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Manual Liebert 3000

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  • Liebert 3000 - page 1

    Precision Cooling For Bu siness-Critical Con tinuit y Li eber t C ha l leng er ™ 3000 Operati on & Mainte nanc e Manu al - 3 & 5 T on, 50 & 60Hz ...

  • Liebert 3000 - page 2

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  • Liebert 3000 - page 3

    i T A BLE OF CONTENTS 1.0 I NTRODUCTI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 System Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1.1 Compressorized Systems . . . . . . . . . . ...

  • Liebert 3000 - page 4

    ii 3.7.1 Setup Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 3.7.2 Select Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.7.3 Calibrate Sensors . . . . . . . . . . . . . ...

  • Liebert 3000 - page 5

    iii 4.4.2 Sequential Lo ad Activation Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.5 Additional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.5.1 Connecting the Analog Sens ors . . . . . . . . . . . . . . . . . ...

  • Liebert 3000 - page 6

    iv 6.5 Humidifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 6.5.1 Infrared Humi difier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 6.5.2 Steam Generating Humidifie r . . . . . . . . . . ...

  • Liebert 3000 - page 7

    v FIGURES Figure 1 Advanced microprocessor contro l panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2 Advanced microprocessor (A) control for Challenger 3000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3 Advanced microprocessor wi th graphics (G) control pane ...

  • Liebert 3000 - page 8

    vi ...

  • Liebert 3000 - page 9

    Introd uction 1 1.0 I NTRODUCTION 1.1 System Descriptions Challenger 30 00 ™ Liebert environmental control systems ar e available in several configu rations. Each configuration can operate with eith er Adva nced Microprocessor Controls (A), or Advanced Microprocessor Controls with Graphi cs (G). A brief description of each, including opera tional ...

  • Liebert 3000 - page 10

    Introd uction 2 1.2 St art-Up Procedure Before beginning start-up, make ce rtain that unit was installed acco rding to the instructions in the Installation Manua l. Verify that the fan shipping bolt has been removed, the check valve has been installed (o n air cooled units), a nd that the scroll compressor is rotati ng in the pr oper direction. All ...

  • Liebert 3000 - page 11

    Operation with Advanced Mic roprocessor Controls 3 2.0 O PERATION WITH A DVANCED M ICROPROCESSOR C ONTROLS The advanced microprocessor (A) control for your Li ebert Challenger 3000 unit features an easy-to- use menu driven LCD display. The menus, control feat ures, and ci rcuit board details are described in this section. For more co ntrol details, ...

  • Liebert 3000 - page 12

    Operation with Advanced Mic roprocessor Controls 4 Figure 2 Advanced micropr ocessor (A) control f or Challenger 3000 72°F 50%RH Cooling Dehumidifying No Alarms Present Status Al arm Data Active Alarms Operating St atus Alarm History Log Run Hours Log Setpoint Passw ord Setup Password Change Password View Setpoints Run Diagnostics Change Password ...

  • Liebert 3000 - page 13

    Operation with Advanced Mic roprocessor Controls 5 2.2 St atus Display The display normally sh own includes the present ro om temperature, humidity , active status func- tions (cooling, heating, dehu midifying, hum idifying), and active alarms. If no keys are pressed withi n 5 minutes, the syst em auto matically returns to the Status Displa y. The ...

  • Liebert 3000 - page 14

    Operation with Advanced Mic roprocessor Controls 6 2.4.4 Run Hours Log The total operating hours of all ma jor components in the unit can be monitored from the disp lay and are retained in nonvolatile memory. Ru n times are available for the following: • Compressor • GLYCOOL Coil (or CW Coil as used on Du al Cooling Unit) •F a n • (HUM) hum ...

  • Liebert 3000 - page 15

    Operation with Advanced Mic roprocessor Controls 7 2.5.2 Setup System The Setup System menu includes the foll owing selections: • SETUP OPERATION • SELECT OPTIONS • CALIBRATE SENSORS • SHOW DIP SWITCHES • SELECT CONTROL TYPE (Chilled Wate r or SCR Reheats only) • SETUP ALARMS • HUM CONTROL METHOD • ANALOG SETUP • SET STATUS DISPLA ...

  • Liebert 3000 - page 16

    Operation with Advanced Mic roprocessor Controls 8 Table 2 lists the setup fun ctions, their factory default val ues and the allowable prog ramming ranges. Select Options The following table lists op tions which should match the options installed with yo ur unit and shoul d not need to be ch anged during norma l operation. Calibrate Sensors The tem ...

