Daikin DPS Installation And Maintenance Manual

Also see for DPS: Installation and maintenance manual Installation and maintenance manual Installation manual Installation and maintenance manual

Contents

Daikin DPS Installation And Maintenance Manual Manual pdf 92 page image

Determining Cooling StatusClg Status is a status item which indicates whether or notmechanical cooling is currently allowed If cooling is disabled,the reason is indicatedThe following are descriptions of cooling status statesEnabledMechanical cooling is enabled if all the following are true:• Control mode is not set via the keypad to fan only or heatonly• Control mode is set via the keypad to auto and notdisabled via a network command• The outdoor air temperature (OAT) is high enough foroperation• Compressor operation is not disabled by an alarmconditionNoneCooling capability is not providedOff AmbientThe outdoor air temperature (OAT) is too low for operationThe OAT becomes too low for operation when it drops belowthe OAT cooling lockout setting OAT becomes high enough foroperation when it rises above the OAT cooling lockout settingby more than 2°F (adjustable - OAT Diff)Off AlarmCompressor operation is disabled by an alarm conditionOff NetworkControl mode is set via the keypad to auto and cooling isdisabled via a network commandOff ManualControl mode is set to Fan Only or Heat Only via the keypaddisplayDetermining Heat StatusHtg Status is a status item which indicates whether or not theprimary source of heating in the unit is currently allowed Onheat pump units this is the compressor heating On non-heatpump units this is the gas, electric or hot water heatThe following are descriptions of the heating status states:EnabledIf the unit is a heat pump, compressor heating is enabled if all ofthe following are true:• Control Mode is not set via the keypad to fan only or coolonly• Control Mode is set via the keypad to auto and heating isnot disabled via a network command• The outdoor air temperature (OAT) is warm enough(above 0°F default) and cool enough (below 55°F default)for compressor heating operationIf the unit is not a heat pump, heating is enabled if all of thefollowing are true:• Heating capability is provided• Control Mode is not set via the keypad to fan only or coolonly• Control Mode is set via the keypad to auto and heating isnot disabled via a network command• The outdoor air temperature (OAT) is cool enough (below55°F default) for heating operationNoneUnit is not a heat pump and heating capability is not providedOff AmbientIf unit is a heat pump, the OAT is too high or too low forcompressor heating operation OAT becomes too high forcompressor heat operation when it rises above the high OATheating lock out set point The OAT becomes low enough forcompressor heat operation when it drops below the high OATheating lock out set point by more than the heating lockoutdifferential The The OAT becomes too low for compressorheat operation when it falls below the low OAT heating lock outset point The OAT becomes high enough for compressor heatoperation when it rises above the low OAT heating lock out setpoint by more than the heating lockout differentialIf unit is not a heat pump, the OAT is too high for heatingoperation The OAT becomes too high for heat operation whenit rises above the high OAT heating lock out set point TheOAT becomes low enough for heat operation when it dropsbelow the high OAT heating lock out set point by more than theheating lockout differentialOff NetworkControl Mode is set via the keypad to auto and heating isdisabled via a network commandOff ManualControl Mode is set via the keypad to fan only or cool onlyOM 1141-3 • MICROTECH UNIT CONTROLLER 92 wwwoperator ’s guIde