MovinCool Office Pro 63 Service Manual - Manual (Page 20)

Operation Section
20
6.2 Basic Operation of The Office Pro 63 Electrical Circuit
• There are three basic components used to control the operation of the Office Pro 63 electrical
system:
- Transformer
- 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 (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 (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)