  • Liebert 3000 - page 17

    Operation with Advanced Mic roprocessor Controls 9 Select Control T ype • Intelligent (Ch illed Water only) • Proportional (all unit types) • Tunable PID (Chilled Water or SCR Reheats only) The type of system control method used by the mi croprocessor can be selecte d from the front panel. The default setting is Intelligent , which approximat ...

  • Liebert 3000 - page 18

    Operation with Advanced Mic roprocessor Controls 10 Enable Alarms —Each individual alarm can be selected to be ENABLED (annunciated audibly, visu- ally, and communicated to a Site Prod ucts System) or DISABLED (ignored) . Enable Common Alarm —Each individual alarm can be select ed to energize or to not energize the common alarm relay. If the en ...

  • Liebert 3000 - page 19

    Operation with Advanced Mic roprocessor Controls 11 Analog Setup For installation of analog senso rs, see 4.5.1 - Connecting the Analo g Sensors . After selecting a compatible sensor and properly wiri ng it to the terminals, set up the control to mon- itor the sensor as follows : Slope —The slope is a multiplier used to scale the inpu t signal. T ...

  • Liebert 3000 - page 20

    Operation with Advanced Mic roprocessor Controls 12 2.5.3 Run Diagnostics By selecting Run D iagnostics, main tenance personnel can check system inputs, outputs, and complete a test of the microcontroller circuit board, all from the front panel. Review of the system inputs and the microcontroller test ca n be done without interrupting normal operat ...

  • Liebert 3000 - page 21

    Operation with Advanced Mic roprocessor Controls 13 2.5.4 Change Passwords The display prompts y ou to enter a three digit passw ord when making changes. The system includes two (2) passwords, one for setpoint s and one for setup. The system al lows the passwords to be changed by first entering the pr esent password, factory set as “123” for se ...

  • Liebert 3000 - page 22

    Operation with Advanced Mic roprocessor Controls 14 2.8.2 Non-V olatile Memory All critical in formation is stored in nonvolatile memory. Se tpoints, setup paramet ers, and component run hours are kept inside the microcontroller in EEPROM. Information retained for the alarm history is kept in non- volatile RAM. 2.8.3 DIP Switches Equipment options ...

  • Liebert 3000 - page 23

    Operation with Adva nced Microprocessor with Graphics Cont rol 15 3.0 O PERATION WITH A DVANCED M ICROPROCESSOR WITH G RAPHICS C ONTROL The advanced microprocessor with gr aphics (G ) control for your Lie bert Challenger 3000 un it features an easy to use, menu driv en LCD Graphics Display. Th e menus, control features, and circuit board details ar ...

  • Liebert 3000 - page 24

    Operation with Adva nced Microprocessor with Graphics Cont rol 16 Figure 4 Advanced micropr ocessor with graphics control menu * Select Control Algorithm av ailable on Chilled Water only ** optional *** Himod units only Date and Time Analog/ Digital Inputs Plot Graphs View/Set Ala rms Operating Statu s View/Set Control Setpoints Setu p Sy stem Run ...

  • Liebert 3000 - page 25

    Operation with Adva nced Microprocessor with Graphics Cont rol 17 3.2 St atus Display The normal status screen is divi ded into two sections, a right ha lf and a left half. The left half displays the return air temperat ure and humidit y readings in large characters. The right half of the screen is divide d into four quadrants (top to bottom). In t ...

  • Liebert 3000 - page 26

    Operation with Adva nced Microprocessor with Graphics Cont rol 18 3.4.3 Setup Alarms The list of alarms may be review ed using the UP/DOWN keys. Any al arm may be selected to have it's parameters modified by pressing the ENTER key. All alar ms have a time delay and alarm type parameter. The high/low temperat ure and humidity alarms also have a ...

  • Liebert 3000 - page 27

    Operation with Adva nced Microprocessor with Graphics Cont rol 19 3.4.4 Setup Custom Alarms Selecting SETUP CUSTO M ALARMS will step to the followi ng menu: • SETUP CUSTOM ALARM TEXT • CHANGE CUSTOM TEXT 1 • CHANGE CUSTOM TEXT 2 • CHANGE CUSTOM TEXT 3 • CHANGE CUSTOM TEXT 4 The custom alarm messages ca n be selected from a list of standar ...

