SYSTEMMALFUNCTIONSCREEN
OUTSIDE: 84 ° I FAN: AUTO
71 °
HVAC SERVICE
1-800-555-1212
Fig. 28 - System Malfunction Screen
A04028
FAN COIL
(;ode 37 - Heater output sensed On when not energized
(;ode 41 - Blower Motor Fault (ventilator, humidifier,
dehumidifier, outdoor unit will be turned oft)
Code 44 - Motor Communication Fault (ventilator, humidifier,
dehumidifier, outdoor unit will be turned off)
(:ode 45 - Control failure
FURNACE
(;ode 13 - Limit Circuit Lockout
(;ode 14 - Ignition Lockout
Code 15 - Blower Motor Lockout (ventilator, humidifier,
dehumidifier, outdoor unit will be turned off)
Code 21 - Gas Heating Lockout
(;ode 22 - Abnormal Flame Proving Signal
(;ode 23 - Pressure Switch Did Not Open
Code 24 - Secondary Voltage Fuse Open
Code 33 - Limit Circuit Fault AND high heat only is active
Code 41 - Blower Motor Fault (cooling mode only) (ventilator,
humidifier, dehumidifier, outdoor unit will be turned off)
Code 45 - Control Circuitry Lockout
NOTE:For codes 13.14 and 21, the system will use heat pump
heating exclusively if available. When the error code is cleared or
disappears, furnace heating will resume if still requested.
OUTDOOR UNIT
Code 25 - Invalid model plug
Code 45 - Control Failure
Code 47 - No 230V at unit
Code 73 - Contactor shorted
Code 74 - No high voltage at compressor
Code 76 - Low stage didn't start three times
Code 78 - High stage didn't start three times
Code 81 - Thermal lockout in low stage - 4 hrs.
Code 82 - Thermal lockout in high stage - 4 hrs.
Code 83 - Low Pressure Lockout - 4 hrs.
Code 84 - High Pressure Lockout - 4 hrs.
Code 85 - Low contactor open
Code 86 - Low contactor shorted
Code 87 - High contactor open
USER INTERFACE
• Temp sensor failed, loss of communication with smart
sensor, smart sensor fault. "NO SENSOR DATA"
shown
• Indoor unit communication fault
• Outdoor unit communication fault
• Packaged product communication fault
• NIM communication fault
• SAM communication fault
• Possible Frozen Coil
The user can press the right side button to dismiss the notice. The
regular run mode screen will then appear except "SYSTEM
MALFUNCTION" will appear in place of the day/time. If the error
has not disappeared within 24 hours, the above display will return.
If the error code disappears, "SYSTEM MALFUNCTION" will
disappear and the day/time will reappear.
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