Payne Air Conditioner Troubleshooting

The malfunctions of the air conditioners listed in the table are the most frequent ones. The symptoms of the problems are listed in the first column. A simple breakdown can be fixed independently with the help of recommendations.

Compressor and condenser fan will not start.Power failureCall power company.
Fuse blown or circuit breaker trippedReplace fuse or reset circuit breaker.
Defective thermostat, contactor, transformer, or control relayReplace component.
Insufficient line voltageDetermine cause and correct.
Incorrect or faulty wiringCheck wiring diagram and rewire correctly.
Thermostat setting too highLower thermostat setting below room temperature.
Compressor will not start but condenser fan runs.Faulty wiring or loose connections in compressor circuitCheck wiring and repair or replace.
Compressor motor burned out, seized, or internal overload openDetermine cause. Replace compressor.
Defective run/start capacitor, overload, start relayDetermine cause and replace.
One leg of 3-phase power deadReplace fuse or reset circuit breaker. Determine cause.
Three-phase scroll compressor (Unit sizes 048,060 only) makes excessive noise, and there may be a low pres- sure differential.Scroll compressor is rotating in the wrong directionCorrect the direction of rotation by reversing the 3-phase power leads to the unit. Shut down unit to allow pressures to equalize.
Compressor cycles (other than normally satisfying thermostat).Refrigerant overcharge or underchargeRecover refrigerant, evacuate system, and recharge to capacities shown on nameplate.
Defective compressorReplace and determine cause.
Insufficient line voltageDetermine cause and correct.
Blocked condenserDetermine cause and correct.
Defective run/start capacitor, overload or start relayDetermine cause and replace.
Defective thermostatReplace thermostat.
Faulty condenser-fan motor or capacitorReplace.
Restriction in refrigerant systemLocate restriction and remove.
Compressor operates continuously.Dirty air filterReplace filter.
Unit undersized for loadDecrease load or increase unit size.
Thermostat set too lowReset thermostat.
Low refrigerant chargeLocate leak, repair, and recharge.
Leaking valves in compressorReplace compressor.
Air in systemRecover refrigerant, evacuate system, and recharge.
Condenser coil dirty or restrictedClean coil or remove restriction.
Excessive head pressure.Dirty air filterReplace filter.
Dirty condenser coilClean coil.
Refrigerant overchargedRecover excess refrigerant.
Air in systemRecover refrigerant, evacuate system, and recharge.
Condenser air restricted or air short-cyclingDetermine cause and correct.
Head pressure too low.Low refrigerant chargeCheck for leaks, repair and recharge.
Compressor valves leakingReplace compressor.
Restriction in liquid tubeRemove restriction.
Excessive suction pressure.High heat loadCheck for source and eliminate.
Compressor valves leakingReplace compressor.
Refrigerant overchargedRecover excess refrigerant.
Suction pressure too low.Dirty air filterReplace filter.
Low refrigerant chargeCheck for leaks, repair and recharge.
Metering device or low side restrictedRemove source of restriction.
Insufficient evaporator airflowIncrease air quantity. Check filter — replace if necessary.
Temperature too low in conditioned areaReset thermostat.
Outdoor ambient below 40 FInstall low-ambient kit.
Field-installed filter-drier restrictedReplace.
Bumers will not ignite.Water in gas lineDrain. Install drip leg.
No power to furnaceCheck power supply fuses, wiring, or circuit breaker.
No 24-v power supply to control circuitCheck transformer.
NOTE: Some transformers have internal overcurrent protection that requires a cool-down period to reset.
Miswired or loose connectionsCheck all wiring and wirenut connections.
Burned-out heat anticipator in thermostatReplace thermostat.
Broken thermostat wireRun continuity check. Replace wire if necessary.
Misaligned spark electrodesCheck flame ignition and sense electrode positioning. Adjust as necessary.
No gas at main burners1. Check gas line for air. Purge as necessary.
NOTE: After purging gas line of air, wait at least 5 minutes for any gas to dissipate before attempting to light unit.
2. Check gas valve.
Inadequate heating.Dirty air filterClean or replace filter as necessary.
Gas input to furnace too lowCheck gas pressure at manifold. Match with that on unit nameplate.
Unit undersized for applicationReplace with proper unit or add additional unit.
Restricted airflowClean or replace filter. Remove any restriction.
Blower speed too lowUse faster speed tap if available, or install alternate motor.
Limit switch cycles main burnersCheck rotation of blower, thermostat heat antic- ipator settings, temperature rise of unit. Adjust as necessary.
Poor flame characteristics.Incomplete combustion results in: Aldehyde odors, carbon monoxide, sooting flame, floating flame1. Tighten all screws around burner compartment.
2. Cracked heat exchanger. Replace.
3. Unit overfired. Reduce input (change orifices or adjust gas line or manifold pressure).
4. Check burner alignment.
Hardware failure. (LED OFF)Loss of power to control module (IGC).Check 5 amp fuse on IGC, power to unit, 24-v circuit breaker, and transformer. Units without a 24-v circuit breaker have an internal overload in the 24-v trans- former. If the overload trips, allow 10 minutes for automatic reset.
Limit switch fault. (LED 2 flashes)High temperature limit switch is open.Check the operation of the indoor (evaporator) fan motor. Ensure that the supply-air temperature rise is in accordance with the range on the unit nameplate.
Flame sense fault. (LED 3 flashes)The IGC sensed flame that should not be present.Reset unit. If problem persists, replace control board.
4 consecutive limit switch faults. (LED 4 flashes)Inadequate airflow to unit.Check operation of indoor (evaporator) fan motor and that supply-air temperature rise agrees with range on unit nameplate information.
Ignition lockout. (LED 5 flashes)Unit unsuccessfully attempted ignition for 15 minutes.Check ignitor and flame sensor electrode spacing, gaps. etc. Ensure that flame sense and ignition wires are properly terminated. Verify that unit is obtaining proper amount of gas.
Induced-draft motor fault. (LED 6 flashes)IGC does not sense that induced- draft motor is operating.Check for proper voltage. If motor is operating, check the speed sensor plug/IGC Terminal J2 connection. Proper connection: PIN 1 — White, PIN 2 — Red. PIN 3 — Black.
Rollout switch fault. (LED 7 flashes)Rollout switch has opened.Rollout switch will automatically reset, but IGC will continue to lockout unit. Check gas valve operation. Ensure that induced-draft blower wheel is properly secured to motor shaft. Reset unit at unit disconnect.
Internal control fault. (LED 8 flashes)Microprocessor has sensed an error in the software or hardware.If error code is not cleared by resetting unit power, replace the IGC.