Y1 relay failed; operation stopped. Check micro-amperes of the flame sensor using thermostat diagnostics. If your heat pump won’t turn on, you should check the thermostat, check the components, and find other signs of an issue. Check thermopile with millivolt meter. The furnace is in “watchguard” mode (moderate alert) and will not display the red critical alert icon nor be displayed in the homeowner alert button. Notification only - Outdoor Temp is above the High Balance Point. The icomfort thermostat does not dis- play the Model # and or Serial # in- door or outdoor unit. (Outdoor Unit) The outdoor unit pressure is be- low the required limit. To clear, replace filter if needed or repair/add duct. You may need to simply press EDIT. The thermostat will shut down the system. Check accuracy of the thermostat temperature sensor. HVAC Troubleshooting Guide-Rex Miller 2009-02-10 A Practical, On-the-Job HVAC Guide Applicable to residential, commercial, and industrial jobs, this essential handbook puts a wealth of real-world … In the thermostat installer program select the setup button and follow the on screen instructions until you reach the Add or Remove Non- communicating equipment screen; press yes. If less than 70 ohms, check for shorted wires. Determine the actual Software version of the thermostat or one of the icomfort unit controls. With a lower price and higher quality features, it is one of the best thermostats. Cooling operation is not allowed. System will clear code when it detects condition has cleared. If gap does not measure 1/8", replace pilot. Also for: Merit 13hpx-018, Merit 13hpx-024, Merit 13hpx-030, Merit … Learn how to avoid common problems with mini split air conditioners and heat pumps, how to recognize the symptoms and troubleshoot correctly. acquire the lennox heat pump troubleshooting guide link that we have the funds for here and check out the link. Check Installer Setup Number 0170 and make sure correct system type is chosen. • Set the system to Cool by pressing the SYSTEM key. There is an internal hardware problem on the control. The alarm/fault clears after the indoor blower motor starts successfully. (Pilot relay contacts did not close or the relay coil did not energize; no input back to IFC chip). Lennox Heat Pump Troubleshooting The tables below contain the lists of possible breakdowns which may happen with Lennox heat pumps of different modifications. Without the breaker working correctly, you could face an electrical fire or other serious damage. The adjustable system configuration settings are listed in the equipment button under Sys- tem. This alarm/code may indicate transformer overloading. Correct voltage and frequency problems. Merit Series Heat Pump Units. The heat pump is equipped with a compressor crank - case heater which protects the compressor during cold weather operation. (Outdoor Unit) The “W” output on the outdoor unit has reported more than 5 errors. Replace link or hard-wire. See the unit IOM for programming instructions. (Furnace) The furnace rollout limit switch is open. If “Cool On” is shown solidly in the display, but the cooling system does not turn on. Check for proper gas flow. Please program the correct capacity of the (furnace, air-handier or outdoor unit). Pressure switch opens at 590 psig (system shuts down) and closes at 418 psig (system restarts). (Stat) The system has been heating for at least 15 minutes, without a demand for heating. Pressure switch opens at 40 psig (system shuts down) and closes at 90 psig (system restarts). Check for proper configuring under Configuring Electric Heat Stages in the air handler installation instructions. (Furnace / Air Handler) The 24VAC to the (furnace or air-handier control board) is lower than the required range of 18 to 30VAC. If problem persists, then check all DEVICE connections to make sure they are icomfort-compatible. Check to ensure that cooling equipment is not stuck ON. This alarm/code may require the installation of an addition- al or larger VA transformer. And it is normal for the entire coil to be covered in a white frost, even light ice, during certain weather conditions. Cut the “W915 2 Stage Compr” option link on the furnace or air handler control. On the home screen, press the right arrow Q3 then press the display settings button. Verify operation of equipment in System Test mode. Recycle power. Typically the control will re-set itself. (Pilot relay contacts did not close or the relay coil did not energize; no input back to IFC chip). Check for a gas valve leak. Upper or lower temperature limits were reached. Check for other alarms/codes that may be preventing the system from operating as expected. This is just one of the solutions for [Indicated unif\ has not communicated with thermostat for more than 3 minutes. (Furnace) The furnace high pressure switch is failing to close. (Stat) The thermostat does not know the capac- ity (tonnage) of the (furnace, air-handier or out- door unit). Everything for service of consumers! Just invest little become old to admittance this on-line message lennox heat pump troubleshooting guide as well as review them wherever you are now. Warning Only. The alarm/fault is cleared 300 seconds after the fault recovers. Replace the hot surface ignitor it is not within specifications. Remove the thermostat from the system while applying power and reprogramming. Do the following to prevent or reduce the risk of heat pump not defrosting issue: Remove leaves and debris from the outdoor coil. Reconfigure system. Perfect comfort is something we want you to experience long after you’ve purchased your Lennox ® product. Follow the red instructions then exit the system. Key to the right of the screen key is blank. The icomfort does not display an alert code message, but the furnace or unit control displays a diagnostic code. Fan does not turn on in a call for heat (electric furnaces only). We built our home in 2012 and installed a new Lennox heat pump. Check the control panel of the Lennox heat pump. Check the generator operating frequency, if the system is running on back-up power. Press the setup tab, press start, and press confirm. Replace the control if the problem prevents operation and is persistent. The system will not use the heat pump to warm your home. Furnace blower in cutback mode due to restricted airflow. Heating system does not turn off and the heat temperature setting is set below the room temperature (’’Heat On” is not shown in display.). Wait up to 5 minutes for the system to respond. Unit pressures are below the lower limit. Clears the error after 30 consecutive normal run cycles or power reset. An unknown device is seen on the subnet in or outside of configuration mode. The installer adjustable settings used to configure the system are not listed in the equipment button under the Thermostat 49W95 (only Temp Reading Calibration and Humidity Reading Calibration are listed as menu items). (Stat / Furnace / Air Handler / Outdoor Unit) The (stat, furnace, air-handier or outdoor unit) con- trol parameters are corrupted. Also for: Hp22-311, Hp22-411, Hp22-461. If a Heat Pump, and if outdoor temp is less than 65 degrees, code is ignored. (Air Handler) The air handler control software is corrupted. A/C-Heat Pump System Troubleshooting Guide Before using this guide: 1) Make sure all filters, blower, and coils are clean. Perfect comfort is something we want you to experience long after you’ve purchased your Lennox ® product. If 24 Vac is present, the thermostat is functional. The variable capacity Lennox heat pump premium model means you get a modulating heat pump. Indoor temperature rose above 99?F during a heating or cooling demand. If the compressor does not work well, or malfunctions, it would be impossible for your heat pump to operate either way (that is, hot or cold). The non-communicating outdoor unit is part of the system, but the thermo- stat does not display the outdoor unit. Incorrect appliance unit size code selected. Press the setup tab, press start, and press confirm. Discharge line temperature is > 279?F. Either the pilot relay contacts did not close, or the relay coil in the electric heat section did not energize. 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