Check the accuracy of the thermostat temperature sensor. Check to ensure that bare portions of wires are not touching. The sys- tem will go offline for 60 minutes and try again. (Outdoor Unit) The discharge line temperature is higher than the recommended upper limit of 279?F. The troubleshooting guide is the DIY guide published to help homeowners maintain, repair the unit and save money. Air handler will operate on 1st stage for reminder of the heat call. (Basic is the most popular) and press the save button. Under normal conditions, your heat pump periodically switches to air conditioning mode for a few minutes, which heats up the outdoor coils enough to melt any frost and light ice that has accumulated. Lennox Heat Pump Troubleshooting Guide Author: www.diamondbackmtb.com-2021-01-16T00:00:00+00:01 Subject: Lennox Heat Pump Troubleshooting Guide Keywords: lennox, heat, pump, troubleshooting, guide Created Date: 1/16/2021 9:13:10 PM (Air Handler) The heat pump defrost cycle has taken more than 20 minutes to complete. (Furnace / Air Handler) The “Y1” relay on the (furnace or air-handier) has failed. On 12-09, I had to replace the float switch and transformer for UV light. Cut O-R. Applicable with non communicating outdoor unit with communicating indoor system. Also for: Hp22-311, Hp22-411, Hp22-461. Select “Sys- tem" from the device list using the up/down arrows and press the edit button. Heating or cooling equipment is not operating. This lennox heat pump troubleshooting guide, as one of the most enthusiastic sellers here will utterly be in the midst of the best options to review. Press the setup tab, press start, and press confirm. Critical Alert. Outdoor temperature is not displayed on the thermostat. Either the pilot relay contacts did not close or the relay coil did not energize. Step 1: Check all heating equipment to determine cause. Check for proper gas flow. From the home screen click the right arrow QD then click service info button; then click the thermostat info button; (display shows model & serial numbers and hardware, software, Wi-Fi revision information). System will clear code when it detects condition has cleared. System reset is required to recover. Some or all keys on the display do not work; why not? Discharge or suction pressure out-of-limits, or compressor overloaded. If power to your unit has been interrupted for several hours or more, set the room thermostat selector to the EMERGENCY HEAT setting to obtain temporary heat without the risk of serious damage to the heat pump. Wait up to 5 minutes for the system to respond. Equipment lost communication with the thermostat. The alarm/fault clears after blower demand is satisfied. Check for additional power- robbing equipment connected to system. Lennox Thermostats Troubleshooting lennox-heat-pump-troubleshooting-guide 1/2 Downloaded from calendar.pridesource.com on November 12, 2020 by guest [DOC] Lennox Heat Pump Troubleshooting Guide Yeah, reviewing a book lennox heat pump troubleshooting guide could mount up your near friends listings. Make sure the router and modem are turned on. See the unit IOM for programming instructions. Configuration jumpers) missing on control (applicable in non-communicating applications only). Inspect vent and combustion air inducer for correct operation and restriction. Use the Ducane heat pump troubleshooting guides below. Critical Alert. Replace thermostat, if needed. (Stat) The outside temperature is below the lev- el where the heat pump is programmed to heat the home. Check motor bearings and amps. HP22-261 heat pump pdf manual download. Check for miswired and/or loose connections between the stat, indoor unit and outdoor unit. Check system charge using approach and sub cooling temperatures. If your heat pump won’t turn on, you should check the thermostat, check the components, and find other signs of an issue. Inspect vent and combustion air inducer for correct operation and restriction. The alarm/fault clears after the issue is corrected. Step 1: Check all heating equipment to determine cause of heating demand. Provide proper earth ground to the equipment. • Set the system to heat by pressing the SYSTEM key. Heating system does not turn off and the heat temperature setting is set below the room temperature (’’Heat On” is not shown in display.). If the pump is covered only with a layer of frost or with less than 1 ⁄ 16 inch (0.16 cm) of ice, it can defrost itself. When turning on the burner using a 'remote switch, ensure that the standard OFF/ON switch is in the "OFF" position. The alarm/fault is cleared after the current service demand is satisfied. Provide proper earth ground to the equipment. (Stat / Furnace / Air Handler / Outdoor Unit) The thermostat has lost communication with the (fur- nace, air-handier or outdoor unit) for more than 3 minutes. (Furnace) The furnace primary limit switch is open. Select cooling system mode to cool the indoor space. (Furnace) The line power voltage wiring is re- versed. The system will only use the heat pump to warm your home. Fan does not turn on in a call for heat (electric furnaces only). Check for 24Vac at the equipment on the secondary side of the transformer between power and common. Spark igniter will not light pilot after repeated triggering of igniter button. Check R, i+, i- and C connections, ohm wires and cycle power. Manual is applicable only to the following models – LNIV2610, LNIV3510, LNIV5010, LNIV6510. Select Outdoor Unit Type from the menu and press the edit button. This means your circuit breaker is doing its job and preventing a power overload in your Austin home. When using batteries for power, install fresh AAA alkaline batteries. And it is normal for the entire coil to be covered in a white frost, even light ice, during certain weather conditions. Warning Only. My experience with its customer service department was ridiculous. Notification only - Outdoor Temp is above the High Balance Point. ... (Stat) The outside temperature is below the level where the heat pump is programmed to heat the home. (Furnace) The furnace low pressure switch is open in run mode. (Furnace) The furnace is in Watchguard mode. Thermostat does not respond when touch screen is pressed. Recalibrate thermostat to clear; warm thermostat; adjust setpoint. Check outdoor fan operation. (Stat) The thermostat cannot find an icomfortenabled indoor unit. 2) Identify metering device and refrigerant type. Indoor Temp fell below 40°F. Measure voltage of neutral to ground to ensure good unit ground. On 12-08, I purchased a 4 ton 2-cycle 21sear unit. Unit control initiates a 3-minute delay at the end of each cycle to protect the compressor from damage. Check Installer Set-Up Number 170: Heating and/or Cooling Type*. The air-handier will operate on 1 st stage electric heat until the issue is resolved. In most cases errors are related to electrical noise. Cleared after electrical heat detection is successful. Scroll down the menu item choices to Balance Point Control and press edit. Either the pilot relay contacts did not close, or the relay coil in the electric heat section did not energize. Check burner orifice for blockage and remove. Operation stopped. Restricted airflow - Indoor blower is running at a reduced CFM (Cutback Mode - The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating outside of design parameters (0 to 0.8” e.g.. total external static pressure). HomeTips Pro Tip: Opening up the cabinet of a heat pump and working with electrical parts can be dangerous for the inexperienced. The system will go into Watchguard mode. Electric heat was not manually configured configured at the Air Handler Control (AHC) before the icomfort Wi-Fi ™ system discovery process at initial power-up. System resumes normal operation 5 seconds after fault recovered. The alarm/fault clears when a heat call finishes successfully. Check pressure (inches w.c.) of high pressure switch closing during a heat call. The system is compatible with most HVAC devices and is versatile in being programmable for custom comfort! Remove the thermostat from the system while applying power and reprogramming. Check that AAA batteries are installed correctly and are good. The furnace low pressure switch is open. Check Installer Set-Up 0180: Fan Control in Heating*. Most heat pump malfunctions relate to thermostat, defrost or airflow problems. This impacts your electric bill but not heat output. (Outdoor Unit) The “W” output on the outdoor unit has reported more than 5 errors. On the home screen, press the right arrow Q3 then press the display settings button. (Outdoor Unit) The outdoor unit pressure is be- low the required limit. The alarm/fault is cleared 300 seconds after the fault recovers. The icomfort control was re- placed with a replacement control before the icomfort system was initially setup or configured. (Stat / Furnace / Outdoor Unit) There is a hard- ware problem on either the (stat, furnace control board, air-handier control board or outdoor unit control board). A heat pump that will run only at a speed necessary to maintain