Carrier 58MTA User's Information Manual

Also see for GAS FURNACE 58MVP: Installation, start-up, and operating instructions User's information manual User manual User's information manual User's information manual

Contents

Carrier 58MTA User's Information Manual Manual pdf 11 page image

11• Inspect and clean the blower motor and wheel.NOTE: The inducer and blower motors are pre-lubricated andrequire no additional lubrication. These motors can be identifiedby the absence of oil ports on each end of the motor.• Inspect and change or clean air filters(s) if necessary.• Inspect all supply-and return-air ducts for obstructions, airleaks, and insulation. Remedy any problem when necessary.• Inspect the return-air duct connections(s) at the furnace to en-sure it is physically sound, sealed to the furnace casing, and ter-minates outside the space containing the furnace.• Inspect electrical wiring, connections, and components forloose connections.• Perform an operational checkout to determine whether yourfurnace is working properly and if it requires adjustments.• Inspect all condensate drain tubes and condensate trap assem-bly for leaks. The condensate removal system should be cleanedannually by a qualified service agency. Refer to the Service andMaintenance Instructions for further information.• Examine the physical support of the furnace. Support shouldbe sound with not cracks, sagging, gaps, etc. around the base.• Check furnace for any obvious signs of deterioration.BEFORE YOU REQUEST A SERVICECALLIf your furnace is not operating or not performing properly,you may save the expense of a service call by checking a fewthings yourself before calling for service.FOR INSUFFICIENT AIRFLOW:• Check for dirty air filter(s).• Check for blocked return-air or supply-air grilles throughoutyour home. Ensure they are open and unobstructed.If problem still exists, call your dealer for service.IF FURNACE FAILS TO OPERATE:Follow this checklist step by step, advancing to the next steponly if furnace fails to start.• Check thermostat for proper temperature. Is thermostat setabove room temperature?• Is thermostat set on HEAT?• Check fuses and circuit breakers. Is electrical supply on?• Is manual shutoff valve in gas supply pipe in open position?(Follow start-up procedures if you open gas valve.)NOTE: Turn off electrical supply before continuing withchecklist.• Is control switch or knob on gas valve in ON position? (Fol-low start-up procedures if you must reset switch or knob to ONposition.)• Check manual reset flame rollout switch located on the burnerbox. (See Fig. 3 or 4.) if furnace has experienced high temper-ature conditions, this switch will shut off the furnace. reset it bypushing the button on the switch. If it trips again, shut down thefurnace and call for service. See “Shutting Down Your Furnace”section in this manual.• Check for obstructions around the vent termination.If the furnace still fails to operate, call your service representa-tive.For your convenience, record the furnace product and serialnumbers on page 2. should you ever require service, you willhave ready access to the information needed by your servicerepresentative.This furnace has an LED operation and fault code display to aidthe installer, service technician, or homeowner while installingor servicing the unit. The LED code can be seen by removingthe main furnace door and viewing the LED(s) through the viewport in the blower access panel.NOTE: Removing the blower access panel or turning off the115-v electrical power supply will terminate LED diagnosticcode display.To decipher the meaning of the LED code, and suggestedaction, the following cross-reference can be used.MODEL 58MCA and 58MXA DIAGNOSTIC CHART(See Fig. 3.)NOTES:1. Light on continuously means control has power and working properly.2. The fault code is a 2 digit number. The first digit is determined by the number of short flashes of the light and the second digit is determined by number of longflashes of the light.FAULTCODE FAULT CODE DESCRIPTION CHECKLIST13 or 33 Limit Switch Lockout Check for dirty air filter.Check for blocked return-air or supply-air grilles.14 or 34 Ignition Lockout orIgnition Proving FaultCheck to be sure manual shutoff valve in gas supply pipe is in the open position. (Followstart-up procedure if you open gas line.)NOTE: Turn off the electrical supply and remove access doors before continuing with thischecklist.Check to be sure control switch or knob on gas valve is in ON position. (Follow start-upprocedures if you must reset switch or knob to ON position.)24 Furnace Fuse Open Check for blown fuse and possible short in 24-v wiring.31 Pressure Switch Not ClosedCheck to make sure that all PVC pipes leading into the combustion-air intake and vent/exhaust are free from any cracks and sags. Also check the combustion-air intake adjacent tothe furnace and vent/exhaust pipe on the outside of your home for blockage.Check for low propane gas pressure.12, 21, 22,or 23 Any Other Fault Code Call dealer for service.No FaultCodeSignaledFurnace Fails to Operate and NoFault is SignaledCheck thermostat for proper temperature setting.Check for blown fuses and circuit breakers.Check to be sure blower access panel is properly in place.