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Hersteller: Bryant Dateigröße: 4.25 mb Dateiname: Unterrichtssprache:

Try the following solutions: S Turn the RTU---MP off, then on. S Format the RTU--MP. S Download memory to the RTU---MP. S Replace the RTU---MP. 580J 45 Table 18 – Troubleshooting Alarms POINTNAMESafetyChainAlarmFireShutdownAlarmSpaceTempSensorFailureSATSensorAlarmHighSpaceTempAlarmLowSpaceTempAlarmHighSupplyAirTempLowSupplyAirTempSupplyFanFailedtoStartSupplyFaninHandCompressorSafetyAlarmSetpointSliderAlarmDirtyFilterAlarmSwitchConfigurationAlarmMisconfiguredAnalogInputOATSensorAlarmSpaceRHSensorAlarmOutdoorRHSensorAlarmHighSpaceHumidityLowSpaceHumidityIAQSensorAlarmOAQSensorAlarmHighCarbonDioxideLevelSupplyFanRuntimeAlarmCompressor1RuntimeAlarmCompressor2RuntimeAlarm BACnet OBJECT NAME safety_chain fire_alarm spt_alarm sat_alarm spt_hi spt_lo sat_hi sat_lo sf_fail sf_hand dx_compstat slide_alarm filter sw_cfg_alarm an_cfg_alarm oat_alarm sprh_alarm oarh_alarm sprh_hi sprh_lo iaq_alarm oaq_alarm co2_hi sf_rntm dx1_rntm dx2_rntm ACTIONTAKENBYCONTROLAlarmGeneratedImmediateShutdownAlarmGeneratedImmediateShutdownAlarmGeneratedImmediateShutdownAlarmGenerated ImmediateShutdownAlarmGeneratedAlarmGeneratedAlarmGeneratedAlarmGeneratedAlarmGeneratedImmediatelydisableOperationAlarmGeneratedRampdownOperationsAlarmGeneratedAlarmGeneratedOffsetsettozeroAlarmGeneratedAlarmGeneratedDisablemisconfiguredswitchfunctionsAlarmGeneratedDisable4selectableanaloginputsAlarmGeneratedEconomizerandLowambientDXcoolinglockoutdisabled. AlarmGeneratedDehumidificationdisabledAlarmGeneratedAlarmGeneratedAlarmGeneratedAlarmGeneratedDisablesIAQOperationEconomizermovestominimumpositionAlarmGeneratedSetOAQto400AlarmGeneratedAlarmGeneratedAlarmGeneratedAlarmGenerated RESET METHOD Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic/re set timer when configured with or without switch Configure correctly Configure correctly Automatic Automatic Automatic Automatic Automatic Automatic Automatic Automatic clear the timer clear the timer clear the timer PROBABLE CAUSE Over load Indoor Fan or Electric Heater overheat. Smoke detected by smoke detector or configuration incorrect Faulty, shorted, or open thermistor caused by wiring error or loose connection. Faulty, shorted, or open thermistor caused by wiring error or loose connection. Thespace temperaturehas risen above thecool setpoint by more than the desired amount. The space temperature has dropped below the heat setpoint by more than the desired amount. SAT is greater then 160 degrees for more than 5 minutes. Thesupply air temperatureis below 35_Ffor more than 5 minutes. Tripped Circuit Breaker, Broken belt, Bad indoor fan motor, Configuration incorrect, Bad fan status switch. Bad Fan Status Switch, Configuration incorrect. Compressor would not start. STO sensoris open orshorted formorethen 5 seconds. Dirty Filter, supply fan run time exceeded, filter switch configuration wrong. More than one binary input is configured for the same purpose. More then one discrete input is configured to provide the same function. More then one analog input is configured to provide the same function. Faulty, shorted, or open thermistor caused by wiring error or loose connection. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. IRH is greater then 70% for more then 10 minutes. IRH is less then 35% for more then 10 minutes. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. Sensor reading is out of range. Bad sensor, bad wiring, or sensor configured incorrectly. CO2 reading is above 1200ppm. Supply fan run time exceeded user defined limit. Compressor run time limit is exceeded. Compressor run time limit is exceeded. 580J 46 Alarms Alarms can be checked through the network and/or the local access. All the alarms are listed in Table 18 with name, object name, action taken by control, reset method, and probable cause. There are help screens for each alarm on the local access display and listed in RTU- --MP Controls, Start- --Up, Operation, and Troubleshooting Instructions (Form 48- --50H- --T- --2T), Appendix A: Help Screens. Some alarms are explained in detail below. Safety Chain Alarm This alarm occurs immediately if the supply- --fan internal overload trips or if an electric- --heat limit switch trips. The Unit Status will be Shutdown and the System Mode will be Disable. When this happens LCTB (R terminal) will not have 24 VAC, but the RTU- --MP board will still be powered. All unit operations stop immediately and will not restart until the alarm automatically clears. There are no configurations for this alarm; it is all based on internal wiring. This alarm will never occur if Fire Shutdown Alarm is active. Fire Shutdown Alarm This alarm occurs immediately when the smoke detector senses smoke. The Unit Status will be Shutdown and the System Mode will be Disable. All unit operat...

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