Carrier HVAC Unit 50FCQA06

Remove screws from retaining rings in the top of the fan rotor

Remove screws connecting motor to stator flange

Remove stator limit switch on aluminum stator if required

Remove screws from the heat shield

Retain the heat shield if a new heat shield has not been ordered

Disconnect all auxiliary equipment from the controller

Notify the proper authorities if the duct detector is connected to a fire alarm system

Initiate the alarm state on the test/reset station

Check if the alarm state is indicated on the test/reset station

Reset the duct detector to normal state

Reconnect all auxiliary equipment to the controller

Turn off unit power, tag disconnect

Remove all screws from the top panel except the screws securing the condenser fan to the top panel

Lift and rotate the top panel at the condenser fan end and rotate the panel 90 degrees

Support the top panel so it remains level while resting on the condenser fan

Remove the compressor access panel to access the lower coil clip

Remove the condenser coil corner post if necessary

Remove the screws from both sides of the upper and lower coil retaining clips on the hairpin end of the coil tube sheets

Identify the location of the 2-Pin DIP switch near the center of the UCB

Set DIP Switch for 3 to 5 Ton Units

Set both DIP switches to 'OFF' (0) for 3 to 5 ton 50FCQ units

Set both DIP switches to 'ON' (1) for 6 ton 50FCQ units

Verify DIP switch positions against the unit's control label diagram

Press the controller’s test/reset switch for 2 seconds

Verify that the controller’s Trouble LED flashes

Ensure not to press the test/reset switch for longer than 7 seconds to avoid alarm state

Confirm that no unnecessary evacuation of the facility occurs