  • Liebert 3000 - page 28

    Operation with Adva nced Microprocessor with Graphics Cont rol 20 3.5 Operating S t atus The Operatin g Status is intended to pr ovide the us er with displayed in formation about what the con- trol is calling for the system to do. For example: The display indi cates the chilled water valve is 68% ope n. On a new call for cooling, it takes several s ...

  • Liebert 3000 - page 29

    Operation with Adva nced Microprocessor with Graphics Cont rol 21 Auto Rest art Delay This feature allows for the unit to restart automa tically after a loss of power. The programmed value is . 1 m in ut e (6 se c on ds ) interv als. A programmed value of zero (0) would require the user to manually press the ON/OFF switch to start the unit, i.e. no ...

  • Liebert 3000 - page 30

    Operation with Adva nced Microprocessor with Graphics Cont rol 22 3.7.2 Select Options The following table is a list of options which should match the opti ons installed with your unit an d should not need to change during normal operation. 3.7.3 Calibrate Sensors The temperature and humidity sensors can be cali brated by selecting this men u item. ...

  • Liebert 3000 - page 31

    Operation with Adva nced Microprocessor with Graphics Cont rol 23 3.7.6 Select Humidity Sensing Mode The user may select betw een RELATIVE (direct) and ABSOLUT E (predictive) humidity con trol. If relative is selected, th e RH control is taken directly from the RH sensor. If absolute is selected, the RH control is automaticall y adjusted as the ret ...

  • Liebert 3000 - page 32

    Operation with Adva nced Microprocessor with Graphics Cont rol 24 3.8.1 Show Input s With the unit on and the fan running, the input state for th e following devices may be di splayed: • Air Sail Switch: normally off unless Loss of Air Alarm is active • Custom Alarm #1: no rmally off unless this ala rm is active • Custom Alarm #2: no rmally o ...

  • Liebert 3000 - page 33

    Operation with Adva nced Microprocessor with Graphics Cont rol 25 3.8.4 DIP Switches The DIP switch settings can be reviewed from the display panel. Changin g the DIP switches requires opening the front pa nel for access to the DIP switches on the microprocessor control board. These selections should match opti ons installed on your unit and should ...

  • Liebert 3000 - page 34

    Operation with Adva nced Microprocessor with Graphics Cont rol 26 3.1 1 Analog/Digit al Inputs Selecting ANALOG/DIGITAL INPUTS steps to the fo llowing menu: • READ ANALOG INPUTS • SETUP ANALOG INPUTS • READ DIGITAL INPUTS • SETUP DIGITAL INPUTS 3.1 1.1 Read Analog Input s The four (4) analog sensor inputs can be monitored from the display. ...

  • Liebert 3000 - page 35

    Operation with Adva nced Microprocessor with Graphics Cont rol 27 3.12.1 Vie w 24 Hour Run Time History The history of each load for every hour during the pas t 24 hours is displayed in the run hour history. The percentage of each hour that the load was on is displayed from 0 to 100% in increments of 5% or 3 minutes. Loads with a va riable output a ...

  • Liebert 3000 - page 36

    Operation with Adva nced Microprocessor with Graphics Cont rol 28 3.13.2 Nonvolatile Memory All critical in formation is stored in nonvolatile memory. Se tpoints, setup paramet ers, and component run hours a re kept inside the mi crocontroller in EEPROM. Informat ion retained for data loggi ng, 24 hour component run hour graphs, alarm history, an d ...

  • Liebert 3000 - page 37

    System Performance with Advanced Mic roprocessor Controls 29 4.0 S YSTEM P ERFORMANCE WITH A DVANC ED M ICROPROCESSOR C ONTROLS Th is s ec tio n p ro vid es det ai ls on h ow you r C hal le ng er 3 00 0 u nit re spo nd s t o us er inp ut s an d r oo m co n- ditions. Refer to this section when y ou need specific i nformation. This section includes d ...

  • Liebert 3000 - page 38

    System Performance with Advanced Mic roprocessor Controls 30 4.1.3 Cooling Operation 1-Ste p Cooling, Compressorized Direct Exp ansion (DX) Systems Cooling activates when the temperature control calc ulates a requirement for cooling of 100%. It is deactivated when the cooling requirement drop s below 50%. The hot g as bypass is energized on a call ...

  • Liebert 3000 - page 39

    System Performance with Advanced Mic roprocessor Controls 31 4.1.4 Heating Operation Electric Reheat The two heat stages are activated when the temper ature control calcul ates a requirement of 50% and 100%, respectively. Each stage is deacti vated when the heat requirement is 25% less than the activa- tion point. Hot W ater Reheat The solenoid v a ...

