Movincool Office Pro 10 Service Manual download pdf (Page 22)

ELECTRICAL SYSTEM

RELAY BOARD FUSE

RELAY BOARD

EVAPORATOR FAN

MOTOR CAPACITORS

MAIN WIRE HARNESS

(WIRE ASSEMBLY

TERMINAL BLOCK

DIP SWITCH

CONDENSER FAN

MOTOR CAPACITOR

COMPRESSOR

CAPACITOR

Control Box

1. Basic Operation of Office Pro 10 Electrical Circuit

There are two basic components used to control the operation of the Office Pro 10 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, and a microprocessor.

A. Fan “Only” Mode (Evaporator)

Low Fan Mode - When the “Low” Fan Mode button on the control panel is pressed, the microprocessor

turns on the button’s LED and activates the Fan “On” Relay (Relay Board), sending line voltage

(115 VAC) to the N.C. (Normally Closed) contacts of the fan “mode” relay. This output is connected to

the J5 terminal (relay board) where the LOW SPEED wire of the fan motor is connected.

Note: Low fan mode does not operate in Fan “Only” mode.

High Fan Mode – When the “High” Fan Mode button on the control panel is pressed, the microproces-

sor turns on the button’s LED and activates both the Fan “On” Relay and Fan “Mode” Relay. This sends

line voltage (115 VAC) from the Fan “On” Relay to the N.O. (Normally Open) contacts of the Fan “Mode”

Relay. This output is connected to the J6 terminal (relay board) where the HIGH SPEED wire of the Fan

Motor is connected.

B. Cool Mode - In Addition to Fan “Only” Mode (as described above)

When the Cool On/Off button on the control panel is pressed, the microprocessor turns on the button’s

LED and if the Temperature Set Point is less than the current room temperature, this activates the

Compressor Relay (Relay Board) after a hundred and twenty (120) second delay. This sends line voltage

(115 VAC) to the J4 terminal (Relay Board) where the wire from the Compressor wire harness is con-

nected.

2. Control Box

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Movincool Office Pro 10 Service Manual Page 22