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American Power Conversion FM, DX manual Group settings, Mode, Range, Share if

Models: DX FM

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Comm Loss Failover. Decide if the Group considers a System in the Comm Lost state to be in a failed state.

•Off—The Group will assume that the System is still operating normally.

•On—A backup System will be moved to the online state.

Caution: If Runtime Balancing is enabled, Comm Loss Failover must be On. Otherwise inadvertent System shutdowns may occur.

Name. Set the name of this Group. The Group name also appears in the interfaces.

Group settings

Path: Main > Setup > Group > Group Settings

The Group Settings define the load-sharing and System role-assignment functions of the Group.

Load Share. Enable or disable load-sharing requests for each mode. If load-sharing is disabled, Systems cannot send requests for assistance to the Group.

Load Share Thrshlds. Set the load-sharing thresholds for each mode. If the environmental temperature or humidity is outside the range determined by the setpoint and threshold, the System will generate a load-sharing request. Acceptable ranges for each mode are listed in the table below.

Mode	Range		Share if

Cool	0.0	–11.1°C (0.0–20.0°F)	Temperature > SetpointCool + ThresholdCool
Reheat	0.0	–11.1°C (0.0–20.0°F)	Temperature < SetpointReheat – ThresholdReheat
Dehumidify	0.0	–20.0% RH	Humidity > SetpointDehumidify + ThresholdDehumidify
Humidify	0.0	–20.0% RH	Humidity < SetpointHumidify – ThresholdHumidify

NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

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American Power Conversion FM, DX manual Group settings, Mode, Range, Share if

Contents

NetworkAIR FM DX Precision Air Conditioner 60 HzOperation, Maintenance, and Troubleshooting Page American Power Conversion Legal Disclaimer Page General Information SafetyOperation ContentsMechanical and Refrigeration Inspection Checklist Temperature alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Humidity alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Alarm delay Network Management Card MaintenanceWarranty TroubleshootingPage Modules, Systems, and Groups General InformationModule SystemGroup Symbols Used in this Manual SafetySafety symbols that may be used in this manual Cross-referencesymbols used in this manualLockout/tagout Safety HazardsElectrical hazards Static dischargeFunction OperationDisplay Interface Scrolling status screens Using the Display InterfaceStatus Screen Name Status Information DisplayedNavigating the interface Password entryMain menu screen Factory default settings Change settingsStart the System Stop the SystemCommissioning Power off Power On/Off ProcedurePower on Initial Inspection Checklist Commissioning ChecklistsMechanical and Refrigeration Inspection Checklist Electrical Inspection ChecklistEnsure that Ensure thatUser Interface Box Inspection Checklist Mechanical Inspection Air-cooledChecklistEnsure that Ensure thatWhile the equipment is operating, ensure that Start-upInspection ChecklistOwner Acceptance Final Inspection ChecklistEnsure that System options System ConfigurationPage Up Down System delays Building management Sensor setupFluid-CoilType Settings for fluid-cooledoptionsApplicable Settings Valve types Flow Switch Multi Cndsr Vlv 3-wayActuator types Coil Fluid 3-wayEcon Isolator Close Dly Econ Isolator Open Dly Econ Isolator Valve EnableEconomizer isolation valve optional Page Input contacts Contacts and RelaysDescription/Function Output relays Alarm detectors Module ConfigurationConfigure Module Calibrate airflow automatically Module ControlCalibrate airflow manually Set up humidifier Reset Variable Frequency DriveReset humidifier How the modes work Control the EnvironmentDX Dehumidify. Similar to DX cooling, the output for dehumidification is determined by the difference between the setpoint and the average return humidity from each of the Modules in the System if more than one Module is present. The deadband is used to engage both compressors incrementally with increasing demand. Each Module in the System is assigned an equal division of the deadband a percentage of relative humidity. Both compressors in a Module are engaged when the assigned division of the deadband above the setpoint is reached. If the average return humidity reaches the setpoint plus the entire deadband, all of the compressors will be engaged until the humidity drops below the setpoint plus the deadband. Unlike DX cooling, the compressors in each Module are normally set to work as a single unit instead of separately. The use of one or two compressors per Module is based on the Dehum. Capacity setting Path Main Menu Setup System # System Config System Options Setpoints Deadbands Two-ModuleSystem Cool Deadband Compressor AllocationTo set the dehumidify deadband for your System Essential functions ModesPID controls How to tune the PIDsControl PID Tuning CorrectionProportional IntegralTemperature alarms AlarmsHumidity alarms Maintenance intervalsAlarm delay Group configuration GroupMode Group settingsRange Share ifSystem failure events Password and time-out DisplayTemperature and pressure units Date and timeHow to update the firmware Adjust displayProduct data Reset to defaultsNetwork configuration Network ConfigurationModule status View Status ReadingsScrolling status screens Group status System statusPath Main Status System # Path: Main > Status > GroupView log View Event LogMajor or minor alarm LEDs Respond to AlarmsView active alarms Clear active alarmsAction Required Alarm messages and suggested actionsDisplayed Alarm Message Condensate Pump Fail Displayed Alarm MessageAction Required Action Required Displayed Alarm MessageEnv Temperature Low System Options Displayed Alarm MessageAction Required Humidifier Displayed Alarm MessageAction Required System Config System Options Displayed Alarm MessageAction Required Comm Lost state, or OffSupply Humidity High Displayed Alarm MessageAction Required System Comm Lost Displayed Alarm MessageAction Required Network Management Card Quick ConfigurationTCP/IP configuration methods OverviewPath Setup System Network Config APC Device IP Configuration WizardBOOTP and DHCP configuration A Vendor Class Identifier APC by default Remote access to the control console 1.Choose Network from the Control Console menu Control consoleOverview Access a Configured UnitWeb interface Telnet/SSHFTP/SCP SNMPRecover From a Lost Password Monthly Preventive Maintenance MaintenanceCleanliness EnvironmentElectrical MechanicalElectrical Quarterly Preventive MaintenanceMechanical Verify the following modes of operation Functional testsFull cooling Full reheat Humidification Dehumidification MultiCool EconomizerCleanliness Semi-AnnualPreventive MaintenanceMechanical ElectricalMeasure the refrigerant pressures Functional testsProblem TroubleshootingPossible Cause Corrective ActionPossible Cause ProblemCorrective Action Compressor fails toPossible Cause ProblemCorrective Action Compressor noisyPossible Cause ProblemCorrective Action Head pressure tooPossible Cause ProblemCorrective Action Suction pressure tooPage One-YearFactory Warranty WarrantyTerms of warranty Non-transferablewarrantyWarranty claims Parts Warranty ProceduresClaims Page Page APC Worldwide Customer Support 990-3127990-3127 10/2007