  • Liebert 3000 - page 40

    System Performance with Advanced Mic roprocessor Controls 32 4.2.4 Humidification Operation System Activation The humidifier (infrared or steam) is activ ated when the humidity control calculates a requirement of 100% humidificati on, and deactivated when the requirement falls below 50%. 4.3 Control T ypes 4.3.1 Proportional Control This is a stand ...

  • Liebert 3000 - page 41

    System Performance with Advanced Mic roprocessor Controls 33 A suggested tuning procedure is as follows: 1. Initially adjust the integral and derivati ve settings to 0%/ degree-min and 0% /degree/min. 2. Starting with 20% /degree, adjust the proportional setting in small increments (10% steps) until the control sustains a constant hunting action (t ...

  • Liebert 3000 - page 42

    System Performance with Advanced Mic roprocessor Controls 34 4.4 Load Control Features 4.4.1 Short Cycle Control The control system monitors the compressor and prev ents it from turning on within 3 minutes of being turned off. If this (on, off, on) occurs too often, 10 times in one hour, a Short Cycle alarm could occur. 4.4.2 Sequential Load Activa ...

  • Liebert 3000 - page 43

    System Performance with Advanced Mic roprocessor Controls 35 Figure 5 Analog input jumpers 4.5.2 W ater Detection Display The water detection display is designed to graphica lly display the location of water under a raised floor when connected to an LT750 water detection system. The graphica l floo r plan screen shows a 30 x 16 grid. E ach square r ...

  • Liebert 3000 - page 44

    System Performance with Advanced Mic roprocessor Controls 36 Physical Connections Figure 6 shows the 4-20 m A output of LT750 connected to Anal og Input #1 ( 41 and 42) on the exter- nal inputs terminal strip. This strip is provided on uni ts ordered with analog inputs. (If this strip is not installed, there is a field ins tallation ki t avai lable ...

  • Liebert 3000 - page 45

    System Performance with Advanced Mic roprocessor Controls 37 4.6 Communications The control system uses a two-wire, RS-422 channe l to communicate with remo te monitoring systems via Liebert Site Products. This communication, direct ly out of the control, uses a pro prietary protocol. Your unit can have a variety of different Site Prod uct devices ...

  • Liebert 3000 - page 46

    Alarm Descriptions 38 5.0 A LARM D ESCRIPTIONS The Advanced Microprocessor (A) and the Advanced Microprocessor with Graphics (G) Control sys- tems will audibl y and visually annun ciate all ENABL ED alarms, includin g the four custom alarms. With the Advanced & Advanced with Graphics Co ntrols, the customer alarms can be from the optional alarm ...

  • Liebert 3000 - page 47

    Alarm Descriptions 39 5.1.2 Compressor Overload An optional tri-block overload device can be used fo r the compressor. Compressor overload may be manual or automatic reset, dependi ng on your mode l. Overload is l ocated at the ele ctric connection box on the compressor . 5.1.3 Custom Alarms Custom alarm messages are progra mmed at the LCD display. ...

  • Liebert 3000 - page 48

    Alarm Descriptions 40 5.1.8 High T emperature and Low T empera ture (Simulta neously) If these two alarms are displayed at the same time, the temperature input signal is lost (or the humidity is out of sensor range: 15 to 8 5% RH). Dashes will be display ed for the temperature reading. The control system will initiate 100% cooling. Check for a disc ...

  • Liebert 3000 - page 49

    Alarm Descriptions 41 5.1.16 Short Cycle On compressorized systems, if the compressor has exceeded 10 coolin g starts in one hour or if the compressor has cycled five times in 10 minutes on the low pressure switch during non-cooling, the Short Cycle alarm will occur. This can be caused by low refrigerant le vel (but not low enough to acti- vate Low ...

  • Liebert 3000 - page 50

    Componen t Operatio n and Maintenance 42 6.0 C OMPONENT O PERATION AND M AINTENANCE 6.1 System T esting 6.1.1 Environment al Control Functions The performance of all control circuit s can be tested by actuating each of the main functions. This is done by temporarily ch anging the setpoints. Cooling To test the cooling functi on, set the set point f ...

  • Liebert 3000 - page 51

    Componen t Operatio n and Maintenance 43 Firest at The optional fire stat is a bimetal operated sen sing device with a normally cl osed switch. This device will shut down the entire unit wh en the inlet air temperature exceed s a preset point. It is connected between terminals 1 and 2 at plug P39. Smoke Detector The optional smoke detector power su ...

