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TM 10-4110-262-13&P
0004 00
(3) Unit Operation / Cooling Mode Indicator Light
When this light is on, it indicates the unit is operating in either the cooling or heating modes. A green light
indicates the unit is in the cooling mode. A red light indicates the unit is in the heating mode. When the
unit is stopped by the thermostat, HPCO, or LPCO, the unit operation indicator light will be off and the ON
indicator will remain ON.
(4) Defrost Indicator Light
When this light is on, it indicates that the unit is in the defrost mode.
(5) Manual Defrost Key
Press this key to start the defrost cycle. The unit will not defrost unless the defrost termination switch is
closed and the evaporator coil temperature s below 36 F (2 C).
(6) Thermostat Dial
Turn this dial to adjust the thermostat setpoint.
NOTE
The thermostat dial will change the thermostat setpoint without pressing
the setpoint key.
(7) Setpoint Key
Press this key to make the thermostat setpoint appear on the digital display. The thermostat setpoint will
remain on the display for 10 to 15 seconds after the key is released. This gives the operator time to
adjust the thermostat setpoint.
(8) Setpoint Key Indicator Light
When this light is on, the display is indicating the setpoint temperature.
(9) AC Overload Indicator
When this light is on, it indicates that the overload relay has opened and the unit has been stopped. The
indicator must be reset by pressing the ON/OFF key after allowing the overload relay to cool.
(10) Digital Display
This display is active only when the unit is turned on. The thermometer reading (return air sensor
temperature) normally appears on the display. Pressing the setpoint key causes the thermostat setpoint
to appear on the display for 10 to 15 seconds.
(11) Celsius Indicator Light
When this light is on, it indicates that the temperature is being displayed in degrees Celsius (C).
0004 00-6

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