Comfort Sync A3 Installation And Setup Manual
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Comfort Sync A3 Installation And Setup Manual

Ultra smart thermostat
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Comfort Sync A3
Ultra Smart Thermostat
508026-01 12/2019
Copyright 2019
Allied Air Enterprises, Inc.
©
Installation and Setup Guide
West Columbia, SC, USA

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Summary of Contents for Comfort Sync A3

  • Page 1 Comfort Sync A3 Ultra Smart Thermostat 508026-01 12/2019 Copyright 2019 Allied Air Enterprises, Inc. © Installation and Setup Guide West Columbia, SC, USA...
  • Page 2 Technical Support ....................87 Warning Screen ......................15 Index .........................88 General Information ....................... 16 Equipment Found Screen ....................16 Non-Communicating Equipment ................... 16 Reminders ........................16 Comfort Sync Zoning ....................16 Setup Airflow Per Zone ....................17 Commissioning Completion ................... 17...
  • Page 3 HD Display: 7-1/4” x 5” x 1” (184 x 122.5 x 23 mm) » no matter the orientation of the Smart Hub itself. Comfort Sync A3 Smart Hub: 4-1/2 x 4-/2 x 1-1/2” (114 x 114 x 38 mm) - » •...
  • Page 4 mart xtErnal omponEntS USE SMART HUB AS TEMPLATE TO MARK DESIRED MOUNTING LOCATIONS ON WALL OR STUD. CAUTION: DO NOT OVERTIGHTEN LOWER MOUNTING SCREW, MAY DAMAGE SMART HUB. System Status LED KEYHOLE System Commissioning Status LED THROUGH-HOLE Antenna COMMBUS ACC1 ACC2 SECURE SMART-HUB TO WALL WITH...
  • Page 5 lED I mart nDICatorS When alarms are present, you may review alarm(s) listed either on the homeowner notification screen or the menu / settings > advanced settings > dealer control center > notifications screen. Alert codes which require manual clearing can only be done under the dealer control center > notification screen. Table 1.
  • Page 6 IMPORTANT Table 2. Communication Error Troubleshooting (HD Display to Smart Hub) Comfort Sync A3 Smart Use 2-pair, 18AWG unshielded thermostat cable (field-provided) for power Possible Connection Issues Hub - System Status LED terminals (R, C, 12+ AND 12-). Recommend using 2-pair 22AWG shielded...
  • Page 7 6. Use a level to align either the subbase on wall horizontally. NOTE: Once the HD Display is connected, it may take up to 45 seconds for it to power up. 4. To remove the HD Display from the subbase, grasp the left and right edges of the HD Display and gently pull towards yourself.
  • Page 8 IMPORTANT The optional outdoor air (temperature) sensor (OAS) (X2658) wiring distance to the Comfort Sync A3 should not exceed 150 feet (45 meters) when wired with It is recommended to use 2-pair, 18AWG unshielded thermostat cable (field- minimum 22 #AWG (recommend 18 #AWG) dedicated 2-conductor thermostat provided) for power terminals (R, C, 12+ AND 12-).
  • Page 9 (1 - or 2-Stage Indoor Unit Air Conditioner) Smart Hub Display Figure 7. Comfort Sync A3, Allied Air Communicating Indoor Unit with Subbase 24VAC Air Conditioner Figure 5. Comfort Sync A3 with Allied Air Communicating Indoor and Outdoor Units DATS (Optional)
  • Page 10 To indoor unit If unable to connect two wires to indoor unit terminals then pigtail wiring as exampled here. Figure 9. Comfort Sync A3, Allied Air Communicating Indoor and Outdoor Units, Comfort Sync Zoning (Damper Control Module) and Zone Sensors...
  • Page 11 CHARGE AIR SENSOR (refer to UV light installation instruction. (SEE DAS NOTES) Humidity Control Applications: The Comfort Sync A3 thermostat can sense humidity and controls OPTIONAL OUTDOOR AIR SENSOR (SEE OAS both 24VAC “H” and 120VAC “H” outputs to cycle humdifier based on demand. No other NOTES) control or humidistat is required.
  • Page 12 SEE HEPA INTERLOCK KIT FOR INSTALLATION DETAILS MAY NEED TO WRAP WIRE MULIPLE TIMES TO Figure 11. Installing Comfort Sync A3, Communicating Indoor Unit, Float Switch, HEPA Bypass Filter Interlock Kit, Humidifier, Relay and GET AMP DRAW HIGHER (1 AMP) TO MAKE FreezeStat...
