User’s Manual
Questions or Comments?Call 1-888-923-2323
Page 1: ...User s Manual Questions or Comments Call 1 888 923 2323 ...
Page 2: ...al overload protection The software in the Comfort Alert module has been optimized for different types of air conditioning applications cooling only heat pump two stage compressors and commercial three phase This user manual is for single phase applications For three phase applications refer to the Comfort Alert Commercial user manual 2005ECT 191 NOTE This module does not provide safety protection...
Page 3: ...18 30VAC 48 62 Hz Power Requirement 0 5 VA nominal 0 5 VA nominal 1 5 VA nominal 1 5VA nominal without solenoid on 7 0VA nominal with solenoid on UL Restrictions Use only with Class 2 circuits Use only with Class 2 circuits Use only with Class 2 circuits Use only with Class 2 circuits WARNING Hazardous voltage inside air conditioning system Discon nect power before installing or servicing module M...
Page 4: ...0 543 0012 00 943 0012 00 A 1 81 in 46 mm D 3 15 in 80mm B 2 44 in 62 mm E 2 44 in 62 mm C 1 43 in 36 mm Figure 2 Part Numbers 543 0010 01 943 0010 01 A 1 81 in 46 mm D 3 15 in 80mm B 2 44 in 62 mm E 2 44 in 62 mm C 1 43 in 36 mm Figure 3 ...
Page 5: ...ndoor unit or thermostat The module cannot be powered by the C terminal on a defrost board or other control board without experiencing nuisance alerts Refer to Figures 6 thru 10 When constant 24VAC R wire is not present in the outdoor unit use one of the spare wires in the thermostat cable to bring power to the module Connect the other end of the spare wire to R at the indoor unit or thermostat Re...
Page 6: ... modules may have different thermostat demand signal wiring Follow manufacturer s wiring instructions when replacing module NOTE After the thermostat demand signal is connected verify R and C are phased properly by measuring 24VAC across Y and C when demand is present except 543 0010 01 943 0010 01 Figure 6 Air Conditioning Schematic 543 0010 00 943 0010 00 Solid Line shows field Dashed line shows...
Page 7: ...odule 543 0012 00 Terminal Block Y R C C R Y1 C R Y1 ECB ECB Electronic Control Board Defrost Board WARNING Hazardous voltage inside air conditioning system Discon nect power before installing or servicing module Module must be installed and serviced only by qualified personnel Solid Line shows field Dashed line shows thermostat Comfort Alert LPCO HTCO HPCO Indoor Unit HTCO High Temperature Cut Ou...
Page 8: ...L Y1 L Y1 ECB ECB Electronic Control Board Defrost Board C C R R L Solid Line shows field Dashed line shows thermostat Comfort Alert LPCO HTCO HPCO Indoor Unit HTCO High Temperature Cut Out Switch HPCO High Pressure Cutout Switch LPCO Low Pressure Cut Out Switch Schematic Abbreviation Description CC Compressor Contactor 2nd Stage Indoor Thermostat installed wiring demand wiring in system without H...
Page 9: ...the second stage cooling solenoid inside the compressor after Y2 has been energized for 5 seconds Whenever the compressor is not running Comfort Alert will not power the solenoid regardless of the state of Y2 If Alert codes 1 or 9 appear while the compressor is running Comfort Alert will turn off the solenoid to prevent solenoid damage from overheating conditions allowing the compressor to continu...
Page 10: ...ompressor Force a thermostat call for cooling and when the compressor starts to run the yellow Alert LED will begin flashing a Code 8 in dicating a Welded Contactor Disconnect power from the compressor and 24VAC from Comfort Alert While Comfort Alert is off reattach the wire to the Y terminal Reapply power to compressor and 24VAC to Comfort Alert the yellow Alert LED will flash the pre vious code ...
Page 11: ...low coil blockages or return air filter Check ductwork or registers for blockage 4 Faulty metering device Check TXV bulb installation size location and contact Check if TXV fixed orifice is stuck closed or defective 5 Condenser coil is dirty 6 Liquid line restriction filter drier blocked if present in system 7 Thermostat is malfunctioning Check thermostat sub base or wiring for short circuit Check...
Page 12: ...ly long compressor protector reset time due to ex treme ambient temperature 7 Compressor windings are damaged Check compressor motor winding resistance Yellow ALERT Flash Code 6 Open Start Circuit Current only in run circuit 1 Run capacitor has failed 2 Open circuit in compressor start wiring or connections Check wiring and connectors between supply and the compressor S terminal 3 Compressor start...
Page 13: ... Determine if both R and C module terminals are connected Verify voltage is present at module s R and C terminals Re view 24VAC Power Wiring page 6 7 for R and C wiring Determine if R and Y terminals are wired in reverse Verify module s R and C terminals have a constant source Re view 24VAC Power Wiring page 6 7 for R and C wiring Verify Y terminal is connected to 24VAC at contactor coil Verify vo...
Page 14: ...anty This warranty does not cover normal wear of parts or damage resulting from any of the following negligent use or misuse of the product use on improper voltage or current use contrary to the operating instructions disassembly repair or alteration by anyone other than Emerson Climate Technologies Inc Further the warranty does not cover acts of God such as fire flood hurricanes and tornadoes EME...