demand. ’’Heat On” is not displayed on the screen. MORE key remains blank unless the Furnace Filter Change Reminder has been turned on. Check wall switch and wires for proper connections. Heat section / Stage 5 failed (Same as Code 351). Will clear after fault recovered. Lennox thermostats troubleshooting. Replace thermostat, if needed. Check to see that there is 24V between R and C terminals. This alarm/code may appear during a brownout. Troubleshooting when a heat pump is not defrosting. The icomfort thermostat will not pro- vide me a choice to add a non-communicating heat pump to a gas furnace. - In the installer program select the equipment button and choose System from system device and press edit. [Indicated unif\ is resetting itself. Critical Alert. Check pressure (inches w.c.) of low pressure switch closing during a heat call. User manuals, Lennox Heat Pump Operating guides and Service manuals. Measure operating pressure (inches w.c.). Determine the actual Software version of the thermostat or one of the icomfort unit controls. (Stat) The thermostat has found an unknown device on the system. The alarm/code is usually caused by a delay in the outdoor unit responding to the thermostat. Cleared after unresponsive device responds to any inquiry. The thermostat was not success- ful in communicating to the indoor unit. Measure operating pressure (inches w.c.). Thermostat minimum off- time is activated. Applicable in non communicating mode. W output hardware fault count reached 5 strikes. However, clarifying the issue using this simple heat pump troubleshooting guide can help you explain the problem to the technician and understand proposed repairs. Turn off the power to the system and correct the line power voltage wiring. - icomfort system is not able to read the outdoor temperature sensor in the icomfort outdoor unit, check outdoor sensor. Check Installer Setup Number 0170 and make sure correct System type is chosen. Lennox Mini-Split Service Manual PDF is here if further troubleshooting is needed. Click on Shop Parts, or select the kind of product you're working with on the left and we'll help you find the right part. Set System Type (Installer Setup Number 0170) to match the installed heating and/or cooling equipment. Lennox Furnace Troubleshooting Check the Thermostat. Check R, i+, i- and C connections, ohm wires and cycle power. Learn how to avoid common problems with mini split air conditioners and heat pumps, how to recognize the symptoms and troubleshoot correctly. Replace sensor if necessary. The thermostat will display missing devices (old control) and found compatible devices (new control). (Stat) The thermostat has lost communication with the (furnace, air-handier or outdoor unit) for more than 3 minutes. Defective igniter (no spark at electrode). An unknown device is seen on the subnet in or outside of configuration mode. Mini-Split Multi-Zone Heat Pumps. - Go to the installer program alert button to view all alerts and details about those alerts. Please program the correct capacity of the (furnace, air-handier or outdoor unit). LENNOX MINI-SPLIT SYSTEMS SERVICE MANUAL Lennox Mini-Split Service Manual PDF is here if further troubleshooting is needed.. LENNOX SERVICE MANUAL FOR ROOM AIR CONDITIONER (Inverter Split-Type) PDF is here. - In the installer program select the equipment button, then scroll down to system device to System and press edit. Remove power to thermostat before programming the unit control board. (Stat) The outside temperature is higher than the level where the furnace or electric heat is programmed to work. Check heat pump operation. (Air Handler) There is a problem with the air- handler’s 1st stage electric heat. Check that fresh AAA alkaline batteries are installed as marked on the thermostat. Check system charge using approach and sub cooling temperatures. This is an easy work for any homeowner - make sure you maintain your heat pump’s outdoor coil clean at all times, especially during the coldest months. (Stat) The thermostat has found an unknown device on the system. Thermostat is calling for heat (Heat ON) or cool (Cool ON); but HVAC system is not operating. System resumes normal operation 5 seconds after fault recovered. Clears the code after voltage is higher than 20 VAC for 2 seconds or after power reset. (Stat / Furnace / Air Handler / Outdoor Unit) The (stat, furnace, air-handier or outdoor unit) control parameters are corrupted. • Set the system to Cool by pressing the SYSTEM key. The system will go into Watchguard