  • Page 13 1 2 3 4 ommISSIonIng anD ErvICE SIng tHE obIlE Etup pplICatIon XFMR LINE This application tool is used by dealers to commission a Comfort Sync A3 ultra INDOOR smart thermostat using a Wi-Fi enabled mobile device. L2 L1 BLOWER INTEGRATED POWER CONTROL...
  • Page 14 Mobile Device Operating System Requirements The Comfort Sync dealer mobile app is available for both IOS 6.0 and higher 12. Once the commissioning is completed, exit the Comfort Sync dealer (App Store) and Android 4.1 and higher (Google Play).
  • Page 15 9. Touch the remote-in tab on the Comfort Sync dealer mobile app home Restarting Smart Hub screen. Pressing the Smart Hub button for more than five seconds will reboot the Smart Hub. 10. If the system has not been commissioned it will launch the commissioning screen.
  • Page 16 You may use the preset names or unit may be either an Allied Air Comfort Sync A3 or any standard any custom name you may desire. If zoning is not applicable, proceed to the 24VAC non-communicating thermostat.
  • Page 17 Setup Airflow Per Zone 1. Touch on the circled green arrow to touch a specific zone. The that zone settings will expand to allow the installer to adjust CFMs for each circulation This screen will allow the installer to setup the airflow per zone. The types of airflow type.
  • Page 18 quIpmEnt aramEtErS Selections listed in this section are dependent on system hardware configuration. Not all options listed in this section will be available. NOTE: When changing the default settings for any parameter, there is a possibility that it will affect the settings for another parameter. If this happens, a pop-up message will be displayed listing the other affected parameters and their new automatically set values.
  • Page 19 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Balance Point Control If system is set up as dual fuel or heat pump with electric heat and a outdoor temperature sensor connected to Smart Hub, the low and high balance point settings will appear.
  • Page 20 Staged: Some furnaces can be configured to provide up to four stages of gas heat operation. When staged heating is chosen, the Comfort Sync thermostat allows you to choose between 1, 2, 3 and 4 stages of heat. Single-stage heat: first stage provides 100% of full capacity.
  • Page 21 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Gas Heating When the system is dual-fuel and steady state while operating at full HP demand, this is the amount of °F (°C) below the set point that Activation Temp is allowed before allowing to switch to gas heat.
  • Page 22 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Heating - Heat Pump with Electric - 3 Stage (2 compressor / 1 backup OR 1 compressor / 2 backup) 1st stage Stages Stg1 Differential Locked = 2nd stage stage Stg2 Differential 3rd stage 3rd stage...
  • Page 23 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Heating - Dual Fuel - 3 Stage (1 compressor / 2 backup) 1st stage Stages Stg1 Differential Locked = Disabled 2nd stage Stg2 Differential 3rd stage stage Stg3 Differential 1st stage Stages Stg1 Differential Locked =...
  • Page 24 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Heating - Dual Fuel - 4 Stage (2 compressor / 2 backup) 1st stage Stages Stg1 Differential Locked = 2nd stage Disabled stage Stg2 Differential 3rd stage Stg3 Differential 4th stage stage Stg4 Differential 1st stage...
  • Page 25 Steady state gain controls the demand when the system is not responding to a sensed temperature change away from the Comfort State PI Gain Sync A3 thermostat setting. (Allied Air Variable Options are less aggressive, standard and more aggressive. Default is standard.
  • Page 26 This feature is activated when the structure BTU load is less than the minimum Heat Pump heating capacity of the outdoor unit. The Modulating Gas system will be cycled “ON” and “OFF” at the selected cycles per hour to maintain the settings of the Comfort Sync A3. (This governs Heating Cycles how many cycles per hour the system will try to run when it needs to run at less than minimum capacity.
  • Page 27 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Single Setpoint Mode (SSP) (Non-Zoning System Only) On the user screens this is referred to as Perfect Temp (Temperature). Options are enabled or disabled. Default is disabled. The Single Set Point (SSP) algorithm allows the user the set only one temperature set point value rather than one value for heating and a different value for cooling.
  • Page 28 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) When enabled, smooth set back begins recovery up to two hours before the programmed time so that the programmed temperature is reached at the corresponding programmed event time. Assume 12°F (6.72°C) per hour for first-stage gas/electric heating and 6°F (3.36°C) per hour for first-stage compressor based heating or cooling.
  • Page 29 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) The True Temp feature factors in the outdoor temperature and indoor humidity for a more accurate control of the temperature in the home. Either an outdoor temperature sensor is used or Internet Weather is enabled for this feature to operate. Modifying this setting here will also change the feature status on the user settings screen.
