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Download Carrier 50PD06 Unit installation
Transcript
measured atemperature above 268F(131C)orthethermistor has the system controller providing the signal may not be powered. short circuited (jumpered out). The DSC will de-energize the compressor contactor and unloader TheDSCwillde-energize thecompressor contactor andunloader solenoid and the alarm relay contacts will close causing a T051 solenoid, andthealarm relaycontacts will close causing aT051 alert on the ComfortLink Control. Once the system controller demand signal input has risen above 0.5VDC, the ALERT code alertontheComfortLink Control. Thecompressor will be allowed torestart after30minute delayandaftertheDTTreads and alarm relay output will reset. If the demand signal is above 1.44VDC and the anti-short cycle timer has timed out, the below 250F(120C).Theflashcode andalarm relay contacts will compressor will restart. bereset afterthecompressor hasrunfor60minutes without any otherALERTs.If five discharge temperature ALERTs have Flash Code 6 -- Discharge Thermistor Fault occurred withinfourhours, theDSCwilllockoutthecompressor. This occurs when the DSC is not receiving a signal from the Thelockout canonlybereset bycycling the24VAC power offand discharge temperature thermistor (DTT). The thermistor may be on. missing, Flash Code 3 -- Compressor Protector Trip This occurs when the demand signal from the system will close and the DSC will not increase the capacity of the compressor beyond 50% loading. This ALERT code and alarm relay output are reset by reconnecting the DTT. controller greater than 1.44VDC and there is no compressor current This could be due to the compressor's internal overload is detected. protector being open, fuse or breaker open, power disconnected to compressor contactor, compressor power wiring not run through DSC current transformer port or a compressor contactor failure. The DSC will de-energize the compressor contactor and unloader solenoid and the alarm relay contacts will close causing a T051 alert on the ComfortLink Control. The DSC will wait for the two minute anti-short controller demand compressor the restart, cycle timer to time out and if the system signal is still greater than 1.44VDC, energize the contactor again. If compressor current the ALERT code and alarm relay output is detected on will reset. The DSC will attempt to restart compressor as long as the controller demand is above 1.44VDC. There is no lockout for this ALERT. Flash Code 4 -- Locked system feature Rotor Flash disconnected Code 7 --Reserved alarm relay ComfortLink contacts will close causing Control. The unloader the 24VAC 5 -- power Demand off and on. Signal the a T051 solenoid alert will on the remain solenoid will de-energize causing the compressor to run loaded. The ALERT code and alarm relay output are reset when current is Flash detected Code 9 -- while system Low 24VAC controller demand signal is below Supply the supply The DSC voltage to the DSC has dropped will de-energize the compressor contactor and unloader solenoid. The alarm relay contacts may close if the voltage is high enough for the alarm relay to pull in. Loss This occurs when the demand signal input has dropped below 0.5VDC. The demand input signal wire may be disconnected or Table LED Flash Code when energized causing the compressor to run unloaded as long as the system controller demand signal is less than 1.44VDC. If the system controller demand is greater than 1.44VDC, the unloader This occurs when below 18.5VDC. Flash Code for future use in this condition since the DSC cannot open the compressor contactor. The DSC will energize the compressor contactor and the contacts Control. cycling relay contacts system controller demand signal is below 1.44VDC. The compressor contactor may have welded contacts or the contacts may be mechanically jammed. The compressor will continue to run no longer 1.44VDC. causing a T051 alert on the ComfortLink results in a lockout and can only be reset by The alarm Flash Code 8 -- Compressor Contactor Fault This occurs when the compressor current is detected A locked rotor condition in the compressor is sensed by the DSC on four consecutive start ups. The DSC will de-energize the compressor contactor and unloader solenoid and the alarm relay will close This code or a wire broken. Description The ALERT code and alarm relay output are reset when the supply voltage to the DSC rises above 19.5VAC. 10 -- DSC Red LED Flash Codes Action Taken by Control Reset Method Probable Cause N/A N/A N/A 1 Flash Reserved for Future Use 2 Flash High Discharge Temperature Compressor shutdown Automatic Compressor discharge temperature degrees F or the DTT is shorted. 3 Flash Compressor Compressor shutdown Automatic Compressor's internal overload protector being open, fuse or breaker open, power disconnected to compressor contactor, compressor power wiring not run through DSC current transformer port or a compressor contactor failure. 4 Flash Locked Rotor Compressor lockout Manual 5 Flash Demand Signal Loss Compressor shutdown Automatic Signal wire may be disconnected or the system controller providing the signal may not be powered 6 Flash Discharge Thermistor Capacity Limited Automatic DTT may be missing, disconnected 7 Flash Reserved for Future Use 8 Flash Compressor 9 Flash Low 24VAC Supply Protector Trip Fault Contactor Fault N/A N/A Four consecutive is greater then 268 start ups with locked rotor. or a wire broken N/A Keep capacity at 15% Automatic Compressor contactor may have welded contacts or the contacts may be mechanically jammed Compressor shutdown Automatic Bad connection 32 or transformer.
