Piping Diagram
Samsung Electronics 366
Drain Pump Control
▪ Purpose
Discharge the condensate stagnating in the indoor unit's drainage plate to prevent the condensate from overflowing
indoor units.
▪ Concept
If the amount of condensate stagnating in the drainage plate reaches a certain level where it may overflow, the Float soft-
ware detects this and activates the drain pump to discharge the condensate to the outside via the hose.
▪ Control specifications in detail
∙ Condition(s) required to use the mode : The Drain Pump Option is used, or the model name
(Rem_Opt) is set to 1-Way, 2-Way, or 4-Way
∙ Drain Pump ON : (Cooling or Auto cooling or Dehumidifying mode ON) and
(Outdoor Comp ON) and (Indoor unit Thermo-ON)
Thermo-ON
Thermo-OFF
Outdoor Comp ON
Outdoor Comp OFF
Detected by the Float S/W
Not detected by the Float S/W
Drain Pump ON
Drain Pump OFF
Cooling or Auto cooling or
Dehumidifying mode
∙ Drain Pump OFF : (Operation OFF) or (Indoor unit Thermo OFF)
Thermo-ON
Thermo-OFF
Outdoor Comp ON
Outdoor Comp OFF
Detected by the Float S/W
Not detected by the Float S/W
Drain Pump ON
Drain Pump OFF
If 3-min delay option (Rem_Opt) is on
Cooling or Auto cooling or
Dehumidifying mode
▪ Notes
The drain pump activates if the Float S/W operates in heating mode
Outdoor Comp ON
Outdoor Comp OFF
Detected by the Float S/W
Not detected by the Float S/W
Drain Pump ON
Drain Pump OFF
Cooling or Auto cooling or
Dehumidifying mode
7-3 Functions (cont.)
7-3-2-6 Indoor unit control (cont.)
7-3-2 Control (cont.)
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