Welcome to Cooper&Hunter!
Today we’re cleaning our Sophia Series ceiling cassette unit.
Start by turning off electricity to the unit
Open the cassette grille, disconnect the wall thermostat, and remove the main board cover.
Use a multimeter to make sure no electricity is running to the unit
Disconnect the display and then remove the grille completely.
Next, disconnect the step motor.
Detach the panel by removing 4 screws.
Then disconnect it from the two hanging wires.
Remove the plug to drain any condensate that is currently stored in the unit.
When it’s completely drained, replace the plug.
Take a picture of the wiring for reference when reconnecting later.
Disconnect the communication wires.
Disconnect the ground wire.
Then disconnect the drain pump, the evaporator temperature sensor, the water level sensor,
and the fan motor.
Detach the entire inner panel and main board by removing 5 screws.
To remove the fan blower, loosen the nut with a wrench and remove it.
Spray the coil with coil cleaner.
Make sure to spray it thoroughly, covering the entire
evaporator, and leave it to break down the grime for at least 5 minutes.
While the coil cleaner sets on the evaporator, rinse your air filter, fan blower, and inner
panel.
Then spray and scrub thoroughly with coil cleaner before the final rinse.
To avoid getting the panel and grille too wet, it’s best to clean them with a cloth
or paper towel.
Then make sure everything is completely dry before heading back to the evaporator.
Scrub the coil thoroughly, brushing the cleaner and grime downwards towards the drain pan.
Once the coil is clean, rinse it with water until the coil cleaner is completely gone
Then remove the plug to drain it.
Replace the plug before reassembling the unit.
When replacing the fan blower, notice that the blower and attaching screw must align
on the flat side.
Slide the fan blower on, replace the washer and nut, and tighten with a wrench.
Replace the inner panel and main board.
Reconnect the evaporator temperature sensor, the water level sensor, the fan motor, and
the drain pump.
Then reconnect the ground wire and clip all the wires back into place.
Next, you can reference your wire connections photo and reconnect the wires in the same
order.
Reattach the panel to the hanging wires, and then replace the 4 screws that secure it to
the ceiling.
If necessary, adjust the ceiling tile manually by pushing it downward into place.
Connect the step motor.
Reattach the grill.
Then reconnect the display and wall thermostat.
Replace the main board cover.
Replace the air filter, tuck all the wires in, and close the grille.
Turn the electricity back on and your ceiling cassette is ready for use!
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