Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Service Manual download pdf (Page 27)

Operation Section

6.7 Drain Switch

• The Office Pro 60 is equipped with a drain tank switch. When the drain tanks accumulates

approximately 8.0 gal (30 L) of condensate (water) in the drain tanks, the drain tank switch sends

a signal to the microprocessor. The microprocessor stops all operation of the unit, flashes the

"TANK FULL” LED, indicates "TANK FL” on the LCD and closes the contact of output signal.

• This system utilizes a 0.1 A, 125/250 VAC micro-switch for this function. When drain water

accumulates approximately 8.0 gal (30 L) in the drain tanks, the drain tank base plate, which is

supported at its fulcrum, is pushed down in the arrow direction as shown in the figure below.

• When the drain tank base plate is forced down, the top of the drain tank base plate turns off the

contacts #1-#2 of the micro switch. This causes the ground signal at the J103 connector of the

control panel assembly to go open. When the microprocessor detects this event, it shuts the unit

off, flashes the “TANK FULL” LED, indicates “TANK FL” on the LCD and closes the contact of

output signal.

• When the drain tanks is removed (or the drain tanks is emptied), the top of the drain tank base

plate returns to its original position from the tension of the coil spring. Then contacts #1-#2 of

the drain tank switch close. This provides a ground to the microprocessor through the J103

connector.

I002230

DS2

DS1

Evaporator

Drain Pan

Drain Tube

Drain Tanks

Fulcrum

Drain Water

Top Base Plate

Base Plate

Base

Drain Switch

Spring

To J103

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Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Service Manual Page 27