Addison DC Series - User Manual

Questions and Answers

S
Sharon ValenzuelaAug 25, 2025
What to do if Addison DC compressor starts but cuts out on high pressure switch?
- W
  William SmithAug 25, 2025
  If your Addison Air Conditioner's compressor starts but then cuts out due to the high pressure switch, it could be due to several reasons. First, check the pressures and charge by subcooling if there is a refrigerant overcharge. Second, verify the condenser fan control has the correct setting. Third, inspect the fan motor for defects. Fourth, ensure the condenser coil inlet is not obstructed or dirty, checking for proper clearances and possible air recirculation. Fifth, check the high side equalized pressure reading with the equivalent outdoor temperature to ensure there isn't air or non-condensables in the system. Sixth, check the calibration of the high pressure switch. Finally, check the discharge and liquid line pressures and the TXV.
R
Robert JonesAug 25, 2025
What to do if Addison Air Conditioner compressor starts but cuts out on low pressure switch?
- M
  Michael WhiteAug 26, 2025
  If your Addison Air Conditioner compressor starts but then cuts out on the low pressure switch, there could be several reasons. First, check the sightglass and pressures to ensure there isn't a low refrigerant charge. Second, check for restricted airflow due to a dirty evaporator coil or filters, closed dampers, an iced evaporator, improper belt adjustment, proper motor amps, or duct design issues. Third, inspect for any restrictions in the liquid line by checking the head pressure, examining and adjusting the TXV if it's not functioning correctly, and checking the pressure drop across the filter drier. Fourth, check the calibration of the low pressure switch.
W
wwilliamsAug 27, 2025
Why does Addison DC Air Conditioner compressor cut out on thermal overload?
- K
  Keith MurrayAug 27, 2025
  If your Addison Air Conditioner compressor is cutting out on thermal overload, several factors could be responsible. First, check the voltage to ensure it's not too low. Second, check the running amperage and conditions described under “high discharge pressure” if there is sustained high discharge pressure. Third, check the TXV setting and for air in the system if there are high suction and discharge pressures. Fourth, allow the compressor to cool for two hours if it's hot, then recheck for an open circuit. Fifth, check the run capacitor for the compressor and fan motor for defects. Sixth, check the subcooling to ensure proper refrigerant charge. Seventh, check for low oil level. Finally, check the dome temperature of the compressor.
D
Destiny DiazAug 27, 2025
How to fix a noisy Addison DC compressor?
- S
  Shaun HillAug 27, 2025
  To address a noisy Addison Air Conditioner compressor, consider these steps. First, if you have a scroll compressor, reverse the wiring at the disconnect switch and recheck for correct evaporator blower rotation. Second, check the pressures and subcooling to ensure there isn't a refrigerant overcharge. Third, check the oil level in hermetic compressors. Fourth, check the TXV setting and for refrigerant overcharge if there is liquid floodback. Fifth, dampen tubing vibration by taping or clamping, and bend tubing away from contact where possible. Sixth, check internal parts (semi-herm.).
A
Anthony SanchezSep 15, 2025
How to troubleshoot erratic fan operation in my Addison DC?
- R
  Richard MckinneySep 15, 2025
  To troubleshoot erratic fan operation in your Addison Air Conditioner: 1. Check to see if control voltage (24 V AC) is on the same phase as the motor if the control is not wired correctly. 2. Clean the condenser coil if it is dirty or blocked.
Y
Yolanda ToddSep 13, 2025
Why is liquid line frosted or wet in my Addison DC?
- K
  Kenneth WebbSep 13, 2025
  If the liquid line of your Addison Air Conditioner is frosted or wet, it is because there is a restriction upstream of point of frosting in the liquid line.
R
robertcolemanSep 14, 2025
Why is suction line frosting in my Addison DC Air Conditioner?
- M
  Melanie MorganSep 14, 2025
  If the suction line of your Addison Air Conditioner is frosting, first, check the airflow and drive for loose parts, belts, and closed dampers if there is insufficient evaporator airflow. Second, there is a restriction upstream of point of frosting in suction or liquid line. Third, check the bulb of the TXV if the expansion valve is malfunctioning or defective.
W
Willie WaltersSep 6, 2025
Why is Addison DC running cycle too long?
- U
  uochoaSep 6, 2025
  If the Addison Air Conditioner is running cycles too long or operates continuously, first, check the subcooling if the refrigeration is undercharged. Second, check the filter, coil, and airflow if the filter or evaporator coil is dirty. Third, check the coil and airflow if the condenser coil is dirty or clogged. Fourth, check the equalized high side pressure with the equivalent outdoor temperature if there is air or other non-condensables in the system. Fifth, check the compressor for proper operation if it is defective. Sixth, check for restrictions in the refrigerant circuit if there is a restriction in the suction and liquid line. Finally, check the thermostat, shorts in wiring, slave relay compressor contactor if the control contacts are stuck.
L
Lisa MooreSep 3, 2025
How to fix noisy unit operation in my Addison DC Air Conditioner?
- D
  dhawkinsSep 3, 2025
  If your Addison Air Conditioner unit is operating with noisy operation, here are some troubleshooting steps: 1. Check the blower, motor, and drive for faulty adjustment, noisy bearings, loose parts, or if the blower is out of balance, if there is blower rotational noise. 2. Check the ductwork if there is air noise and the air velocity is too high. 3. Check for adequate control voltage, shorts or breaks, the thermostat, and contact points if there is a chattering contactor. 4. Dampen by taping or clamping, and bend tubing away from contact when possible, if there is tubing rattle.
R
Ryan KellySep 4, 2025
Why is liquid line too hot in my Addison DC?
- M
  msweeneySep 5, 2025
  If you notice the liquid line of your Addison Air Conditioner is too hot, it could be due to a refrigerant undercharge, in this case adjust the charge by subcooling, or high discharge pressure, in this case see “high discharge pressure”.

