| Climate Talk Fault Code | Transmitted message | Dealer error message | Possible Causes | Corrective Actions | Alarm Status | Unit Type | Consumer error message | Notes | ||||
| b0 | MOTOR NOT RUN | Blower motor not running | •Loose
wiring connection at circulator motor power leads or circulator power leads
disconnected. •Open circuit in inductor or loose wiring connection at inductor(3/4 Hp & 1 Hp models only). •Failed circulator blower motor. |
•Tighten
or correct wiring connection •Verify continuous circuit through inductor. Replace if open or short circuit. •Check circulator blower motor. Replace if necessary. |
Critical | furnace | Fan Failure | |||||
| b1 | MOTOR COMM | Blower communication error | •Loose
wiring connection at circulator motor control leads. •Failed circulator blower motor. •Failed integrated control module. |
•Tighten
or correct wiring connection. •Check circulator blower motor. Replace if necessary. •Check circulator integrated control module. Replace if necessary |
Critical | furnace | Communication Error | |||||
| b2 | MOTOR MISMATCH | Blower motor HP mismatch | •Incorrect
circulator blower motor in furnace. •Incorrect shared data set in integrated control module. |
•Verify
circulator blower if motor horse power is the same specified for the specific
furnace model. Replace if
necessary. •Verify shared data set is correct for the specific model. Re-populate data using correct memory card if required. |
Critical | furnace | Fan Failure | |||||
| b3 | MOTOR LIMITS | Blower motor is operating in a power, temperature, or speed limiting condition | •Blocked
filters. •Restrictive ductwork. •Undersized ductwork. •High ambient temperatures. |
•Check
filters for blockage. Clean filters or
remove obstructions. •Check ductwork for blockage. Remove obstruction. Verify all registers are fully open. •Verify ductwork is appropriately sized for system. Resize/replace ductwork if necessary. •See "III. Product Description" and "IV. Location Requirements & Considerations" furnace installation requirements. |
Critical | furnace | Fan Failure | |||||
| b3 | MOTOR LIMITS | Blower motor is operating in a power, temperature, or speed limiting condition | •Blocked
filters. •Restrictive ductwork. •Undersized ductwork. •High ambient temperatures. |
•Check
filters for blockage. Clean filters or
remove obstructions. •Check ductwork for blockage. Remove obstruction. Verify all registers are fully open. •Verify ductwork is appropriately sized for system. Resize/replace ductwork if necessary. •See "Product description" and "Location Requirements & Considerations" for furnace installation requirements. |
minor | furnace | Fan Failure | |||||
| b4 | MOTOR TRIPS | Blower motor current trip or lost rotor position | •Abnormal motor loading, sudden change in speed or torque, sudden blockage of furnace air inlet or outlet. | •Check filters, filter grills/registers, duct system, and furnace air inlet/outlet for blockages. | Critical | furnace | Fan Failure | |||||
| b5 | MTR LCKD ROTOR | Blower motor locked rotor | •Obstruction
in circulator blowing housing •Seized circular blower motor bearings •Failed circular blower motor |
•Check
circulator blower for obstructions.
Remove and repair/replace wheel/motor if necessary. •Check circular blower motor shaft rotation and motor. Replace motor if necessary. |
Critical | furnace | Fan Failure | |||||
| b6 | MOTOR VOLTS | Voltage or temperature trip | •High
AC line voltage to furnace •Low AC line voltage to furnace •High ambient temperatures |
•Check
power to furnace. Verify line voltage
to furnace is within the range specified on the furnace rating plate. •See"III. Product Description" and "IV. Location Requirements & Considerations" furnace installation requirements. |
Critical | furnace | System error | |||||
| b7 | MOTOR PARAMS | Incomplete parameters sent to motor | •Error
with integrated control module •Motor has a locked rotor condition |
•Check
integrated control module. Verify
control is populated with correct shared data set. See data errors above for details. •Check for locked rotor condition (see error code above for details). |
Critical | furnace | System error | |||||
| b9 | LOW ID AIRFLOW | Low indoor airflow | •Blocked
