the circuit opened three times within a 1-hour window. The default setting for the ResetLO is On. The Unit Controller compares the supply air temperature to the “SUPPLY AIR TEMP ALARM FOR COOLING” and initiates the alarm based on the following criteria: Supply Air Temperature Heating Alarm (39). Since tandem compressors are used there is a single low pressure switch for system 1 and one for system 2. The input has two thresholds. The acceptable range is 0.0 to 20,000 ohms. Search the history of over 446 billion web pages on the Internet. when this occurs, the unit controller switches the economizer type to dry bulb. heat stage and voltage is not present after 5 continuous minutes it will generate an alarm. Supply Air Temperature Cooling Alarm (38). Scranton Motors Inc. features a vast inventory of the new Buick and GMC model. If you still believe your HVAC system is not working properly, please call your YORK® Contractor with your system or unit model number for service. Are the air registers (supply or return ducts) plugged? This indicates the real time clock cannot be read as a result of a hardware failure. when this occurs, the unit controller switches the economizer type to single enthalpy. the circuit opened three times within a 1-hour window. (F): N/A. If the Unit Controller is not calling for the operation of the heat stage and voltage is present at the gas valve for 5 continuous minutes it will generate an alarm and lock on the supply fan. The type of protection varies depending on the type of compressor used. The display will show a value of  40.0° F. This alarm indicates the return air temperature input is either open or shorted. This is not an alarm but rather an indication the unit has been placed in a smoke purge mode. Mfr #: HS1; Includes: UC1 Interlock Control, Fan Proving Switch, Adjustable Damper, Vibration Isolators Item: Induced Draft Blower CFM @ 0.700-In. GMC Certified Pre-Owned Details: * Roadside Assistance * Powertrain Limited Warranty: 72 Month/100,000 Mile (whichever comes first) from original in-service date * Warranty Deductible: $0 * Transferable Warranty * 172 Point Inspection * Limited … This alarm will be generated based on the following criteria: This alarm is initiated on a VAV unit if after 35 seconds of supply fan operation the duct static pressure is not equal to or greater then 0.05” WC. All units have two compressors with independent refrigeration circuits to provide 2 stages of cooling. If no voltage is present replace the sensor. The alarm indicates the dirty fi lter switch contacts have closed indicating the pressure drop across the fi lters is above the setting of the switch. Door locks, power programmable with lockout protection; Driver Information Center monitors 26 various systems including, Vehicle Information Menu (oil life, tire pressure, standard/metric units) and Trip Information Menu (trip 1, trip 2, fuel range, average fuel economy, instant fuel economy, average vehicle speed) and compass display the circuit opened three times within a 1-hour window. Red 2021 Chevrolet Blazer RS 3.6L V6 SIDI DOHC VVT AWD Sunroof / Moonroof, Leather, All Wheel Drive, Rear Back up Camera, Heavy-Duty Cooling System, Hitch Guidance, Hitch Guidance w/Hitch View, Navigation System, Trailering Equipment. the display will indicate –40.0. On the unit we checked all components, compressor, turbine, fans, switches, freon in the system, everything is in good condition. The problem is that the device works a couple of days in the heating mode without any problems and then fires the fault 13. This alarm indicates the space temperature input is either open or shorted. this has no effect on the operation of the unit. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. This website uses cookies to improve your experience while you navigate through the website. the low pressure switch opens both of the compressors for that system will be turned off. Outdoor air temperature sensor has failed open or shorted. Second stage of heating is locked out because the ignition control board failed to turn on the gas valve after 5 minutes of operation or the gas valve has voltage on it and the control is not calling for the stage of heating. Most units will light 3 times, then go into hard lockout. 351579-YTS-C-0111 Johnson Controls Unitary Products 3 THE MILLENNIUM® ®SIMPLICITY® CONTROL INTRODUCTION AND OVERVIEW Welcome to the new Millennium® Simplicity® control, a digital control system designed spec ifically for the Millennium ® 25 to 40 Ton single package rooftop unit. FC 13 – Low voltage indication or lockout. The input to the control originates at terminal FSI, wire 388. The fan should run when power is being supplied to the furnace. This alarm indicates the Unit Controller Real Time Clock is not functioning. This is caused by a variety of reasons including rust and pitting on the contacts. 2020 GMC Sierra 1500 SLT Summit White 10-Speed Automatic, 4WD, jet black Leather. serial number, and reset lockout (ResetLO). This alarm indicates the resistance between terminals CV/VAV and CV/VAV at the P7 connection is out of range. the unit controller changes the ventilation mode to fixed minimum. At the thermostat, turn the fan to ON. This alarm indicates the outdoor humidity sensor is out of range. The new vehicle model is now available at Brustolon Buick GMC. Door locks, power programmable with lockout protection; Driver Information Center monitors 26 various systems including, Vehicle Information Menu (oil life, tire pressure, standard/metric units) and Trip Information Menu (trip 1, trip 2, fuel range, average fuel economy, instant fuel economy, average vehicle speed) and compass display Test drive this New Red Hot 2021 Chevrolet Blazer & experience the Riverview Chevrolet Buick GMC difference today. This indicates the duct static has not risen quickly enough in a vav unit when the supply fan is energized. © 2020 Johnson Controls. The 24 VAC source originates at the terminal FSP, wire 389. To trouble shoot the sensor verify 24 VAC between terminals EXC and COM of the sensor. All Rights Reserved. This alarm indicates there was a call for supply fan operation and after 90 seconds