Climate Controls ing the right side of the temperature up/down switch for five seconds. The current error status will be shown on the LED display. Press the right side of the temperature up/down switch again repeatedly to scroll the display through any existing error codes. If an error code is displayed, contact your Western Star dealer for service. 2 3 4 5 1 6 Modes Recirculation Mode 02/06/2003 f610641 1. Face Mode (recirculating air) 2. Face Mode (fresh air) 3. Bi-Level Mode 4. Floor Mode 5. Floor and Defrost Mode 6. Defrost Mode WARNING Do not use the recirculation mode when the heater is on and the vehicle is in motion.
Driving with the recirculation mode on while the heater is on may cause the windows to be obscured by moisture or ice, which could result in an accident possibly causing personal injury or property damage. Fig. 5.3, Mode Control Switch Settings the air conditioner on or off. When the air conditioner is on, the A/C switch illuminates. Do not use the recirculation mode for more than 20 minutes at a time because the air inside the cab may become stuffy and the windows may become obscured by moisture, which could re- sult in an accident possibly causing personal in- jury or property damage. IMPORTANT: Operate the air conditioner at least five minutes each month, even during cool weather.
This helps prevent drying and cracking of the refrigerant compressor seals and reduces the chance of refrigerant leaks in the system. When the mode control switch (see Fig. 5.3 ) is turned to the face mode using recirculating air, the air in the cab is recirculated through the heater and air conditioner system. This is the only mode that uses recirculated air. Fresh air, or outside air, is cir- culated through the heating and air conditioning sys- tem when any other mode is selected. LED Display, Vehicles With ATC Only The LED display shows the temperature to which the heater or air conditioner has been set in degrees Fahrenheit or degrees Celsius.
Changing Temperature Units The temperature units can be changed from Fahren- heit (°F) to Celsius (°C) or from Celsius to Fahrenheit by turning the ignition on, turning the fan switch off, and pressing and holding the left side of the tem- perature up/down switch for five seconds. The cur- rent temperature unit will then be shown on the LED display. Press the left side of the temperature up/ down switch again to toggle between °F and °C. Changing the temperature units on the cab climate control panel will also effect the sleeper climate con- trol panel.
The recirculation mode can be used to prevent dusty or smoky air from entering the cab, or to decrease the time required to cool or heat the cab interior dur- ing extreme outside temperature conditions. When the outside air is clear or the desired cab tempera- ture is reached, change the mode control switch to a fresh-air mode. The recirculation mode can be used when the air conditioner is on whether the vehicle is moving or not. Defrost Mode The defrost mode is used to deice, defrost, or defog the windows. Error Codes NOTE: When the defrost mode is on, the air conditioner is on.
The air conditioner is used to Error codes can be displayed by turning the ignition on, turning the fan switch off, and pressing and hold- 5.3