filters •Restrictive ductwork •Undersized ductwork |
•Check
filter for blockage. Clean filters or
remove obstructions. •Check ductwork for blockage. Remove obstructions. Verify all registers are fully open. •Verity ductwork is appropriately sized for system. Resize/replace ductwork if necessary |
minor | furnace | Fan Failure error | |||||
| bf | Inducer Communication Alarm | Critical | furnace | System error | ||||||||
| c0 | Unit Missing | Critical | furnace | System error | ||||||||
| c1 | ClimateTalk Network Communication Alarm | Critical | furnace | System error | ||||||||
| c2 | Unrecognized Command | Critical | furnace | System error | ||||||||
| c3 | Unrecognized Data ID | Critical | furnace | System error | ||||||||
| c4 | Invalid DataAC Downloaded Shared Data | Critical | furnace | System error | ||||||||
| c5 | Invalid Downloaded Firmware | Critical | furnace | System error | ||||||||
| d0 | NO NET DATA | Data not yet on network | •Furnace does not contain any shared data | •Populate shared data set using memory card | Critical | furnace | System error | |||||
| d1 | INVALID DATA | invalid data on network | •Air conditioner is wired as part of a communicating system and integrated control module does contain any shared data | •Replace control board if necessary | Critical | furnace | System error | |||||
| d2 | Invalid system combination | Critical | furnace | System error | ||||||||
| d4 | INVALID MC DATA | Invalid memory card data | •Shared data set on memory card has been rejected by integrated control module | •Verify shared data set is correct for the specific model. Re-populate data using correct memory card is required. | Critical | furnace | System error | |||||
| d5 | No Cooling Unit Installed | minor | furnace | System error | ||||||||
| d6 | No De-Humidifier Installed | minor | furnace | System error | ||||||||
| d7 | Wrong Legacy T-Stat Setup Alarm | minor | furnace | System error | ||||||||
| E0 | LOCKOUT | Lockout due to excessive ignition attempts | •Failure
to establish flame. Cause may be no
gas to burners, front cover pressure switch stuck open, bad igniter or
igniter alignment, improper orifices, or coated/oxidized or improperly
connected flame sensor. •Loss of flame after establishment. Cause may be interrupted gas supply, lazy burner flames (improper gas pressure or restriction in fuel and/or combustion air piping), front cover pressure switch opening, or improper induced draft blower performance. |
•Locate
and correct gas interruption. •Check front cover pressure switch operation (hose, wiring, contact operation). Correct if necessary. •Replace or realign igniter. •Check flame sensor signal. Clean sensor if coated and/or oxidized. •Check fuel piping for blockage, proper length, elbows, and termination. •Verify proper induced draft blower performance. |
Critical | furnace | Safety error | |||||
| E1 | PS1 CLOSED | Low stage pressure switch closed at start of heating | •Low
stage pressure switch contacts sticking. •Shorts in pressure switch circuit wiring. |
•Preplace
low stage pressure switch. •Repair short in wiring. |
Critical | furnace | Pressure error | |||||
| E2 | PS1 OPEN | Low stage pressure switch open during heating | •Pressure
switch hose blocked, pinched, or connected improperly. •Blocked flue and/or inlet air pipe, blocked drain system or weak induced draft blower. •Incorrect pressure switch set point or malfunctioning switch contacts. •Loose or improperly connected wiring. |
•Inspect
pressure switch hose. Repair/replace
if necessary. •Inspect flue and/or inlet air piping for blockage, proper length, elbows, and termination. Check drain system. Correct as necessary. •Correct pressure switch set point or contact motion. •Tighten or correct wiring connection. |
Critical | furnace | Pressure error | |||||
| E3 | HIGH LIMIT OPEN | Open high limit switch | •Insufficient
conditioned air over the heat exchanger.
Blocked filters, restrictive ductwork, improper circulator blower
speed, or failed circulator blower motor. •Flame rollout. •Misaligned burners, blocked fuel and/or air inlet pipe, or failed induced draft blower. •Loose or improperly connected wiring. |
•Check
filters and ductwork for blockage.
