Carrier 58PHA/PHX Installation, start-up, operating and Installation And Operating Instructions Manual

Also see for start-up and: Controls, start-up, operation, service and troubleshooting instructions Controls, start-up, operation, service and troubleshooting instructions

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Carrier 58PHA/PHX Installation, start-up, operating and Installation And Operating Instructions Manual Manual pdf 43 page image

43SERVICE AND MAINTENANCEPROCEDURESFIRE, INJURY, OR DEATH HAZARDFailure to follow this warning could result in personalinjury, death and/or property damage.The ability to properly perform maintenance on thisequipment requires certain knowledge, mechanical skills,tools, and equipment. If you do not possess these, do notattempt to perform any maintenance on this equipmentother than those procedures recommended in the User’sManual.! WARNINGELECTRICAL SHOCK, FIRE OR EXPLOSIONHAZARDFailure to follow this warning could result in personalinjury or death, or property damage.Before servicing, disconnect all electrical power to furnace.Verify proper operation after servicing.! WARNINGELECTRICAL OPERATION HAZARDFailure to follow this caution may result in improperfurnace operation or failure of furnace.Label all wires prior to disconnection when servicingcontrols. Wiring errors can cause improper and dangerousoperation.CAUTION!INTRODUCTIONGENERALThese instructions are written as if the furnace is installed in anupflow application. An upflow furnace application is where theblower is located below the combustion and controls section ofthe furnace, and conditioned air is discharged upward. Since thisfurnace can be installed in any of the 4 positions shown in Fig. 4,you must revise your orientation to component locationaccordingly.ELECTRICAL CONTROLS AND WIRINGELECTRICAL SHOCK HAZARDFailure to follow this warning could result in personalinjury or death.There may be more than one electrical supply to thefurnace. Check accessories and cooling unit for additionalelectrical supplies that must be shut off during furnaceservicing.CAUTION!The electrical ground and polarity for 115--v wiring must beproperly maintained. Refer to Fig. 25 for field wiring informationand to Fig. 59 for furnace wiring information.NOTE: If the polarity is not correct, the STATUS LED on thecontrol will flash rapidly and prevent the furnace from heating.The control system also requires an earth ground for properoperation of the control and flame--sensing electrode.The 24--v circuit contains an automotive--type, 3--amp.. fuselocated on the control. (See Fig. 24.) Any shorts of the 24--vwiring during installation, service, or maintenance will cause thisfuse to blow. If fuse replacement is required, use ONLY a 3--amp.fuse. The control LED will display status code 24 when fuseneeds to be replaced.Proper instrumentation is required to service electrical controls.The control in this furnace is equipped with a Status Code LED(Light--Emitting Diode) to aid in installation, servicing, andtroubleshooting. It can be viewed through the sight glass inblower access door. The furnace control LED is either ONcontinuously, rapid flashing, or a code composed of 2 digits. Thefirst digit is the number of short flashes, the second digit is thenumber of long flashes.For an explanation of status codes, refer to service label locatedon blower access door or Fig. 55 and the troubleshooting guidewhich can be obtained from your distributor.See Fig. 60, a brief Troubleshooting Guide.For Controls With an Amber LEDThe stored status code will not be erased from the controlmemory, if 115-- or 24--v power is interrupted.1. To retrieve status code, proceed with the following:NOTE: NO thermostat signal may be present at control, and allblower--OFF delays must be completed.a. Leave 115--v power to furnace turned on.b. Remove outer access door.c. Look into blower access door sight glass for current LEDstatus. Removing blower access door will open bloweraccess door switch and terminate 115--v power to controlso that status code is not displayed.d. BRIEFLY remove insulated terminal wire from the draftsafeguard (DSS) switch until LED goes out, thenreconnect it.NOTE: If wire to LS or DSS is disconnected longer than 4 sec,main blower starts, and retrieval request is ignored.2. When above items have been completed, the LED flashesstatus code 4 times. Record this status code for furthertroubleshooting.3. Check LED status. If no previous faults in history, controlwill flash status code 11.58PHA