Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Service Manual download pdf (Page 20)

Operation Section

6.2 Basic Operation of The Office Pro 60 Electrical Circuit

• There are two basic components used to control the operation of the Office Pro 60 electrical

system:

- Control panel assembly

- Control box

• The control panel assembly contains the control panel, control board (with inputs for the freeze

and room temperature thermistors), drain switch, high pressure switch and a microprocessor.

(1) Fan mode

High Fan Mode

• When the FAN MODE button on the control panel is pressed, the microprocessor turns on “FAN

HI” “COOL OFF” indication of LCD and activates both the fan on relay and fan mode relay. This

sends line voltage (208/230 VAC) from the fan on relay to the N.O. (normally open) contacts of

the fan mode relay. This output is connected to the J8 terminal (relay board) where the high

speed wire of the fan motor is connected.

• When this button is pressed again, fan turns to low mode (see below). Press again, fan stops.

• High fan mode is automatically switched

depending on room temperature. When room

temperature is decreased down to 80 °F

(27 °C) or below, fan mode is switched to

HIGH. When room temperature is increased to

88 °F (31 °C) or higher, fan mode is switched

from HIGH to LO.

Low Fan Mode

• When the FAN MODE button on the control panel is pressed again, the microprocessor turns on

“FAN LO” “COOL OFF” indication of LCD and activates both the fan on relay and fan mode relay.

This sends line voltage (208/230 VAC) from the fan on relay to the N.C. (normally closed)

contacts of the fan mode relay. This output is connected to the J7 terminal (relay board) where

the low speed wire of the fan motor is connected.

• When this button is pressed again, fan stops.

I001914

80 °F

(27 °C)

Room Temperature

(High)

(LO)

Condenser Fan

88 °F

(31 °C)

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Movincool Office Pro 12 / Office Pro 18 / Office Pro 24 Service Manual Page 20