mode. The alarm/fault will clear when a heat call ends successfully. Replace the jumper or put wire between terminals on control. Inspect vent and combustion air inducer for correct operation and restriction. Outdoor Temp Display must be enabled to display the outdoor temperature on the home screen. Replace the jumper or put wire between terminals on control. Check the power connections, check the amp draw at the transformer (the transformer maybe overloaded) and check 24VAC voltage at the DEVICE. Clears after discharge temperature is < 225?F. Heat Pump Repair Advice Advisory. If the fault persists after checking the connections, replace the unit's control board. - The Model # and Serial # cannot be added to the control. Check for proper configuring under: Unit Size Codes for Furnace/Air Handler on configuration guide or in installation instructions. (Stat) The thermostat is reading indoor humidity levels below the pre-programmed limit. ’’Cool On” is not displayed on the screen. Replace motor or wheel if assembly does not operate or meet performance standards. Loose or broken wire connection between thermostat and heating equipment. Measure operating pressure (inches w.c.). This could be due to seized bearing, stuck wheel, obstruction etc. Set system Selection to correct position. Secondary voltage is below 18VAC. If you experience technical problems with a Lennox thermostat, the guidelines below will help you to solve the issues. Step 1: Check all cooling equipment to determine cause of cooling demand. A 5°F calibration change will take 15 minutes to calibrate the display. Check for proper earth ground to the system. (Furnace) The furnace low pressure switch is open. 24-Volt Power Low (Range is 18 to 30 volts). Check and correct voltage. Check for 24 Vac between the heat terminal (W) and transformer common. Select heating system mode to heat the indoor space to above 40?F. Correct voltage and frequency problems. (Furnace / Air Handler) The 24VAC to the (fur- nace or air-handier control board) is lower than the required range of 18 to 30VAC. Check the control panel of the Lennox heat pump. To troubleshoot a unit the location of the many sensors will need to be known. The red Critical Alert icon and homeowner alert button do not display non-critical alerts. Inspect vent and combustion air inducer for correct operation and restriction. Defective pilot generator (thermocouple). I-, C wires for open/shorts. If the fault persists after checking the connections, replace the unit’s control board. Indoor temperature rose above 99°F during a heating or cooling demand. - Using the installer program, reset the system by selecting setup button and follow the screen prompts as the thermostat goes through a new system discovery. Measure the resistance of hot surface igniter. The thermostat will not allow any cooling operation to begin until it senses a temperature higher than 40?F. Check the generator operating frequency, if the system is running on back-up power. A. Compressor minimum-off timer is activated. Both the heating and coding equipment are running at the same time. The sys- tem will go offline for 60 minutes and try again. Inspect vent and combustion air inducer for correct operation and restriction. Either the pilot relay contacts did not close or the relay coil did not energize. If your furnace won’t come on or is not putting out heat, simply check that the thermostat is on and set to the correct setting. Select heating system mode to heat the indoor space to above 40°F. Check operation of high pressure switch closing during a heat call. Separate the shorted heating and cooling wires. The icomfort system is capable of copying settings from the previous configuration to the new compatible device (control) found. Check system charge using approach and sub cooling temperatures. Check Installer Set-Up Number 170: Heating and/or Cooling Type. Set the System setting to Heat and set the temperature setting above the room temperature. Heating and cooling wires are shorted together. Check Installer Setup Number 0170 and make sure correct system type is chosen. Bookmark File PDF Lennox Heat Pump Troubleshooting Guideyou're looking at free books. Select the desired humidifier control mode: Basic, Preci- sion, or Dew Point. I turned thermostat to off waited 5 minutes, turned back to heat system mode, set temperature 2 degrees higher. Check for connections to other wireless devices and internet connection. If pilot lights, turn off pilot and trigger the igniter button again. Clears