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Liebert
3000 manual
Models:
3000
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Troubleshooting
6.4.9Compressor Replacement
Connecting the LT750
2.5.3Run Diagnostics
2.5Setpoints/Setup
1.2Start-UpProcedure
Alarm Descriptions
Adjustment
Setting options
Cleaning the Pan
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Contents
Precision CoolingFor Business-Critical Continuity
Liebert Challenger
Page
TABLE OF CONTENTS
3.8.1 Show Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.0 ALARM DESCRIPTIONS
7.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TABLES
FIGURES
Page
1.1.2GLYCOOL Chilled Glycol Cooling Systems
1.1System Descriptions
1.0INTRODUCTION
1.1.1Compressorized Systems
1.2Start-UpProcedure
Figure 1 Advanced microprocessor control panel
2.1Basics
Operation with Advanced Microprocessor Controls
Alarms Available
Compressor Overload Loss of Power
Custom Alarms 1 to 4 Programmed Alarm Messages
2.2Status Display
2.4Status/Alarm Data
2.4.1Active Alarms
2.4.3Alarm History Log
2.4.5Analog Sensors
2.5Setpoints/Setup
Table 1 Default setpoints and ranges
2.4.4Run Hours Log
Setup Operation
2.5.2Setup System
Select Options
Show DIP Switches
Setup functions, default values and ranges
DIP switch settings
Table
Setup Alarms
Alarm default time delays
Select Control Type
Humidity HUM Control Method
Standard Custom Alarm Messages
Analog Setup
Set Status Display
Calibrate Actuator
Test Control Board
2.5.3Run Diagnostics
Show Inputs
Test Outputs
2.8Control Circuit Board
2.5.4Change Passwords
2.6Date and Time
2.7Status Display
Table 6 Control output LEDs
2.8.3DIP Switches
2.8.2Non-VolatileMemory
2.8.4Control Outputs
3.1Basics
Page
3.2Status Display
3.4View/Set Alarms
3.4.1Active Alarms
3.4.2Alarm History Log
Table 7 Alarm default time delays
3.4.3Setup Alarms
3.4.6Setup Water Detect Floor Plan
3.4.4Setup Custom Alarms
3.5Operating Status
3.7System Setup
3.7.1Setup Operation
Default setpoints and ranges
IR Flush Overfill infrared humidifiers only
Default Settings and Ranges
Setup functions, default values and ranges
Auto Restart Delay
Table 10 Unit options
3.7.2Select Options
3.7.3Calibrate Sensors
3.7.4Calibrate Valve Actuator
3.7.7Set Status Display
3.8Run Diagnostics
3.7.8Change Passwords
3.7.6Select Humidity Sensing Mode
3.8.1Show Inputs
3.8.2Test Outputs
3.8.3Test Control Board
3.10Plot Graphs
3.8.4DIP Switches
Table 11 Setting options
3.9Date and Time
Slope
3.11.2Setup Analog Inputs
3.11.4Setup Digital Inputs
3.11.1Read Analog Inputs
3.13.1LCD Contrast
3.13Control Circuit board
3.12.1View 24 Hour Run Time History
3.12.2View Total Run Hours
Table 12 Control output LEDs
3.13.3DIP Switches
3.13.2Nonvolatile Memory
3.13.4Control Outputs
Intelligent Control Chilled Water only
4.1Temperature Control
4.1.1Cooling/Heating Required, in Percent %
PID Control Chilled Water or SCR Reheats only
Chilled Water Cooling
4.1.3Cooling Operation
GLYCOOL Cooling
Dual Cooling Source
Intelligent Control Chilled Water only
4.1.4Heating Operation Electric Reheat
Hot Water Reheat
PID Control Chilled Water or SCR Reheats only
4.3Control Types
4.2.4Humidification Operation System Activation
4.3.1Proportional Control
4.3.3Intelligent Control Chilled Water only
4.4.1Short Cycle Control
4.4Load Control Features
4.5Additional Features
4.5.1Connecting the Analog Sensors
Figure 5 Analog input jumpers
Installation—LT750DIP Switch Settings
Figure 6 Connecting the LT750
4.5.2Water Detection Display
Setup
Physical Connections
Calibration
Liebert Monitoring Devices and Software
4.6Communications
5.1Standard Alarms
5.0ALARM DESCRIPTIONS
5.1.1Change Filter
5.1.5High Humidity
5.1.3Custom Alarms
5.1.2Compressor Overload
5.1.4High Head Pressure
5.1.10Loss of Air Flow
5.1.9Humidifier Problem Infrared Humidifiers
5.1.11Loss of Power
Steam Generating Canister Humidifiers
5.2.3Standby GC Pump On
5.1.16Short Cycle
5.2.1Loss of Water Flow
5.2.2Smoke Detected
Cooling
6.0COMPONENT OPERATION AND MAINTENANCE
Fan Safety Switch
6.1.1Environmental Control Functions
Figure 7 Liebert leak detection units
Firestat
Smoke Detector
Water Detection Sensor
Remote Shutdown
6.2Filters
6.3.3Air Distribution
6.3Blower Package
6.3.1Fan Impellers and Bearings
6.3.2Belt
Table 18 Suction pressures
6.4.1Suction Pressure
6.4.2Discharge Pressure
6.4.3Superheat
6.4.5Hot Gas Bypass Valve Operation
Adjustment
Adjustment
6.4.4Thermostatic Expansion Valve Operation
6.4.6Air Cooled Condenser
Figure 9 Outdoor fan/condenser configuration
Regulating Valve
Figure 10 Johnson Controls valve adjustment
Figure 11 Metrex valve adjustment
Glycol Solution Maintenance
6.4.9Compressor Replacement
6.4.8Compressor Functional Check
Mechanical Failure
Electrical Failure
Compressor Replacement Procedure
Changing Humidifier Lamps
Cleaning the Pan
6.5.1Infrared Humidifier
Removing the Pan
6.5.2Steam Generating Humidifier
Autoflush Infrared Humidifier Cleaning System
Autoflush Operation
Autoflush Controls
Component Operation and Maintenance
Operation
Controls
When replacing the canister
Replacing the Canister
Table 20 Humidifier canister part numbers
Circuit Board Adjustments
Drain Tempering Feature
Figure 14 Canister replacement
7.0TROUBLESHOOTING
Table 21 Blower troubleshooting
Table 22 Chilled water troubleshooting
Troubleshooting
Troubleshooting
Troubleshooting
Table 24 Dehumidification troubleshooting
Table 25 Glycol pump troubleshooting
Table 26 Infrared humidifier troubleshooting
Troubleshooting
Troubleshooting
Table 28 Reheat troubleshooting
Blower Section
8.0MONTHLY MAINTENANCE INSPECTION CHECKLIST
Filters
Steam Generating Humidifier
Compressor
9.0SEMIANNUAL MAINTENANCE INSPECTION CHECKLIST
Filters
Blower Section
Semiannual Maintenance Inspection Checklist
Page
from
Ensuring The High Availability
0f Mission-CriticalData And Applications
that
