Carrier 48/50PD05 User Manual
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30Table 8 — ComfortLink™ Alarm Codes (cont)ALARMORALERTNUMBERDESCRIPTION ACTION TAKEN BYCONTROLRESETMETHOD PROBABLE CAUSET178 Loss of Communication with the CapacityControl BoardUnit shutdown ---HVACdisable Automatic Communication wiring problem with AUX1 or faultyMBB, ECB, or AUX1T179 Loss of communication with the EconomizerControl BoardNo economizeroperation Automatic Communication wiring problem with ECB or faultyMBB, ECB, or AUX1T180 Loss of communication with the EconomizerActuatorNo economizeroperation Automatic Communication wiring problem with actuator.A200 Linkage Timeout Error --- Comm Failure No Linkage Operationfall back to local SPT Automatic Received a table write from Linkage before, now notreceiving any linked commandsA404 Fire Shutdown Unit Shutdown Automatic Smoke detected by smoke detectorT408 Dirty Filter Alert Generated Automatic Dirty FilterT409Fan Status Switch ON, Fan Contactor OFF If IDF.F = Yes, then UnitShutdownIf IDF.F =YES, thenManual,otherwiseautomaticBad Fan Status Switch. Configuration incorrect.Fan Status Switch OFF, Fan Contactor ON If IDF.F = Yes, then UnitShutdownIf IDF.F =YES, thenManual,otherwiseautomaticTripped Circuit Breaker. Broken belt. Bad indoor fanmotor. Configuration incorrect. Bad fan status switch.T414Economizer Damper Actuator Out ofCalibration Alert Generated Automatic Calibrate economizer (E.CAL). If problem still existthen determine what is limiting economizer rotation.Economizer Damper Actuator Torque AboveLoad Limit Alert Generated Automatic Actuator load too high. Check damper load.Economizer Damper Actuator HuntingExcessively Alert Generated Automatic Damper position changing too quickly.Economizer Damper Stuck or Jammed Alert Generated Automatic No economizer motion. Check damper blades, gears,and actuator.Economizer Damper Actuator MechanicalFailure Alert Generated Automatic Check actuator and replace if necessary.Economizer Damper Actuator DirectionSwitch Wrong Alert Generated Automatic Actuator direction control switch (CCW, CW) wrong.T415 IAQ Input Out of Range No IAQ Operations Automatic Bad sensor, bad wiring, or sensor configuredincorrectly.T416 OAQ Input Out of Range No OAQ Operations Automatic Bad sensor, bad wiring, or sensor configuredincorrectly.LEGENDECB -- Economizer Control BoardIGC -- Integrated Gas ControllerMBB -- Main Base BoardOAT -- Outdoor--Air ThermistorCooling TroubleshootingUse the Scrolling Marquee display or a CCN device to view thecooling status display and the cooling diagnostic display (seeAppendix A) for information on the cooling operation. Check thecurrent alarms and alarm history for any cooling alarm codes andcorrect any causes. (See Table 9.)Verify any unique control configurations per installed siterequirements or accessories. If alarms conditions are corrected andcleared, operation of the compressors and fans may be verified byusing the Service Test mode. (See Table 5.) See Table 9 for generalcooling service analysis.48/50PD |
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