  • Page 30 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) Ventilation Control Mode - ASHRAE • The system first tries to satisfy the ventilation volume by only ventilating while conditioning is occurring. Continuous fan is not considered conditioning. • The total volume of ventilation air is accumulated and stored to compare against the target hourly ventilation volume Vhr. The accumulated value resets each hour.
  • Page 31 NOTE: For Allied Air variable capacity Outdoor Units differentials are ignored. Minimum and maximum CFM will be dependent on system component configurations. These parameter values are automatically adjusted to the specific hardware configuration. See Comfort Sync Zoning system installation instruction for minimum CFMs for specific indoor units.
  • Page 32 Table 5. Smart Hub Parameters Parameter Description (In alphabetical order) At the end of a gas cycle, the Heat Blower Off-Delay may not be long enough to completely cool the heat exchanger. This may result in a primary limit trip then, or at the beginning of the next heat demand. This parameter allows the blower to run after a gas heat call Zoning Gas ends until the discharge air temperature sensor (DATS) cools to the temperature set in the parameter.
  • Page 33 Table 6. Heat Pump Parameters Parameter Description Automatic Max When set to ON, the system will always run at MAX DEFROST when accumulated compressor off time is longer than 30 minutes and Defrost ambient temperature is less than 35°F (1.6°C). (Single and Two-Stage When ambient sensor temperature is higher than 40°F (4.5°C) then defrost termination will be 90°F (32°C).
  • Page 34 Table 6. Heat Pump Parameters Parameter Description High Normal Cooling Airflow Thermostat values shown are defaults. This value can be adjusted up or down to meet each application requirements. (Allied Air Variable The range is 450 - 2150 CFM. Default is dependent on unit capacity with an incremental adjustment of 25 CFM. capacity Heat Pumps Only) Fan Cycling...
  • Page 35 The range is 450 to 2150 CFM. Default is dependent on component match-up. Incremental adjustments are made in 5 CFM. Indoor Blower NOTE: All Comfort Sync A3 parameter default CFM values are based on Air Handler Control (AHC) DIP switch setting (non-communicat- Airflow ing value) prior to power up.
  • Page 36 Table 8. Air Handler Parameters Parameter Description Range of operation of the indoor blower during electric heat operation. Electric Heating Airflow The range is 1560 to 2150 CFM. Default is dependent on unit capacity with an incremental adjustment of 5 CFM. A unique name can be assigned to this component.
  • Page 37 The range is 450 - 2000 CFM with a default setting based on equipment type match-up. Adjustments are in increments of 5 CFM. Continuous NOTE: All Comfort Sync A3 parameter default CFM values are based on Furnace Control (IFC) DIP switch setting (non-communicating Indoor Blower value) prior to power up.
  • Page 38 Table 9. Furnace Parameters Parameter Description Range of operation of the indoor blower during high cooling operation. High Cooling The range is dependent of indoor unit model and size. Default is based on cooling demand with an Incremental adjustments of 25 Airflow CFM.
  • Page 39 Table 11. Thermostat (HD Display) Parameters Parameter Description This screen provides information concerning model number, serial number, hardware revision, software revision, language support About and equipment type name. Auto Options are on and off. Default is off. Brightness Brightness The brightness range is 0 - 100. Default 80. Touch either the + or - button to increase or decrease the setting. Value Display Indoor Options are on and off.
  • Page 40 EStS nFormatIon Verify Airflow Per Zone is the first screen to appear under this selection. If The dealer information screen will appear. The next screen will be for dealer no zoning is installed, zone airflow settings will be for zone 1 only. If zoning information.
  • Page 41 Dehumidification Settings Go to menu > settings > humidity. Under Humidity Control, select dehumidify to enable dehumidification. By default it is disabled. When dehumidify is enabled, the options are as follows and are dependent on equipment type and accessory installed. EHumIDIFICatIon EttIng ptIonS...
  • Page 42 Table 13. Dehumidification Control Modes of Operations Mode of Option Description Operation Both Staged and Variable Capacity Outdoor Units: Dehumidifies while servicing a cooling demand and will not over cool. Normal The overcooling slider is hidden from the user. Variable capacity units use the “comfort” table to run the system, regardless of the presence of a discharge air temperature sensor (DATS).