  • Liebert 3000 - page 52

    Componen t Operatio n and Maintenance 44 The zone leak detection kit provides leak detection for a define d zone. This kit is ideal for perimeter sensing or serpentine coverage of small areas. A simple, two-wire co nnection signals the alarms at a Liebert environmental unit or at a monitoring pane l. Run wires to the Liebert unit and connect them t ...

  • Liebert 3000 - page 53

    Componen t Operatio n and Maintenance 45 6.3 Blower Package Periodic checks of the blower package include: belt, motor mounts, fan bearings, and impellers. 6.3.1 Fan Impellers and Bearings Fan impellers should be periodically inspected an d any debri s removed. Check to see if they are tightly mounted on the fan shaft. Rotate the impellers and make ...

  • Liebert 3000 - page 54

    Componen t Operatio n and Maintenance 46 6.4 Refrigeration System Each month, the comp onents of the refrig eration system should be inspected for proper function and signs of wear. Since, in mo st cases, evidence of malf unction is present prior to component failure, peri- odic inspections can be a major factor in the preve ntion of most system fa ...

  • Liebert 3000 - page 55

    Componen t Operatio n and Maintenance 47 6.4.4 Thermost atic Exp ansion V alve Operation The thermostatic expansion valve perfor ms one function. It keeps the evapo rator supplied with enough refri gerant to satisfy load con ditions . It does not effect compressor operation. Proper valve operation can be determ ined by measuring superheat. If too l ...

  • Liebert 3000 - page 56

    Componen t Operatio n and Maintenance 48 6.4.6 Air Cooled Condenser Restricted airflow through the conden ser coil will reduce the operatin g efficiency of the unit and can result in high compressor head pressure and loss of cooling. Clean the condens er coil of all debris that will inhi bit air flow. This can be done with compressed air or commerc ...

  • Liebert 3000 - page 57

    Componen t Operatio n and Maintenance 49 6.4.7 W ater/Glycol Cooled Condensers Coaxial Condenser Each water or glycol cooled module has a co axial condense r w hich consists of a steel outside tube and a copper inside tube. Coaxial condensers do not normally require maintenance or replacemen t if the wa ter su pply is clean. If your system ope rate ...

  • Liebert 3000 - page 58

    Componen t Operatio n and Maintenance 50 High Pressure V alve - 350 PSIG System (2413 kPa) for 3 T on Unit s (Metrex V alve) Adjustment —The valve may be adju sted using a 1/8" di ameter rod. Turn ad justing collar nut cou n- terclockwise to raise head pressure. Turn it clockwise to lower head pressure. Rotation directions are as viewed from ...

  • Liebert 3000 - page 59

    Componen t Operatio n and Maintenance 51 6.4.8 Compressor Functional Check The following diagnostic procedure should be use d to evaluate whether the compressor is working properly . 1. Proper v oltage to the un it should be verified. 2. The normal checks of motor winding continuity an d short to ground should be made to determine if the inherent o ...

  • Liebert 3000 - page 60

    Componen t Operatio n and Maintenance 52 Electrical Failure An electrical failure will be indicated by a distinct pungent odor. If a severe burnout has occurred, the oil will be black and aci dic. In the event that there is an elec trical failure and a complete burn out of the refrigerat ion compressor motor, the proper procedures must be performed ...

  • Liebert 3000 - page 61

    Componen t Operatio n and Maintenance 53 6.5 Humidifier 6.5.1 Infrared Humidifier During normal humid ifier operation, deposits of mineral sol ids will collect in the humidifier pan. This should be cleaned out periodica lly to ensure efficient operation. Each water supply has different char- acteristics, so the time interval between cleanings must ...

  • Liebert 3000 - page 62

    Componen t Operatio n and Maintenance 54 Autoflush Infrared Humidifier Cleaning System The autoflush system will periodically flush the hum idifier pan with water to prevent the buildup of water minerals due to saturation . Because water conditions vary, the amount of water flushing through the system may be pr ogrammed to match local needs. Water ...

  • Liebert 3000 - page 63

    Componen t Operatio n and Maintenance 55 Operation 1. During start-up, when the humi dity control calls for humidifica tion, the fill valve opens and allows water to enter the canist er. When the water leve l reaches the electrodes, current flows and the water begins to warm. The canister fills until the amperage reaches the setpoint and the fill v ...

