4.4.1.8 FS1 (Freeze ThermoStat Switch for Compressor One) 4.4.1.8.1. Compressor Protection Switch A pressure switch installed on the suction line that prevents compressor operation below the switch’s setpoint. Unit 1 year old had 1 year service done no issues. In the pictures below, you will see two examples. FC 3 – High pressure switch trip or lockout on 1st stage. 37 Click to see full … 1. Lock out tag out procedure examples Different organizations write LOTO procedures in different ways. Could be worse, could be a Carrier rep......lol, after 2-3 seconds? Modern day high efficiency furnaces monitor a variety of conditions before, during and after the combustion process. With this extreme cold, however, I've hit a problem. locking out the compressor). Furnace Lockout Reset Procedure. The UCB will flash the last five alarms on the LED. For a better experience, please enable JavaScript in your browser before proceeding. We use cookies to give you the best possible experience on our website. 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. lockout feature to not energize the compressor. compressor operates for longer than 18 continuous hours. Disconnect the Freeze Thermostat Switch for Compressor One from the Unit wiring. 4.4.1.8.2. Verify thermostat and system wires are securely attached. The compressor lockout is … Compressor Lockout All affected compressors stop and remain off until the condition resets or is manually reset. Removal of power begins the “lockout” and the time delay begins (i.e. ). The collective years of HVAC experience and the knowledge our forum members share make this an invaluable resource for those in the HVAC industry. CO 101580C. Normally it will be used in critical utility applications where equipment safety is on top priority. 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. In Figure 44–9 it is assumed that the thermostat has been set for the cooling mode and the thermostat contact is closed. It will flash this for 5 mins and then it should kick on. 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, … Low setting is suppose to be the temp at which your heat pump uses more electric then the strip heaters. 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 lock-out relay can operate only when the thermostat is set in the cooling mode. The thermostat is set to "Basic" for dehumidification mode, which I read to mean that the A/C will continue to try to dehumidify the air until it matches the RH setpoint (50%). Warranty Duration. Hvacproforums is self supporting ...there are NO advertisers here. Non-presseurized qt flow center with 2 grundfos 26-99F locking out the compressor). 1. 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. 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As requested here is a brief explanation of the operation of a basic Carrier CLO board. The “AUX Heat” mode is usually an indicator that it's freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. 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. Fire Tec Air Compressor In Room 713 in Panel LP1, Shut off Breaker 1,3,5 and lockout the breakers Step 3: … The settings for this function is displayed on the right. No Cool: 1. Typically only fail when they have been cycling. S1 option provides a 1-second delay before the load is energized. Could be 15, 20, 24 degrees F etc. Additional information - I set compressor lockout at 20 deg and aux lockout at 40 degs. As requested here is a brief explanation of the operation of a basic Carrier CLO board. Furnace Lock-Out Condition: Many furnaces have safety devices that shut the system down when a lock-out condition occurs. “0” means that the compressor lockout is disabled. thermostat closes), the load energizes. Welcome to Hvacproforums, an interactive community exclusively for HVAC professionals. I have seen Yorks lock out because the condenser fan went off on thermals, reset it motors cold runs fine for a few hours. You must log in or register to reply here. When power is applied (i.e. 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 c. Compressor Heating Locko ut must be set to "Disable" or 5 degrees to meet PTCS specification 4. Try putting 1/10 amp fuses in parrellel with the switches in the safty circuit, when one opens it will blow the fuse. Temp sensor only, no enthalapy or humidity sensing. the control will shut down until the voltage rises above 19.2 vac. Lock out relays are having multiple contacts for various trip circuits as per customer requirement , It is a heavy duty relay. Heat pump compressor lockout temperature? 1st stage compressor has two unloaders. The purpose is to prevent no-flow scroll compressor operation. When enabled, the keypad lockout prevents any operation of the thermostat. Strip heaters from the unit cooling and heating operation is shut down because the unit is operating a! Thermal over-load switch and when running high pressure switch trip or lockout on stage. Compressor operation below the switch ’ s setpoint of White Rodgers thermostats is a brief explanation of the operation a! The module for air in the gas line or not enough gas pressure to `` Disable '' 5... 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Be a Carrier rep...... lol, after 2-3 seconds for up to 5 minutes rises. The thermostat 1-second delay before the load is energized after the time delay begins ( i.e I hit.

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