Carrier 48/50HC04-28 Controls, Start-up, Operation And Troubleshooting

Also see for 50HCQ04---12: Controls, Start-Up, Operation and Troubleshooting Instructions Service and maintenance instructions

Carrier 48/50HC04-28 Controls, Start-up, Operation And Troubleshooting Manual pdf 31 page image

31runtime accumulator by setting the maintenance pointReset Filter Runtime Alarm to On, back to Off, andclicking the OK button after each setting. Setting unitconfiguration Filter Service Alarm Timer value to 0disables the filter service alarm function.Airside Linkage AlarmThis alarm indicates that RTU Open was connected to azoned system using Airside Linkage and it lostcommunications with its linkage master or it is receivingdata from multiple masters.PerformanceCurrent Performance DataThe RTU Open collects performance data duringoperation. The data can be used to monitor the operationof the unit over time.Equipment RuntimeThe RTU monitors the supply fan and records the amountof time the unit has been operating. This value willcontinue to accumulate runtime until Performance Datahas been changed to Reset or will also automatically resetevery 24 hours at midnight if Save Performance DataDaily is set to Enable.Economizer UtilizationThe amount of time the equipment has operated in theeconomizer mode as a percentage of the equipmentruntime above. This value will continue to accumulateruntime until Performance Data has been changed toReset or will automatically reset every 24 hours atmidnight if Save Performance Data Daily is set to Enable.DCV UtilizationThe amount of time the equipment has provided DemandControlled Ventilation as a percentage of the equipmentruntime above. This value will continue to accumulateruntime until Performance Data has been changed toReset or will automatically reset every 24 hours atmidnight if Save Performance Data Daily is set to Enable.Unocc Free Cool UtilizationThe amount of time the equipment has provided FreeCooling while unoccupied as a percentage of theequipment runtime above. This value will continue toaccumulate runtime until Performance Data has beenchanged to Reset or will automatically reset every 24hours at midnight if Save Performance Data Daily is set toEnable.Part Load Cooling UtilizationThe amount of time the equipment has operated in thecooling mode but at less than 100% full cooling capacityas a percentage of the equipment runtime above. Thisvalue will continue to accumulate runtime untilPerformance Data has been changed to Reset or willautomatically reset every 24 hours at midnight if SavePerformance Data Daily is set to Enable.Full Load Cooling UtilizationThe amount of time the equipment has operated in thecooling mode at 100% full cooling capacity as apercentage of the equipment runtime above. This valuewill continue to accumulate runtime until PerformanceData has been changed to Reset or will automatically resetevery 24 hours at midnight if Save Performance DataDaily is set to Enable.Heating UtilizationThe amount of time the equipment has operated in theheating mode as a percentage of the equipment runtimeabove. This value will continue to accumulate runtimeuntil Performance Data has been changed to Reset or willautomatically reset every 24 hours at midnight if SavePerformance Data Daily is set to Enable.Recorded High OATThe highest value of OAT noted since the last resetoccurred. This value will continue to update untilPerformance Data has been changed to Reset or willautomatically reset every 24 hours at midnight if SavePerformance Data Daily is set to Enable.Recorded Low OATThe lowest value of OAT noted since the last resetoccurred. This value will continue to update untilPerformance Data has been changed to Reset or willautomatically reset every 24 hours at midnight if SavePerformance Data Daily is set to EnablePerformance DataIndicates the mode that is currently in effect. This point isused to reset all of the above performance data manuallyat any time.Range = Collect/Reset Default = CollectHistorical Performance DataThe RTU Open collects historical performance every timethe performance data above has been reset.Save Performance Data DailyIf set to Enable, the control will automatically transfer theCurrent Performance Data directly to the HistoricalPerformance Data values for each entry once every 24 hoursat midnight. All Historical data will only be available forviewing for the next 24 hours. Also, all current performancedata will be reset after the data has been transferred.Range = Disable/Enable Default = EnableEquipment RuntimeThe value of the equipment runtime when the currentperformance data was last reset.Economizer UtilizationThe value of the Economizer Utilization when the currentperformance data was last reset.DCV UtilizationThe value of the DCV Utilization when the currentperformance data was last reset.Unocc Free Cool UtilizationThe value of the Unocc Free Cool Utilization when thecurrent performance data was last reset.Part Load Cooling UtilizationThe value of the Part Load Cooling Utilization when thecurrent performance data was last reset.Full Load Cooling UtilizationThe value of the Full Load Cooling Utilization when thecurrent performance data was last reset.48 ---50LHTCQ ---01T