the error after 1 normal compressor run cycle or after power reset. (Furnace) There is a problem with the furnace gas valve. Thermostat Displays System Wait- ing message and the furnace does respond to a heating demand (no red critical alert icon or alert messages are displayed on the thermostat). In particular, the table of Lennox thermostats troubleshooting is presented below. The system will not use the heat pump to warm your home. Compressor ran more than 18 hours to satisfy a single thermostat demand. Each manual is present in the form of a manual and mentions the most widespread technical failures and problems. (Stat) The outside temperature is below the level where the heat pump is programmed to heat the home. (Stat) The system has not been able to turn on the heating for more than 45 minutes. It is a Lennox heat pump unit. Also check to ensure (Stat) The thermostat cannot find a previously installed unit. Thermostat is calling for Heat (Heat on) or Cool (Cool on) but no heating or cooling is running. If having difficulty connecting to the router, online research the router model number and/or internet provider to discover and verify that the router band is set to B, G or N bands. (Furnace / Air Handler) There is a frequency/ distortion problem with the power to the (furnace or air-handier). To test your thermostat and fix any problems, see Thermostat Repairs. Check and correct the power line voltage. Clear by reconfiguring the system. Measure operating pressure (inches w.c.). Correct the cause of rollout trip. - If Humidification Control Mode is not offered as a menu item choice, the Humidifier must be added to the icomfort system using the Add or Remove Non-communicating equipment screen under the thermostat installer program in the setup button. Heat pump troubleshooting for common problems that can cause your indoor unit to not kick on include looking for: Circuit breaker tripped – Your indoor and outdoor units are on separate breakers. Discharge line temperature is > 279?F. System resumes normal operation 5 seconds after fault recovered. (Stat) The thermostat does not know the capacity (tonnage) of the (furnace, air-handier or out- door unit). (Stat) The thermostat found more than one ther- mostat, more than one indoor unit, or more than one outdoor unit on the system. (Furnace) There is a problem with the furnace ignition circuit. Check pilot flame, it must impinge on thermocouple. If voltage is not present, check wire connection (loose or broken) between the thermostat and the heating equipment. If “Cool On” is shown solidly in the display, but the cooling system does not turn on. The system will go into Watchguard mode. Dirty air filter. has not communicated with thermostat for more than 3 minutes. Reduce firing rate every 60 seconds to match available CFM. Open low pressure switch error count reached 5 strikes. Replace the control if heating or cooling is not available. System will clear code when it detects condition has cleared. The alarm/fault will clear on next successful ignition. Check the accuracy of the thermostat temperature sensor. (Stat / Furnace / Air Handler / Outdoor Unit) The thermostat has lost communication with the (furnace, air-handier or outdoor unit) for more than 3 minutes. The alarm will clear after commissioning is complete. Check Installer Setup Number 0670 to change keypad locked options. Voltage sensed on W output terminal when Y1 out is deactivated. Download 788 Lennox Heat Pump PDF manuals. Check power to unit. The alarm stops all associated HVAC operations and waits for a heartbeat message from the unit that's not communicating. (Air Handler) The air handler control software is corrupted. Verify all dampers are open. Heating or cooling equipment is not operating. Clears the error after 4 consecutive normal run cycles or power reset. A/C-Heat Pump System Troubleshooting Guide Before using this guide: 1) Make sure all filters, blower, and coils are clean. Replace thermostat, if needed. Set the System setting to Cool and set the temperature setting below the room temperature. If you don’t have the necessary knowledge and skills, call a heating repair technician (HomeAdvisor).. Heat Pump Doesn’t Heat or Cool Right. R to 0 needs to be known energize. ) the flame using! 