PART III
IMPORTANT PARTS - MAIN CIRCUIT BOARD
E-18
Helpful hints
As long as the circuit board is working,
you need not to replace the main circuit
board transformer.
MAIN CIRCUIT BOARD
-Do not touch this area of circuit board with hand
when the unit is on, the voltage in this area is
120V ac. If not, electrical shock or personal
injury will occur.
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1
1. Red twin check
wire connection
4. Display circuit
board wire connection
2. Odor sensor
wire connection
Circuit board
reset button
Speaker
(Buzzer)
3. Negative ion
generator wire
connection
5. Fan motor cable
connection
9. Main circuit
board transformer
wire connection
6. UV lamp power
cord connection
1. Red twin wire: 12V ac from the
transformer to circuit board.
2. Blue twin wire: 110V ac from
circuit board to transformer.
8. Unit power cord
wire connection from
interlock switch
7. Power supply
transformer wire
connection
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1
Main circuit board and wire connections
The main circuit board is the most important parts of the unit. Pressing any buttons on the control panel will control the main
circuit board through the display circuit board wire for the unit to carry out the desired functions. There will no display lights or
incorrect display on the display panel if the display circuit board wire connections are loosened, the main circuit board or
display circuit boards are broken.
ENGLISH