  • Page 43 38. display screen. There under outdoor temperature it will indicate sensor. • Wiring connections are listed in “Figure 9. Comfort Sync A3, Allied Air 10. Touch the home icon at the top left-hand corner of the screen to return to Communicating Indoor and Outdoor Units, Comfort Sync Zoning (Damper the home screen.
  • Page 44 Operation of Fresh Air Dampers with Environmental Overrides Ventilation (ERV, HRV and Fresh Air Damper) • When the Non-ASHRAE Compliant mode is selected (Timed), the system first checks for the outdoor temperature and dew point to be within the set This equipment is designed to provide fresh air while exhausting an equal parameter range before allowing ventilation to occur.
  • Page 45 NOTE: The thermostat can connect to a home wireless router that uses up to Table 14. Ventilation Control Modes 32 characters in the access point name (visible or hidden). Fresh Air Ventilation Control Mode Speed Speed Speed Speed 5. When connecting to a secure home Wi-Fi network, a password will be Damper requested.
  • Page 46 • Wireless speakers guide. • Bluetooth devices Comfort Sync A3 Thermostat App (Homeowner) • Garage door openers The free Comfort Sync A3 Thermostat app is available for use on iPhone , iPad • Neighbor’s wireless devices ® ® and Android™ devices. Control cooling/heating temperatures, fan operation, To eliminate a possible source of interference, temporally disable any devices set programs and set Away mode for multiple locations.
  • Page 47 The Comfort Sync A3 thermostat will not show any code for a soft disabled name, for example, thermostat, heat pump, etc.). control. When soft disabling occurs only the control that has been disabled * Current Allied Air variable capacity (inverter) outdoor units.
  • Page 48 • On air handler, furnace and outdoor controls, the soft-disabled state is displayed by double horizontal lines on seven-segment display. Unknown • On the Comfort Sync Zoning control and equipment interface modules, the green LED will Device flash 3 seconds on and 1 second off.
  • Page 49 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Thermostat found more than one indoor, outdoor unit or thermostat connected to the system. Thermostat will display the message “Too Many Devices of the Same Type”.
  • Page 50 Alert Text Code Condition Code The applicable system component (indoor unit, equipment interface or Comfort Sync Zoning control module or outdoor unit) has not communicated with thermostat for more than three minutes. • Check connections and voltages. • Ohm wires for electrical continuity.
  • Page 51 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code • Message sent by thermostat to unit after more than 15 minutes asking for initiating heating or cooling with no response from unit.
  • Page 52 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The system has not been able to turn on the heating for more than 45 minutes. No Heating HD Display when...
  • Page 53 • If zoning is installed and is wired directly from smart hub to Comfort Sync Zoning control then disconnect that wiring. Run control wiring from the Comfort Sync Zoning control directly to the indoor unit control.
  • Page 54 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The reporting component cannot find earth ground. The thermostat will shut down the system.
  • Page 55 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code There is a delay in the system component responding to the system. Typically this alert code does not cause any operational issues and will clear on its own.
  • Page 56 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code • Configuration jumper missing on equipment interface module. • Install the missing jumper. Configuration Equipment Moderate...
  • Page 57 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Lost communication with indoor blower motor. • Possible causes include power outage, brown-out, motor not powered, loose wiring, Furnace or air Indoor Blower condensation on system component control without cover on breaker.
  • Page 58 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The furnace low pressure switch is open. • Check pressure (inches w.c.) of the low pressure switch closing during a heat call. •...
  • Page 59 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The furnace low pressure switch is open while in run mode. • Check pressure (inches w.c.) of low pressure switch closing during a heat call. •...
  • Page 60 • Check for non-functioning zone dampers. NOTE: Limit trips will place the Comfort Sync Zoning into non-zone mode. NOTE: If this issue occurred on an Comfort Sync Zoning, the field will need to manually activate the zoning. Automatically clears when a heat call ends successfully.
  • Page 61 Flame Out of blockage in duct work). Seq. No Flame • Limit trips will place the Comfort Sync Zoning into non-zone mode. • Check for proper firing rate on furnace. • Check for non-functioning zone dampers. Automatically clears on successful ignition.
  • Page 62 • Indoor blower motor unable to start. Furnace or Indoor Blower • This could be due to seized bearing, stuck wheel, and obstructions. Comfort Sync Critical Motor Start Zoning (if • Replace motor, motor module or wheel if assembly does not operate or meet performance...
  • Page 63 • Replace discharge air sensor if necessary. Indoor unit or Discharge Air Comfort Sync NOTE: Confirm there is no short or open circuits in the Comfort Sync A3 thermostat connections Moderate Temp Sensor Zoning control to any of the other components in the communication system.
