Service Manual 141
Outdoor Units
(4) Compressor Discharge-Temp. Control
After 1 min. of normal control, if it is satisfied with fomula below, it starts to control of Comp. Discharge
Temp.
Cooling mode : The present degree of superheat ≤ 3 (Option)
Heating mode : The target degree of superheat < 0 , The present degree of superheat ≤ 0 (Option)
The present degree of superheat ≥ 0, The present degree of superheat ≤ 5 (Option)
❈ The target degree of superheat is decided for indoor_unit and operation mode.
❈ The target Temp. of discharge pipe is decided for indoor_unit, outdoor_unit and Comp operation Step, the
difference indoor and outdoor.
1.4 Fan control
1) STANDARD STEP : Stop, Operation (2 Step)
2) Phase control : The low Temp.of outdoor (=Cooling), The high Temp. of outdoor
(=heating)
→ Control fan On/Off, or Decrease the volume of fan's wind.
(1) COOLING
(2) HEATING
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