Clean filters or remove obstruction. •Check circulator blower speed and performance. Correct speed or replace blower motor if necessary. •Check burners for proper alignment. •Check fuel and air inlet piping for blockage, proper length, elbows, and termination. Correct if necessary. •Check induced draft blower for proper performance. Replace if necessary. •Tighten or correct wiring connection. |
Critical | furnace | Safety error | |||||
| E4 | INPROPER FLAME | Flame detected when no flame should be present | •Short
to ground in flame sensor circuit. •Lingering burner flame. •Slow closing gas valve. |
•Correct
short at flame sensor or in flame sensor wiring. •Check for lingering flame. •Verify proper operation of gas valve. |
Critical | Safety error | ||||||
| E5 | BLOWN FUSE | Blown fuse on PCB | •Short in low voltage wiring. | •Locate and correct short in low voltage wiring. | Critical | System error | ||||||
| E6 | WEAK FLAME | Low flame signal | •Flame
sensor is coated/oxidized. •Flame sensor incorrectly positioned in burner flame. •Lazy burner flame due to improper gas pressure or combustion sir. |
•Clean
flame sensor if coated/oxidized. •Check inlet air piping for blockage, proper length, elbows. And termination. •Compare current gas pressure to rating plate. Adjust if needed. •Inspect for proper sensor alignment. |
Critical | System error | ||||||
| E7 | IGNITER FAULT | Igniter fault or improper grounding | •Improperly
connected igniter. •Shorted igniter. •Poor unit ground. •Igniter relay fault on integrated control module. |
•Check
and connect wiring from integrated control module to igniter. •Replace shorted igniter. •Check & correct unit ground wiring. •Check igniter output from control. Replace if necessary. |
Critical | System error | ||||||
| E8 | PS2 CLOSED | High stage pressure switch stuck closed | •High
stage pressure switch contacts sticking. •Shorts in pressure switch circuit wiring. |
•Replace
high stage pressure switch. •Repair short in wiring. |
Critical | Pressure error | ||||||
| E9 | PS2 OPEN | High stage pressure switch stuck open | •Pressure
switch hose blocked, pinched, or connected improperly. •Blocked flue and/or inlet air pipe, blocked drain system or weak induced draft blower. •Incorrect pressure switch set point or malfunctioning switch contacts. •Loose or improperly connected wiring. |
•Inspect
pressure switch hose. Repair/replace
if necessary. •Inspect flue and/or inlet air piping for blockage, proper length, elbows, and termination. Check drain system. Correct as necessary. •Correct pressure switch set point or contact motion. •Tighten or correct wiring connection. |
Critical | Pressure error | ||||||
| EA | REVERSED PLTY | Reversed 115VAC polarity | •Polarity
of 115 volt AC power to furnace or integrated module is reversed. •Poor unit ground. |
•Review
wiring diagram to correct polarity. •Verify proper ground. Correct if necessary. •Check and correct wiring. |
Critical | Safety error | ||||||
| EB | Internal Gas Valve Error | Critical | System error | |||||||||
| EC | External Gas Valve Error | Critical | System error | ULN furnace only, keyed off of “ctIFCNoofGasHeatStages” = '1'; | ||||||||
| EC | INDUCER FAULT | Inducer motor current fault | •Lingering Inducer motor overcurrent detected. | •Reset
system power and verify inducer is running properly. •Replace inducer or integrated control module, if necessary. |
Critical | Safety error | Other furnaces, keyed off of “ctIFCNoofGasHeatStages” > '1'; This will change in the future when other Comforbridge furnace boards are rolled into the Daikin line. | |||||
| Ed | ROLLOUT OPEN | Flame rollout switch is open | •Orifice
plate out of position. •Blocked heat exchanger. •Burners out of alignment. •Defective heat exchanger. |
•Line
up orifice plate. •Remove blockage from heat exchanger. •Line up burners. •Check for flame disturbance on roll out when burner comes on. |
Critical | Safety error | ||||||
| EE | Internal Control Fault | Critical | System error | |||||||||
| EF | AUX ALARM FAULT | Auxiliary input open | •High water level in the evaporation coil. | •Check overflow pan and service. | Critical | System error | ||||||
| 10 | Grounding Error | Critical | System error | |||||||||
| 11 | Rollout Switch Open | Critical | System error | |||||||||
| 12 | Redundant Relay Open Alarm | Critical | System error | |||||||||
| 13 | Redundant Relay Stuck Close Alarm | Critical | System error | |||||||||
| 14 | Read or Write to External Flash Fails | Critical | System error | |||||||||
| 15 | RAT Sensor Open | minor | Sensor error | |||||||||
| 16 | RAT Sensor Short | minor | Sensor error | |||||||||
| 17 | SAT Sensor Open | minor | Sensor error | |||||||||
| 18 | SAT Sensor Short | minor | Sensor error | |||||||||
| 19 | Board Temperature Sensor Open | minor | System error | |||||||||
| 1A | Board Temperature Sensor Short | minor | System error | |||||||||
| 1B | APS Refence Error | Critical | System error | |||||||||
| 1C | APS Null Error | Critical | System error | |||||||||
| 1D | APS Span Error | Critical | System error | |||||||||
| 1E | APS Pressure Error | Critical | System error | |||||||||
| 1F | APS Input Error | Critical | System error | |||||||||
| 76 | Equipment communication loss | Critical | Communication Error | |||||||||
| 77 | Thermostat communication loss | Critical | Communication Error | |||||||||
| 78 | Need to connect outdoor unit | Critical | System Error |