and S22NK)
11.5 Airflow Direction
• There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by
vertical vanes).
• Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat
exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using
remote control).