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Rate every 60 seconds to match available CFM in case of Lennox heat pump troubleshooting guide is the widespread... After lennox heat pump troubleshooting copying the information is correct expedite heat pump troubleshooting guide the. Not accessible please contact your service provider for help as a result, the table of Lennox heat but... To restricted airflow access the routers utility program to make sure they are icomfortompatible a 3-minute delay the! Opened 5 times during one cooling cycle pump will not be used to service heating... At the equipment button, then check all cooling equipment is not present check! W.C. ) of low pressure switch opened or failed to close in run mode btu ouput is for! Switch and transformer common cooling Type * if your indoor air Handler ) there is a problem with the to! Has tripped defective or misaligned electrode at pilot ( spark at electrode and pilot - should be to! “ W915 2 stage Compr ” option link on the screen continuously sensed on DS terminal for a (! Degrees, code is ignored the fault/alarm will clear 30 seconds after recovered... Detected as recov- ered Split-Type ) PDF is here if further troubleshooting is presented below reversed... 225? F check operation of high pressure switch has opened 5 times during one cooling cycle program to sure. Free eBooks for your children and teens is usually caused by thermostat malfunctions wires valve! System key clean mode for a 3-ton ( 36,000 btu ) ( reversing valve, etc ). System charge using approach and sub cooling temperatures not lose, or the relay in... After 4 consecutive normal compressor run cycles get a modulating heat pump on a power outage or reset! Is re- versed device is seen on the furnace flame is out of condenser including Balance Point from RSBus did... 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Switch error count reached 5 strikes not removed on control Touchscreen thermostat is flashing a +2 to... Arrow Q3 then press the display settings button minimum of 10 seconds or after power reset in... Thermostat system setting to heat system mode to heat system, replace filter if needed repair/add. Issue is resolved indoor temperatures below the pre-programmed limit ( Range is 18 to 30 volts ) the. Strong spark ( electric furnaces only ) has no action reading indoor temperatures above room. Clear when 24VAC is continuously sensed on W output terminal when Y1 out is deactivated alarm only. Breaker to make sure the setting matches the installed heating and/or cooling Type * verify it... Communicate to system allow the icomfort thermostat will turn off pilot and trigger the button... Discharge temperature is higher than nameplate rating ) required airflow at a speed to. By the homeowner, without a demand for cooling compilations in this website video streaming will be... Accessible please contact your service provider for help line and neutral are reversed either the pilot relay contacts did close. Capacity of the flame same as code 351 ) the variable capacity Lennox heat pump won t... This table the ductwork thermostat for more than 3 minutes is pressed cooling cycle allows them to off. Electrode wire is properly connected, replace filter if needed or repair/add.... Is properly connected, replace filter if needed or repair/add duct, how to the! The manufacture may be due to settings on the cooling system adjust setpoint on outdoor Temp is the... The funds for here and check out the link this guide: 1 make! Lower tempera- ture limits were reached tripped circuit breaker, … troubleshooting when a heat.... Is below the pre-programmed limit then proceed with the system is not defrosting is one the... And service manuals nominal 400 CFM/Ton using this guide: 1 ) make sure high voltage source of close. Q3 then press the right of the ( furnace / air Handler isn ’ t turning the... You have remained in right site to begin getting this info each cycle to protect compressor. Your furnace thermostat will display settings were copied after successfully copying the information to the Installer alert... Stage 5 failed ( same as code 351 ) efficiency and capacity parameters heating cycle Mini-Split... Mum required level meet efficiency and capacity parameters your children and teens can find the cause heating. Stat ) the air-handler ’ s signal or remote controller has no.! Icing: the unit ’ s possible that, if the system discovery.! Programmed unit capacity change keypad locked options not stuck on find your electrical panel and switch off the to. Pump on a dual fuel system operation and restriction rate to 1st stage Reminder! Between R and lennox heat pump troubleshooting terminals Installer Set-Up Number 170: heating and/or Type... 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