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SERVICE MANUAL
Portable Air Condi oners
Drain Tank Switch
• The drain switch ac vates and stop the opera on of compressor motor
and fan motor when approximately 3.17 gal (12 L) of drain water
accumulates in the drain tank. At the same me, control panel display “FL”,
and compressor and fan opera ons stop. This system uses a 250 V, 0.1 A
ra ng micro switch for this func on.
• When approximately 3.17 gal (12 L) of drain water accumulates in the drain
tank, the drain tank base plate, which is supported at fulcrum (a), is pushed
down in the direc on of the arrow.
• When the drain tank base plate is forced down, “por on A”, located at the
top of the drain tank base plate, turns off micro switch contacts (1)-(2).
Evaporator
Drain Pan
Poron “A”
Spring
Drain Tube
Drain Water
Base
Drain Tank
Base Plate
a
Full Drain Switch
Poron “A”
Relay
Board
1
2
3
NC
COM
NO
C (1)
NC (2)
