Carrier 33CS Installation, Service, And Troubleshooting Instructions

Also see for 33CS: Owner's manual Owner's manual Operating guide Installation, start-up, and operating instructions Installation, start-up, and operating instructions

Carrier 33CS Installation, Service, And Troubleshooting Instructions Manual pdf 28 page image

28When alarm condition is initiated:• the TEMP system thermostat will continue to operatethe system. This allows future calls for heat or cool to beinitiated.• alarm SE12, Cannot Detect Fan OFF, is issued• a manual reset is required to reset the alarmCONFIGURATION TO ACTIVATE ALARM — To activatethe alarm, configure the Fan Status Switch option (category 5,option 10) to ON. Leave the Fan Operation For Heat option(category 4, option 1) ON.CONFIGURATION TO NORMALIZE ALARM — To nor-malize the alarm, no is configuration required. Follow the pro-cedure to clear the alarm below.CONFIGURATION EXAMPLE — The Fan Status Switchoption (category 5, option 10) is set to ON.At the start of a cooling mode, the fan relay is switched onby the TEMP system thermostat. Fan operation is initiated andthe fan has 30 seconds to generate sufficient airflow to closethe normally-open fan-status flow switch. If the sensor contactsare closed within 30 seconds, the system operates normally andno Fan Status alarm is generated. If, however, the sensor con-tacts are not closed within 30 seconds, an alarm is generated.The thermostat display will not indicate ‘‘fan’’ until fan opera-tion is verified by the fan-status flow switch.The alarm will cause the system to shut down. No cooling,heating, or ventilation is available until a reset of the system isinitiated.In a heat mode, the same sequence is followed, except thatthe delay time is increased to 120 seconds. If the Fan Operationfor Heat option (category 4, option 1) is configured OFF, noalarm is generated in the heat mode.CLEARING THE ALARM FROM THE THERMOSTAT —Fan status alarms are cleared or erased from the system in 3ways using a manual reset:• Cycle power to the thermostat off, then on.• Initiate a reset by switching the Unit Reset option to the ONconfiguration (category 7, option 11).• Switch the configuration value for the Fan Status Switchoption to OFF then ON (category 5, option 10).Filter Status Alert — Refer to Table 9 for Filter Statusalert specifications.Table 9 — Filter Status AlertOPERATION — This alert is used to indicate the status of thefilters in the HVAC unit. The Dirty Filter alert indicates a highpressure drop across the filters, caused by collection of exces-sive particles and debris on the filter media.Pressure drop across the filters in the unit increases until itreaches the Filter Status sensor’s set point. This causes the con-tacts of the sensor to close. The contact closure of the sensor isdetected by a discrete input. If the contacts remain closed for10 minutes, a Dirty Filter alert is initiated.A manual reset is required to clear this alert.CONFIGURATION TO ACTIVATE ALERT — To activatethe alert, configure the Humidity Sensor/Fan Filter Switchoption (category 5, option 11) to position 2. The TEMP systemthermostat will use the sensor as a Filter Status Switch.CONFIGURATION TO NORMALIZE ALERT — An SE09alarm (alert) will not stop operation of the system. A manualreset is required to clear this alert.CONFIGURATION EXAMPLE — The Filter Status sensorwill close contacts (alert) when differential pressure increasesfrom zero (clean filter, no restriction, or pressure drop acrossfilter) to the sensor set point (dirty filter with restriction acrossfilter). The Humidity Sensor/Fan Filter Switch option (cate-gory 5, option 11) is set to the value of 2 to specify the filterstatus switch.During operation of the unit over a period of time, an SE09error is declared. This indicates that the differential pressureacross the filters has increased beyond the set point value of thesensor. The Alternate Information ‘‘Dirty Filter Status’’ (cate-gory 7, option 3, information item 9) will read ON, also indi-cating a dirty filter.After the dirty filters are changed, the Dirty Filter Statusmust be manually reset. The system then returns to normal op-eration and will not alert until the differential pressure set pointof the Filter Status sensor is again reached.CLEARING THE ALERT FROM THE THERMOSTAT —Dirty Filter Alerts are cleared or erased from the system in 3ways using a manual reset:• Cycle power to the thermostat off, then on.• Initiate a reset by switching the Unit Reset option to the ONconfiguration (category 7, option 11).• Switch the configuration value for Fan Status Switch optionto OFF then ON (category 5, option 10)Indoor-Air Quality Status Alarm — Refer toTable 10 for IAQ alarm specifications.Table 10 — IAQ (Indoor-Air Quality) Status AlarmLEGENDOPERATION — When the CO2 level exceeds the preset level,the sensor signals the TEMP system thermostat. The TEMPsystem thermostat will wait until the IAQ Alarm Delay option(category 14, option 7) has expired, then it will issue an SE10.The system (if configured) will bring in fresh outdoor air tomeet IAQ requirements.FUNCTION DESCRIPTIONControllers TEMP System ThermostatSensor Required Filter, 33CSFS--01, Digital InputSensor Wiring Terminals 10 and 11 of 33CSUCE-06Relay PackInput Closed contacts from high pressuredropOutput Alarm (SE09), Dirty FilterCategory/Option 5.11 (Humidity Sensor/Filter StatusSwitch)ConfigurationValues Default 0, Min 0, Max 2 to activateConfigurationIncrements NoneAssociatedFunctions NoneFUNCTION DESCRIPTIONControllers TEMP System Thermostat, ZoneController, Bypass ControllerSensor Required IAQ (CO 2 ) SensorSensor Wiring Pins 6 and 7 of Relay BoardInput Closed contact when level exceeded.Output SE10Category/Option 14.1 (IAQ Sensor)ConfigurationValues 14.1 — ONConfigurationIncrements Not ApplicableAssociatedFunctions NoneIAQ — Indoor-Air Quality