Carrier PG9UAA Troubleshooting Manual

Contents

Carrier PG9UAA Troubleshooting Manual Manual pdf 1 page image

1PG9UAATroubleshooting GuideVARIABLE SPEED, TWO---STAGEELECTRONIC CONDENSINGGAS FURNACEINDEXPAGESAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .INSTRUCTIONS 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .EXAMPLE 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .GENERAL 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SEQUENCE OF OPERATION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single--Stage Thermostat and Two--Stage Heating (Adaptive Mode) 2. . . . . . . . . . . . . . .Two--Stage Thermostat and Two--Stage Heating 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cooling Mode 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single--Speed Cooling 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Single--Stage Thermostat and Two--Speed Cooling (Adaptive Mode) 4. . . . . . . . . . . . . .Two--Stage Thermostat and Two--Speed Cooling 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Dehumidify Mode 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Super--Dehumidify Mode 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous--Blower Mode 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Heat Pump Defrost 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Component Test 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SERVICE/STATUS CODE INSTRUCTIONS 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .START HERE 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RAPID FLASHING AMBER LED 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IMPROPER COOLING AIR FLOW 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HIGH HEAT TEMPERATURE RISE TOO LOW 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 11 -- NO PREVIOUS CODE 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 12 -- BLOWER ON AFTER POWER UP 12. . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 13 -- LIMIT CIRCUIT LOCKOUT 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 14 -- IGNITION LOCKOUT 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 15 – BLOWER MOTOR LOCKOUT 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 21 -- GAS HEATING LOCKOUT 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 22 -- ABNORMAL FLAME--PROVING SIGNAL 15. . . . . . . . . . . . . . . . . . . . .STATUS CODE 23 -- PRESSURE SWITCH DID NOT OPEN 15. . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 24 -- SECONDARY VOLTAGE FUSE IS OPEN 16. . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 25 – MODEL SELECTION OR SETUP ERROR 18. . . . . . . . . . . . . . . . . . . . . .STATUS CODE 31 – HIGH--HEAT SWITCH OR RELAY DID NOT CLOSE OR REOPEN 18. .STATUS CODE 32 -- LOW--HEAT PRESSURE SWITCH DID NOT CLOSE ORREOPENED 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 33 -- LIMIT CIRCUIT FAULT 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 34 -- IGNITION--PROVING FAULT 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 41 – BLOWER MOTOR FAULT 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 42 – INDUCER MOTOR FAULT 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 43 -- LOW--HEAT PRESSURE SWITCH OPEN WHILE HIGH--HEATPRESSURE SWITCH IS CLOSED 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .STATUS CODE 45 – CONTROL CIRCUITRY LOCKOUT 30. . . . . . . . . . . . . . . . . . . . . . . . . . .CLEANUP AND START--UP INSTRUCTIONS 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX A -- BOARD LAYOUT & WIRING SCHEMATIC 31. . . . . . . . . . . . . . . . . . . . . . . .APPENDIX B -- ECM BLOWER MOTOR DESCRIPTION & OPERATION 33. . . . . . . . . . . . . .APPENDIX C -- PRESSURE CHECK DIAGRAM 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX D -- STATIC PRESSURE READING LOCATION DIAGRAMS 35. . . . . . . . . . . . . .APPENDIX E -- QUICK REFERENCE INFORMATION 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX F -- FURNACE STAGING ALGORITHM 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SAFETY CONSIDERATIONSInstalling and servicing heating equipment can be hazardous due togas and electrical components. Only trained and qualifiedpersonnel should install, repair, or service heating equipment.Untrained personnel can perform basic maintenance functions suchas cleaning coils, or cleaning and replacing filters. All otheroperations should be performed by trained service personnel.When working on heating equipment, observe precautions inliterature, on tags, and on labels attached to or shipped with theunit, and other safety precautions that may apply.Follow all safety codes. In the United States, follow all safetycodes including the National Fuel Gas Code (NFGC) NFPA54--2009/ANSI Z223.1--2009. In Canada, refer to the NationalStandard of Canada Natural Gas and Propane Installation Codes(NSCNGPIC), CSA B149.1--10.Wear safety glasses and work gloves. Have a fire extinguisheravailable during start--up, adjustment procedures, and service calls.Recognize safety information. This is the safety--alert symbol .When you see this symbol on the furnace and in instructions ormanuals, be alert to the potential for personal injury.Understand the signal words DANGER, WARNING, andCAUTION, and NOTE. The words DANGER, WARNING, andCAUTION are used with the safety--alert symbol. DANGERidentifies the most serious hazards which will result in severepersonal injury or death. WARNING signifies hazards whichcould result in personal injury or death. CAUTION is used toidentify unsafe practices which may result in minor personal injury,or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability, oroperation.INSTRUCTIONSThis guide uses your expertise and observations to lead you to thetrouble spot as efficiently as possible. This is only intended as aguide and should not be used blindly. Your experience andexpertise are of high value when troubleshooting this unit. Do notdisregard all of your instincts.The variable speed furnace control was designed with diagnosticcapabilities built in. An AMBER LED is used to flash a statuscode which will lead you to one of the sections as listed in theIndex.You should ALWAYS begin in the START HERE section (seeIndex for page number) which will guide you to the appropriatesection where a minimal number of steps will be used to correct theproblem. Once in a section, read the ACTION. An ACTION mayhave a number in the GO TO column. Do whatever the ACTIONsays, then proceed to the step indicated in the GO TO column.If the ACTION is a question (a question will have a number in theYES or NO column), answer it YES or NO. If the answer is YES,go to the step indicated in the YES column. If the answer is NO,go to the step indicated in the NO column.