  • Page 64 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The O relay on the system component has failed. Either the pilot relay contacts did not close or the relay coil did not energize.
  • Page 65 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The O to R link on the furnace needs to be restored. • Configuration link R to O needs to be restored. IFC Error •...
  • Page 66 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Communicating Mode: In communicating mode, the DS-R terminal can be used on some furnaces models and will be used to monitor a field-installed interlock switch such as a float switch.
  • Page 67 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Interlock relay stuck (furnace or air handler modes only). • Interlock relay continuously sensed (with relay off). Moderate Equipment Interlock Relay...
  • Page 68 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The compressor rotor is locked up due to either: • Run capacitor short. •...
  • Page 69 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The low pressure switch has opened five times during one cooling or heating demand. •...
  • Page 70 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The outdoor coil sensor is either open, short-circuited or the temperature is out of sensor range.
  • Page 71 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code System Detection and Operation: The outdoor unit discharge line temperature sensor is either open, short-circuited or the temperature is out of sensor range.
  • Page 72 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The W output has reported more than five errors. • The system will shut down the outdoor unit. Equipment W Output •...
  • Page 73 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The liquid line temperature sensor has malfunctioned. • In normal operation after outdoor control recognizes sensors, the alert code will be sent if a valid temperature reading is lost.
  • Page 74 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The inverter has detected a high main input current condition • If condition is detected, outdoor unit will stop (compressor and fan) – moderate condition. •...
  • Page 75 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Compressor start-up failure. • If condition is detected, outdoor unit will stop (compressor and fan) – moderate condition. •...
  • Page 76 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The inverter has detected a DC link high voltage condition. • Error occurs when the DC link capacitor voltage is greater than 480VDC. •...
  • Page 77 > Check the Allied Air outdoor control software version by accessing the outdoor unit diagnostics section of the Comfort Sync A3 thermostat. The Allied Air outdoor control with software versions 1.27 and later have updated software that includes a six minute time delay during the cooling mode and a 11 minute delay during the heating mode after receiving an alert code 433, which typically occurs during start-up.
  • Page 78 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code • Outdoor control has lost communications with the inverter for greater than three minutes. •...
  • Page 79 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Inverter heat sink temperature exceeded limit • This occurs when the heat sink temperature exceeds the inverter limit. Inverter will issue inverter alert code 13 first and slow down to try to cool the heat sink.
  • Page 80 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The inverter has detected a power factor correction (PFC) circuit over-current condition • The inverter has detected an PFC over current condition. This may be caused by a high load condition, high pressure, or outdoor fan failure.
  • Page 81 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Compressor slowdown due to high heat sink temperature. • Heat sink temperature is approaching limit. •...
  • Page 82 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code This alert code is for more information than an issue with the system. •...
  • Page 83 • If after 10 minutes the condition does not change, the applicable alert code (542, 543, 544 or 545) is escalated by the Comfort Sync A3 thermostat to critical. System will continue to operate in central mode. Zone 4 Temp...
  • Page 84 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code Pre-coil discharge air temperature sensor problem (dual-fuel mode only). This alert code will escalate from moderate to critical after ten (10) minutes. This may result in no heating or cooling operations.
  • Page 85 Table 16. Alert Codes and Troubleshooting Inverter Applicable Actual Displayed Alert Priority Flash Component or System Operational State and Troubleshooting Tip Component Alert Text Code Condition Code The thermostat is reading indoor temperatures above the pre-set limit. The thermostat has a built-in non-adjustable high limit of 99°F.
  • Page 86 Typically the thermostat will send a command to the unknown device and place it in a soft disable state. The Comfort Sync A3 control with the soft disable state will indicate so as follows: • On air handler, furnace and outdoor controls, the state is displayed by double horizontal lines...
  • Page 87 Applicable controls are Outdoor Unit with 2.615 thermostats, Allied Equipment Interface Module (EIM) and Comfort Sync A3 Zoning (DCM) and all Allied communicating air handler, furnaces and outdoor Outdoor Unit with units. Use these voltages to: 2.45...
  • Page 88 Index Display Outdoor Temperature Indoor Humidity 39 Blower On Delay 38 Calibration 26 Advanced Dehumidification Descrip- Ventilation Outdoor Weather 39 Heating Lockout Time 24 Reading Calibration 18 tions 41 Control Mode 44 Heating Mode 24 Source 39 Airflow Profile - Cooling 35, 37 Control Mode Parameters 29 Indoor Blower Off Delay 36, 38 Overcooling 41...

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