of supply fan operation the switch did not close. First stage heating is locked out on limit switch trips. If your home comfort system isn't operating the way it used to, there are a few things you can check before calling for service. the circuit opened three times within a 1-hour window. A microelectronics failure has occurred and the control is down due to a fatal fault. This resets all active hard lockout alarms. The “SPACE TEMP TRENDING ALARM TEMP” and the “SPACE TEMPERATURE ALARM TIME” must be set. This alarm is generated when the resistance in the Space Temperature Offset circuit is greater then 20,000 ohms. Not all units have external overloads. This alarm indicates a problem with the Unit Controller microelectronics has occurred and the Unit Controller is operating on default values. York 10 ton Rooftop 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, also made sure it had a good connection at the board. When this occurs the Unit Controller will switch economizer operation to Single Enthalpy. The unit has been in a given mode of operation for 10 minutes. Required fields are marked *. Is the outdoor disconnect switch on your outdoor unit in the ON position? 460V, 3ph. Model DM090N15N2DAA2A Serial NKLM096199 Customer calls and no AC, go up on the roof and the board flashes 9 times indicating ignition control is locked out and ignition control failure, What?? But opting out of some of these cookies may affect your browsing experience. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Try recycling power to the control. Indicates 24vac is not detected on the Fan Over terminal. Compressor system 2 (compressors 2a, 2b) locked out on low pressure control. The supply fan binary output has been turned off for 90 seconds and the air proving switch circuit has not opened. These cookies will be stored in your browser only with your consent. The all-new Chevrolet & Buick vehicle is now available at Wind Gap Chevrolet Buick. One of my Kmart's got 6 new RTU's last spring and we are still having issues. Compressor system 2a locked out on compressor motor protection module. The alarm indicates the hydronic freeze stat switch has opened. the circuit opened three times within a 1-hour window. This indicates the outdoor air humidity sensor is out of range. Compressor system 1a locked out on compressor motor protection module. Is the temperature setting on the thermostat set higher than the thermostat's indoor temperature? A microelectronics failure has occurred and the control is operating on defaults. The ignition cycle can run three times without the switch activating. First stage of heating is locked out because the ignition control board failed to turn on the gas valve after 5 minutes of operation or the gas valve has voltage on it and the control is not calling for the stage of heating. The supply fan performs a Fan Delay Off when the limit re-closes. Likewise if the low pressure switch opens for system 2, (compressors 2A, 2B), opens it will generate both an 11 and 12 alarm code. These cookies do not store any personal information. The outdoor air is not 20.0° F or more warmer then the “SUPPLY AIR TEMP ALARM FOR COOLING” set point. DRIVER CONFIDENCE II PACKAGE includes (K4C) Wireless Charging, (UV2) HD Surround Vision, (DRZ) Rear Camera Mirror, (KSG) Adaptive Cruise Control, (UGN) Enhanced Automatic Emergency Braking, (HS1) Safety Alert Seat and (T4L) LED headlamps ; Defogger, rear-window electric; Door locks, power programmable with lockout protection EMISSIONS, CONNECTICUT, DELAWARE, MAINE, MARYLAND, MASSACHUSETTS, NEW JERSEY, NEW YORK, OREGON, PENNSYLVANIA, RHODE ISLAND, VERMONT AND WASHINGTON STATE REQUIREMENTS ; ENGINE, 3.6L V6, SIDI, DOHC WITH VARIABLE VALVE TIMING (VVT) and Active Fuel Management with Stop/Start (308 hp [229 kW] @ 6600 rpm, 270 lb-ft of torque [366 N-m] @ … This indicates the supply air temperature has exceeded the programmed supply air temp alarm setpoint for heating. The display will show a value of –40.0° F. This alarm will have no effect on the operation of the unit. lockout the compressors when the outdoor air tem-perature is low or when free cooling is available. Second stage heating is locked out on limit switch trips. the circuit opened three times within a 1-hour window. The Unit Controller compares the supply air temperature to the “SUPPLY AIR TEMP ALARM FOR HEATING” and initiates the alarm based on the following criteria: Prior to declaring this fault the Unit Controller checks the outside air temperature and the economizer position. The IAQ sensor input is at terminal DV+ and DV-. The Space Temperature Offset input is at terminals SSD and GND of the P6 connector. Supply Fan Air Proving Switch Closed Alarm (25). This indicates the return air humidity sensor is out of range. Verify the presence of 24 VAC between PURGE connection at the P3 connector and “C” on the P1 connector. The display will show a value of –40.0° F. The space temperature input is at ST and GND of the P6 connector. the display will indicate –40.0. This alarm indicates a problem with the Unit Controller microelectronics has occurred and the Unit Controller is shut down. If you still believe your HVAC system is not working properly, please call your YORK® Contractor with your system or unit model number for service. Lockout Process Furnaces would not run well if they locked every time a burner failed to ignite. When a furnace is serviced (for complete service of a gas furnace) see here one of the things done on a newer furnace (within the last 25 years) when servicing, is to clean the flame rod as on the left. If after the three retries the Unit Controller will lockout heating and cooling operation. • Anti-Short Cycle Protection - To aid compressor life, an anti-short cycle delay is incorporated into the stan-dard controls. Check the resistance between the two CV/VAV terminals and take appropriate action. Third stage of heating is locked out because the ignition control board failed to turn on the gas valve after 5 minutes of operation or the gas valve has voltage on it and the control is not calling for the stage of heating. 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