Справочник Пользователя для Liebert 3000

All critical information is stored in nonvolatile memory. Setpoints, setup parameters, and component 

run hours are kept inside the microcontroller in EEPROM. Information retained for the alarm history 

is kept in non-volatile RAM. 

Equipment options are selected and enabled using DIP switches 1 through 7. These are located at the 

upper left of the control board and are labeled SW1. Switch 1 is at the top. These switches are factory 

set and should not require any user changes. The setting and function of the switches can be read 

from the LCD display (see Show DIP Switches on page 8 or the accompanying Table 4).

Active control outputs are indicated with LEDs on the lower section of the control board. Each LED is 

lit if the control output is active (on). The LEDs assist in troubleshooting the system. Refer to the fol-

lowing table.
Table 6

R5

Heat Rejection

LLSV

Liquid Line Solenoid Valve

HGBP

Hot Gas By-Pass or Compressor Unloader Valve

C1

Compressor

RH1

Reheat Stage 1, Hot Gas, Hot Water Reheat Solenoid or SCR Reheats

RH2

Reheat Stage 2

HUM

Humidifier

FAN

Main Fan

HMV

Humidifier Make-Up Valve

LLSV2

Part Coil Solenoid Valve