4 High pressure switch is open and requires manual reset. 3 If high pressure switch is present, see Flash Code 2 information, 4 If low pressure switch is present, see Flash Code 2 information. The board detects open sensor or out of temperature sensor range. Electric Heat only 3. The compressor will remain off until the discharge temperature has dropped below 225°F (107°C). Electric Heat only 3. Ensure you have a power switch connected to the heat pump, and be certain that it’s receiving power. Your browser is out of date. This unit must be installed with an approved indoor air handler or coil. To get the full experience of this website, 1. 5 Open circuit in compressor supply wiring or connections. The bearings that are used wear out over time. None required (Jumper TEST pins to override). If the discharge line temperature exceeds a temperature of 285°F (140°C) during compressor operation, the board will de-energize the compressor contactor output (and the de- frost output if active). The heating and cooling system is also dual-fuel capable so you can couple it with the Lennox furnace to switch between electricity and gas. If the thermostat is in off mode, heat mode is en-abled when the HEAT button is pressed. FM21) or a control system with dual-fuel capabilities (i.e. 2 Unit circuit breaker or fuse(s) is open. Designed for applications with remotely located indoor air handler units or gas furnaces with indoor add-on coils. 2 Verify voltage at contactor coil falls below 0.5VAC when off. Heat Pump + Electric Heat 2. Figure 3. Lennox blower motors prelubricated applicable). This is indicated Improper metering device installed or incorrect operation of metering device. The unit boasts efficiencies of up to 16 SEER and 9 HSPF and has noise levels as low as 71 dB thanks to the scroll compressor and a direct-drive fan. 6 Unusually long compressor protector reset time duo to extreme ambient temperature. Cycle 24 volt power to board. When heat pumps are used with gas furnaces, a dual-fuel control (i.e. Are the TIMER ON and TIMER OFF features being used incorrectly? That is, the heat pump will run when the entering water temperature (EWT) is less than the desired set point (normally with a -0.5 °C split) and stop running when the EWT is a set point. During operation in high-humidity areas, condensate will form on cold outdoor refrigerant pipes. Go ahead, push your air conditioner outside unit reset button once and if it seems to carry on in good order, then fine. + Check valve’s opening & supply pressure, Fault on the superheat thermostat on the gas burner support bar, + Check superheat thermostat’s operation after manual reset, After 10 seconds safety shutdown by the ignition control block, + Check connections of the control block on the gas valve, + Repositioning of the control block on the valve + Replace valve, + Check the free movement of the fan wheel + Check Electrical connection on the Gas Ignition Control Block and on EF connection Board, + Replace fan + Replace EF connection board If necessary. Common Lennox Air Conditioner Issues The unit is loud. Within 4 seconds the gas Burner fires-up BUT safety shutdown from the Ignition Control Block. Your heat pump has a “reset” button – press that button and it will “reboot” the motor. If it has, turn it to OFF or to Auto. This single-stage heat pump delivers quiet and efficient year-round comfort. 2 Condenser coil poor air circulation (dirty, blocked, damaged). It must not be Earthed (230V). When this hap- pens, the unit will enter a defrost cycle. Same model Lennox elite c33-36c-2f-2 gas heat pump. 2011 Lennox Industries Inc. Dallas, Texas, USA RETAIN THESE INSTRUCTIONS ... on the heat pump control prior to starting system. This will eliminate the risk of any electrical injuries. This code detects shorted sensor or high discharge temperatures. We are looking for the reset button it is a Klixon CGJ36CD. If it is set to OFF or Auto already, the heat pump’s limit switch needs to be adjusted. Remove any blockages or restrictions from coils and/or fans. Fan motor - This is common on older units. It has a red push rubber switch that you push in. + Change the Control Box if the Gas valve is OK. Diag 1. Press The Button – Once you find the button, press it continuously for 3 seconds and release it. Check condensate line outside to make sure it is not obstructed. Depending on what the problem may be, the lights can flicker or display a continuous light. Once you find the control panel, lift the panel up and away from the appliance — you can set this aside for now. The plastic components of the indoor units sometimes expand and con- tract when they are heated and cooled. 4 Broken wire or connector is not making contact. Clean or change filters. If you want to learn more about our services in Richardson, Garland, Plano, or anywhere in the Dallas metro area, please give us a call at (972) 201-3253! Lennox 72F83 Stacked Thermal Time Delay Relay, DPST N.O., ON 1-110 Sec, OFF 1-110 Sec, 24 Volts, 72F8301 2 Low line voltage (contact utility if voltage at disconnect is low). Ceiling / Floor Mini Splits. After a few seconds the gas burner fires-up. This is not a malfunction. Heat pump units - In HEAT mode, a timed delay keeps indoor fan off for two minutes to prevent unheated air from being circulated by the indoor fan. Initial power up, safety trip, end of room thermostat demand. Unit operating normally or in standby mode. Keypad located within the unit Keypad located within the unit * This equipment is an electronic device that controls packaged water cooling systems via air and reversible air/water heat pumps. The HEAT button is located behind the small door on the right−hand side of the thermostat. Help. Incorrect or improper sensor location or connection to system. Press and release the limit control switch to rest your Lennox furnace. Medium Static Ducted Mini-Splits. 3 Verify 24VAC is present across Y and C when thermostat demand signal is present: if not present. Look at the control panel on your furnace. System is not cooling (or heating) efficiently. The control panel could be located on the bottom panel on downflow furnaces or the top panel on upflow models. Sometimes, the sound of the outdoor unit fan or compressor relay can be transmitted in a way that makes it seem to be coming from the indoor unit. Hello, The pressure switch is the only reset switch on this unit. Fan A duel fuel system (Heat Pump with an indoor furnace unit) will have the following Parameters 1. Ceiling Cassette Mini-Splits. If none of these fixes work, you may have to call in professional help. Make sure all pressure switches and sensors have secure connections to system to prevent refrigerant leaks or errors in pressure and temperature measurements. We have manuals, guides and of course parts for common 12HPB30-12 problems. Restricted air flow over indoor or outdoor coil. 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