Liebert Challenger 3000

2.8.2 Non-Volatile MemoryOperation with Advanced Microprocessor ControlsAll critical information is stored in nonvolatile memory. Setpoints, setup parameters, and componentrun hours are kept inside the microcontroller in EEPROM. Information retained for the alarm historyis kept in non-volatile RAM.2.8.3 DIP SwitchesEquipment options are selected and enabled using DIP switches 1 through 7. These are located at theupper left of the control board and are labeled SW1. Switch 1 is at the top. These switches are factoryset and should not require any user changes. The setting and function of the switches can be readfrom the LCD display (see Show DIP Switches on page 8 or the accompanying Table 4).2.8.4 Control OutputsActive control outputs are indicated with LEDs on the lower section of the control board. Each LED islit if the control output is active (on). The LEDs assist in troubleshooting the system. Refer to the followingtable.Table 6 Control output LEDsLEDControl OutputR5 Heat RejectionLLSV Liquid Line Solenoid ValveHGBP Hot Gas By-Pass or Compressor Unloader ValveC1 CompressorRH1 Reheat Stage 1, Hot Gas, Hot Water Reheat Solenoid or SCR ReheatsRH2 Reheat Stage 2HUM HumidifierFAN Main FanHMV Humidifier Make-Up ValveLLSV2 Part Coil Solenoid Valve14