Service Manual40GXC / 38GXC Cooling Only40GXQ / 38GXQ Heat PumpInverter---Driven High Wall Duct---Free Split SystemSizes 009 to 012INTRODUCTIONThis Service Manual provides the necessary information to service,repair, and maintain the 38/40GXC(Q).TABLE OF CONTENTSPAGESAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . . . . . . .MODEL / SERIAL NUMBER NOMENCLATURE 2. . . . . . . . .STANDARD FEATURES AND ACCESSORIES 3. . . . . . . . . . .SPECIFICATIONS 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIMENSIONS 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CLEARANCES 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SYSTEM OPERATING ENVELOPE 7. . . . . . . . . . . . . . . . . . . .ELECTRICAL DATA 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .WIRING 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CONNECTION DIAGRAMS 7. . . . . . . . . . . . . . . . . . . . . . . . . .WIRING DIAGRAMS 8--9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .REFRIGERATION CYCLE DIAGRAM 10. . . . . . . . . . . . . . . . .REFRIGERANT LINES 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .SYSTEM EVACUATION AND CHARGING 11. . . . . . . . . . . . .CONTROL SYSTEM 12--13. . . . . . . . . . . . . . . . . . . . . . . . . . . .SEQUENCE OF OPERATION 13. . . . . . . . . . . . . . . . . . . . . . . .MODES OF OPERATION 13--15. . . . . . . . . . . . . . . . . . . . . . . . .TROUBLESHOOTING 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DIAGNOSTIC CHARTS 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX 24--27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .SAFETY CONSIDERATIONSImproper installation, adjustment, alteration, service, maintenance,or use can cause explosion, fire, electrical shock, or otherconditions which may cause death, personal injury, or propertydamage. Consult a qualified installer, service agency, or yourdistributor or branch for information or assistance. The qualifiedinstaller or agency must use factory--authorized kits or accessorieswhen modifying this product. Refer to the individual instructionspackaged with the kits or accessories when installing.Follow all safety codes. Wear safety glasses, protective clothing,and work gloves. Use quenching cloth for brazing operations.Have fire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions included inliterature and attached to the unit. Consult local building codes andNational Electrical Code (NEC) for special requirements.Recognize safety information. This is the safety--alert symbol !!When you see this symbol on the unit and in instructions ormanuals, be alert to the potential for personal injury.Understand these signal words: DANGER, WARNING, andCAUTION. These words are used with the safety--alert symbol.DANGER identifies the most serious hazards which will result insevere personal injury or death. WARNING signifies hazardswhich could result in personal injury or death. CAUTION is usedto identify unsafe practices which may result in minor personalinjury or product and property damage. NOTE is used to highlightsuggestions which will result in enhanced installation, reliability, oroperation.! WARNINGELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personal injuryor death.Before installing, modifying, or servicing system, mainelectrical disconnect switch must be in the OFF position.There may be more than 1 disconnect switch. Lock out andtag switch with a suitable warning label.