Normally it will be used in critical utility applications where equipment safety is on top priority. Furnace Lockout Mode Reset Help The last thing anyone wants to deal with, when it is bitterly cold outside, is a furnace that stops working. 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Model #DM120N20N2AAAA1A #1 compressor comes on and locks out after a few seconds, board flashes code 7 which is FS1 (freeze protection lockout) according to the code list ohm'd the freeze sensor on the suction line and it checks out ok, … However at 20 degs the HP is still producing about 6 degs of heat to the return air, but runs all the time and in Nashville TN area, it's not often colder and I'm going for comfort as I … This code is not considered an alarm, but flash code to alert the technician the control is waiting for a compressor anti-short cycling delay to expire. The compressor lockout feature is to protect the compressor from kicking off and on very fast due to power outages or due to the operator turning it off and on real fast at the thermostat. 1st stage compressor has two unloaders. The type of protection varies depending on the type of compressor used. I know that the air temperature coming out of the unit prior to lockout is about 90 F. Could you please tell me the other temps you need and I will post them (I'm a home owner not a techie ! You did not even list the brand of the stat, but you are probably talking about an Emerson branded White -Rogers model 1F85CA-0471 thermostat. This can be by-passed for one cycle by pushing the test reset button on the board. You must log in or register to reply here. Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. - Answered by a verified HVAC Technician. Heat pump compressor lockout temperature? It will … Not a york rep but I would check the location of the freeze stat. High balance point is the temp at which you don't need the aux heaters to help the heat pup maintain set temp. Recently had main board replaced and loops bled of air. I have an Oregon Scientific WMR100 "weather station" that I … 35: This indicates the 24-volt supply circuit has dropped below the allowable level. thermostat closes), the load energizes. JavaScript is disabled. You did not even list the brand of the stat, but you are probably talking about an Emerson branded White -Rogers model 1F85CA-0471 thermostat. Removal of power begins the “lockout” and the time delay begins (i.e. The thermostat is the Lennox ComfortSense 7000. The purpose of the lockout relay is to keep the compressor off when there is a significant fault EVEN if the fault condition goes back to normal. the control will shut down until the voltage rises above 19.2 vac. 2. thats as long as it will stay running. The board default setting is: Low ambient compressor lock-out temp=40* Low ambient compressor lock-out= Though lockout mode errors and resets do vary from manufacturer to manufacturer, most use a simple reset procedure that involves turning power off to the furnace for thirty seconds or longer and turning it back. A switch inside of a compressor keeps track of the pressure caused by materials in the tank of the device using the compressor. Low setting is suppose to be the temp at which your heat pump uses more electric then the strip heaters. Page 43 66307-YIM-B-0606 low-pressure switch, or freezestat. 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. how do i un lock it? Located in NJ and we just hit a bit of a cold snap. It's a NC switch -- open on fall. As requested here is a brief explanation of the operation of a basic Carrier CLO board. 4.4.1.8 FS1 (Freeze ThermoStat Switch for Compressor One) 4.4.1.8.1. Furnace Lockout Reset Procedure. It will flash this for 5 mins and then it should kick on. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Carrier Unit throwing code: 82 suction overt emp lockout. This indicates the cv/vav input is out of range. The UCB will flash the last five alarms on the LED. ). When the compressor locks out, it flashes a fast flash code on the CXM which is simply defined as lockout in the owner's manuel. Unit 1 year old had 1 year service done no issues. If it is not set to “0”, the setting number displayed is the temperature in degrees Fahrenheit that the compressor lockout is set at. Do ya think it's been rattled for a while? After verifying compressor lockout in step 3, use the button under “Select” to scroll until ISU 356 is displayed, referred to as Outdoor Lockout Backup. Delay On Make option delays the initial load output for up to 5 minutes. As requested here is a brief explanation of the operation of a basic Carrier CLO board. 1. When the compressor locks out, it flashes a fast flash code on the CXM which is simply defined as lockout in the owner's manuel. Hvacproforums is self supporting ...there are NO advertisers here. Check Strip Heat settings a. 3 Flashes HPS1 - Compressor Lock out 5 Flashes LPS1 - Compressor Lock out 7 Flashes FS1 - Compressor Lock out 9 Flashes Ignition Control Locked Out/ Ignition Control Failure / Limit Switch Trip / No Jumper Plug in Heat Section 10 Flashes Compressors Locked Out On Low Outdoor Air Temperature 11 Flashes Compressors Locked Out Because The Verify thermostat and system wires are securely attached. With this extreme cold, however, I've hit a problem. “0” means that the compressor lockout is disabled. In the pictures below, you will see two examples. Removal of power begins the “lockout” and the time delay begins (i.e. the unit will lock out. 2 High Discharge Temperature Td >268F,Reset Td<250, Lockout on 5th 3 Compressor Protector Tripped Detect using current 4 Locked Rotor Lockout on 4th successive locked rotor trip 5 Demand Signal Loss Capacity Req < 0.5VDC, shut down 6 Discharge Thermistor Fault … Those involved in the HVAC industry are urged to register. This button is an immediate On/Off switch. Yes... we are 20 years old. Among the products manufactured by White Rodgers, are digital thermostats for controlling the heating and cooling units in a building. Click to see full … ISU 355 must be set to “_ _" meaning it’s disabled, or set to 5 degrees or less to meet spec : 4. Air Compressor located in Room 544 In Room 544 located disconnect next to Compressor and shutdown the equipment and apply LOTO equipment and apply Lock. The compressor lockout is … Lock out relays are having multiple contacts for various trip circuits as per customer requirement , It is a heavy duty relay. The time delay begins ( i.e furnace manufacturer or local service person for assistance a better experience please! And fan and verify operation trip or lockout on 1st stage lockout ( Propane units only ) 1. lockout to... Try putting 1/10 amp fuses in parrellel with the switches in the HVAC industry are urged register. 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