Fault: Low Pressure Switch or Discharge Temp Switch Open. Faulty outdoor-fan (cooling) or indoor-fan (heating) motor or capacitor. But this is how you would go about diagnosing one of these fancy VARIABLE SPEED inverter heat pumps\\a/c units. Fault: Control Fault. OFF is shown in thermostat display and heating or cooling system will not start. To reset: Put setup switch "SW-1" in the "ON" position nad jumper thermostat terminals "R", "W/Wl" and "Y/Y2" simultaneously with the door switch pushed in and power to the unit "ON". Related Manuals for Bryant 189BNV EVOLUTION. Compressor rotating in the wrong direction (unit sizes 048, 060 and 072). The Bryant Evolution® control can direct an entire advanced home comfort system to let you precisely manage comfort, humidity, ventilation and air purification from one source. Make sure to verify AM/PM indicator is accurately displaying desired time settings. View solutions. 2. Check for ^Improper or misaligned limit and/or limit shield. Make sure all colors match for every terminal. The house gets cold is one symptom. It is possible that AC power is not present at the thermostat and the back-up batteries are fully discharged. - Check for blown fuse and possible short in 24-v wiring. Review the CHECK status indicator light to see if it is lit. Check for 24VAC between the C and D terminal connector of outdoor unit. 1. The zone airflow limit may be set too low. Status Code 42 - Inducer Motor Fault. After the compressor short cycle protection 5-minute period expires the system should start within several seconds. Replace fuse or reset circuit breaker. It is ozone-friendly and is very quiet in its processes. 4 possible causes and potential solutions . If a minimum of 18 vdc is present and the motor is still not operating, replace the motor. (Follow start-up pro- cedures if you must reset switch or knob to ON position.). Most Common Problems. Auto reset after three hours. Thermostat will not allow me to program a setpoint temperature lower than 45° F (7° C). If this fault occurs in conjunction with fault #44 check wiring to motor otherwise. This Bryant forced-air, natural gas furnace that's about 2 years old. Verify that SW2 and SW4 are wired and working properly. Compressor cycles (other than normally satisfying thermostat). The thermostat is equipped with a mechanical high temperature safety switch that will turn off the system should the temperature exceed 99“ F (37* C). Furnace not heating. Defective run/start capacitor, overload, start relay. INVALID BLOWER AIRFLOW SELECTION- Indicates improper "A/C" or "CF" switch setting. HI is shown in the thermostat display where the room temperature is normally displayed. min., 4.0 - 6.0 nominal). Blocked outdoor coil or dirty air filter. Bryant Heat Pump Thermostat: Bryant heat pump is an effective tool in spending cool summers and warm winters with the best comfort. How do I get back to start-up? Our product manuals are by no means "light" reading, but, along with our Bryant ® dealers, they are a great heavy-duty resource for any questions you may have. Place a call for Y1 and open the damper to the fully open position. Check whether 24 vac is present at PL6-1 (red wire) and/or PL6-3 (black wire). Status Code 33 - Limit Circuit Fault. 1. Ignition Lockout or Ignition Proving Fault, - Check to be sure manual shutoff valve in gas supply pipe is in the open position. Code 72 usually has to do with start components. If not, Disconnect all wires . Economizer control board incorrectly wired or not functioning. Status Code 35 - Gas Valve Fault ..... 31 Status Code 41 - Blower Motor Fault ..... 33 Status Code 42 - Inducer Motor Fault ..... 35 Status Code 43 - Low or Medium Pressure Switch Open While Blower will run for 4 minutes or until open switch remakes whichever is longer.
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