  • Liebert 3000 - page 64

    Componen t Operatio n and Maintenance 56 Replacing the Canister Over a period of operation, the humidifier electrodes become coated with mineral solids. This coating insulates the electrodes and decre ases the current flow. To mainta in humidifier capa city, the water level slowly rises to expose fresh electrode. Even tually, the entire electrod e ...

  • Liebert 3000 - page 65

    Componen t Operatio n and Maintenance 57 Figure 14 Canister replacement Circuit Board Adjustment s Humidifier operation is governed by the humidi fier control board. Th is board is located on the right side of the hu midifier compartment. There are three potentiome ters mounted on the board. These pots can be used to adjust for extreme water conduc ...

  • Liebert 3000 - page 66

    Trou bleshooting 58 7.0 T ROUBLES HOOTING Use this section to a ssist in troubleshooting yo ur unit. Also refe r to 5.0 - Alarm Descriptions . Sug- gestions are grouped by product function for convenience. ! WARNING Only qualif ied personnel should perform service on these units. Lethal voltag e is present in some circuits. Use caution when trouble ...

  • Liebert 3000 - page 67

    Trou bleshooting 59 T able 23 Compressor and refrigeration syste m troubleshooting Symptom Possible Cause Check or Remedy Compressor will not start Power off Check main sw itch, fuses or CBs and wiring Current overload open Re-set units with overload option manually. Allow compressor to cool for internal overloads to reset. Loose electrical connect ...

  • Liebert 3000 - page 68

    Trou bleshooting 60 Flooding Defective or i mproperly set expansion valve Increase superheat or replace valve Evaporator fan motor or belt Correct problem or replace fa n motor and/ or belts. Low condensing pressure Check head pressure control device Slipping belts Inspect and adjust Low compressor capacity or inability to pu ll down system Compres ...

  • Liebert 3000 - page 69

    Trou bleshooting 61 T able 24 Dehumidification troubleshooting Symptom Possible Cause Check or Remedy No dehumidification Control not ca lling for dehumi dificat ion Check monitor status. Compressor contactor not pulling in See 6.4.8 - Compres sor Functional Check and Ta ble 23 . Compressor w on't run; fuse blown or CB tripped See 6.4.8 - Comp ...

  • Liebert 3000 - page 70

    Trou bleshooting 62 T able 27 Steam generating humidifier trouble shooting Symptom Possible Ca use Check or Remedy False canister full indicatio n Foaming Check drain valve to ensure that it drain s freely. Check and replace if defective. Check water supply. If commercially softened, reconnect to raw water supply. If connected to hot water reconnec ...

  • Liebert 3000 - page 71

    Trou bleshooting 63 Excessive arcing in the canister Drain valve clogged or defective Verify that drain valve operates freely when activated. Clean valve and replace coil or valve if defective. Flush canister several times and replace if arcing persists. Improper water supply If water is commercially softened, reconnect humidifier to raw water supp ...

  • Liebert 3000 - page 72

    Monthly Maintenance Inspection Checklist 64 8.0 M ONTHLY M AINTENANCE I NSPECTION C HECKLIST Date:___________ _________________ ___________ Prepared by:__ ____________________ ___________ Model #:_____________ _____________________ ___ Serial #:_______________________ _____________ Filters ___ 1. Restricted air flow ___ 2. Check filter switch ___ 3 ...

  • Liebert 3000 - page 73

    Semiannual Maintenance In spection Checklist 65 9.0 S EMIANNUAL M AINTENANCE I NSPECTION C HECKLIST Date:___________ _________________ ____________ Prepared by:__ ____________________ ___________ Model #:_____________ _____________________ ___ Serial #:_______________________ ______________ Filters ___ 1. Restricted air flow ___ 2. Check filter swi ...

  • Liebert 3000 - page 74

    Semiannual Maintenance In spection Checklist 66 ...

  • Liebert 3000 - page 75

    ...

  • Liebert 3000 - page 76

    Ensuring The Hi gh Av aila bilit y 0f Mission-Critic al Dat a And Appli c ations. Emerson Net work P ower , the global leader in enabling business-critical continuity , ensures net work resiliency and adaptability through a family of technologies—inc luding Lieber t pow er and cooling technologies—that prot ect and suppor t business-critical sy ...

Manufacturer Liebert Category Air Conditioner

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Liebert 3000 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Liebert 3000.

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5. FAQ - Frequently Asked Questions
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