Bryant AC Error Codes

AC BrandsBryant

Bryant Ac Error Codes And Troubleshooting Method

Table 19 shows the status codes flashed by the amber status light.Most system problems can be diagnosed by reading the status code as flashed by the amber status light on the control board.
The codes are flashed by a series of short and long flashes of the status light. The short flashes indicate the first digit in the status code, followed by long flashes indicating the second digit of the error code.

Amber Led Flash CodeFaultPossible Cause and Action
On solid, no flashNoneNormal operation
Rapid continuous flashingStandart Thermostat Control 288ANA/180ANA onlyUnit being controlled by standart thermostat inputs instead of Evolution Control. Only high stage operation is aveliable. This operating mode should be used in emergency situations only
1 pauseNoneNormal operation
2 pauseNoneNormal operation
16System Communications FailureCommunication with User Interface lost. Check wiring to UI, indoor and outdoor units
25Invalid Model PlugControl does not detect a model plug or detects an invalid model plug. Unit will not operate without correct model plug
31High Pressure Switch OpenHigh - pressure switch trip. Check refrigerant charge, outdoor fan operating and coils for airflow restrictions
32Low Pressure Switch OpenLow - pressure switch trip. Check refrigerant charge and indoor air flow.
45Control FaultOutdoor unit control board has failed. Control board needs to be replaced.
46Brown Out (230v)Line voltage < 187v for at least 4 seconds.
47No 230v at Unit Measured at L1 and L2 on circuit boardThere is no 230v at the contactor when indoor unit is powered and cooling/heating demand exists.
53Outdoor Air Temp Sensor FaultOutdoor air sensor not reading or out of range.
55Outdoor Coil Sensor FaultCoil sensor not reading or out of range. Ohm out sensor and check wiring.
56Thermistors out of rangeImproper relationship between coil sensor and outdoor air sensor. Ohm out sensor and check wiring.
71Low Stage Thermal Cut outCompressor operation detected then disappears while low stage demand exists. Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long
72High Stage Thermal Cut outCompressor operation detected then disappears while low stage demand exists. Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long
73Contactor ShortedCompressor voltage sensed when no demand for compressor operation exists. Contactor may be stuck closed or there is a wiring error
74No 230v at CompressorCompressor voltage not sensed when compressor should be starting. Contactor may be stuck open or there is a wiring error
75Low Stage Did Not StartSpecified start voltage at VR terminal was not achieved in low stage. Start relay was de-energized after 1 second
76Low Stage Did Not Start 3 timesFor 3 consecutive low stage starts, the specified start voltage at VR terminal was not achieved and start relay was de-energized. Low stage locked out for 30 minutes.
77High Stage Did Not StartSpecified start voltage at VS terminal was not achieved in high stage. Start relay was de-energized after 1 second
78High Stage Did Not Start 3 timesFor 3 consecutive high stage starts, the specified start voltage at VS terminal was not achieved and start relay was de-energized. High stage locked out for 30 minutes
81Low Stage Thermal LockoutThermal cutout occurs in three consecutive low/high stage cycles. Low stage locked out 4 hours or until 24v power recycled
82High Stage Thermal Lockout

Note:

ABOUT SAFETY Any time you see this symbol in manuals, instructions and on the unit, be aware of the potential for personal injury. There are three levels of precaution: DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards that could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

PERSONAL INJURY, DEATH AND / OR PROPERTY DAMAGE HAZARD Failure to follow this warning could result in personal injury, death or property damage. Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or service agency must use factory–authorized kits or accessories when modifying this product. Read and follow all instructions and warnings, including labels shipped with or attached to unit before operating your new air conditioner.

ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Disconnect all electrical power to the indoor air handler or furnace before removing access panels to perform any maintenance. Disconnect power to both the indoor and outdoor units.


Bryant Ac Error Codes & Troubleshooting Of Heat Pumps

Fault: System Communications Failure

Possible Cause And Action: Communication with User Interface lost. Check wiring to User Interface, indoor and outdoor units

Fault: Invalid Model Plug

Possible Cause And Action: Control does not detect a model plug or detects an invalid model plug. Unit will not operate without correct model plug

Fault: High Pressure Switch Open

Possible Cause And Action: High —pressure switch trip. Check refrigerant charge, outdoor fan operation and coils for airflow restrictions

Fault: Low Pressure Switch or Discharge Temp Switch Open

Possible Cause And Action: Low -pressure switch or discharge temperature switch trip. Check refrigerant charge and indoor air flow.

Fault: Control Fault

Possible Cause And Action: Outdoor unit control board has failed. Control board needs to be replaced.

Fault: Outdoor Air Temp Sensor Fault

Possible Cause And Action: Outdoor air sensor not reading or out of range. Ohm out sensor and check wiring

Fault: Outdoor Coil Sensor Fault

Possible Cause And Action: Coil sensor not reading or out of range. Ohm out sensor and check wiring

Fault: Thermistors out of range

Possible Cause And Action: Improper relationship between coil sensor and outdoor air sensor. Ohm out sensors and check wiring

Fault: Low Stage Thermal Cutout

Possible Cause And Action: Compressor operation detected then disappears while low stage demand exists. Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long

Fault: High Stage Thermal Cutout

Possible Cause And Action: Compressor operation detected then disappears while high stage demand exists. Possible causes are internal compressor overload trip or start relay and capacitor held in circuit too long

Fault: Low Stage Thermal Lockout

Possible Cause And Action: Thermal cutout occurs in three consecutive low/high stage cycles.

Low stage locked out for 4 hours or until 24v power recycled

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