Summary

Safety Labeling and Signal Words

Danger, Warning, and Caution Signal Words

Defines the signal words DANGER, WARNING, and CAUTION for hazard levels.

Signal Words in Manuals

Explains the usage of signal words within the manual text.

Danger Label Appearance

Describes the visual characteristics of a DANGER label.

Warning Label Appearance

Describes the visual characteristics of a WARNING label.

Caution Label Appearance

Describes the visual characteristics of a CAUTION label.

Environmental and Safety Precautions

Covers warnings about refrigerants and environmental impact.

General Description

Unpacking and Inspection

Procedure for checking unit condition upon receipt.

Design Certification

Details on unit certifications and standards compliance.

Installation

Unit Location and Clearances

Requirements for unit placement and minimum spacing.

Codes and Ordinances

Compliance with installation regulations and codes.

Curb Installation and Protrusions

Procedures for mounting units on roof curbs.

Rigging Procedures

Guidelines for safely lifting and moving the unit.

Rigging Removal

Steps for safely detaching rigging equipment.

Ductwork Installation

Guidelines for connecting duct systems to the unit.

Condensate Piping

Requirements for condensate drainage and piping.

Clearances

Minimum spacing requirements for access and safety.

Combustion Air Clearances

Specific clearances for combustion air intake.

Electrical

Wiring Connections

Details on power and low voltage wiring procedures.

Independent Power Source

Recommendation for a separate power source for service.

Main Power Wiring

Requirements for unit power supply connections.

Grounding Requirements

Electrical grounding standards and procedures.

Control System Wiring

Guidelines for low voltage control wiring.

Gas Piping and Venting

Gas Furnace Installation

Specific installation requirements for gas furnace models.

Cooling System Options

Hot Gas Bypass Operation

Description of capacity control using hot gas bypass.

Head Pressure Control

Methods for maintaining optimal head pressure.

Variable Speed Control

Management of variable speed fan operation.

Adjustable High and Low Pressure Switches

Settings for pressure-sensitive safety switches.

Mechanical Adjustments

Setting Fan RPM

Procedure for adjusting evaporator fan speed.

Fan Rotation Check

Verifying correct blower motor rotation direction.

Drive Belt Tension and Alignment

Procedures for maintaining drive belt tension and alignment.

Checking Pulley Alignment

Procedure to verify pulley alignment for optimal performance.

Checking Tension and Deflection

Method for checking drive belt tension and deflection.

Electrical System Options

Airflow Switch

Safety feature to ensure blower operation.

Clogged Filter Indicator

System for detecting and signaling dirty filters.

Convenience Outlet

Electrical outlet for service and maintenance use.

Exhaust Fan Interlock

Integration with building exhaust fans for safety.

Power Through the Curb

Method for routing wiring through the roof curb.

Firestat Control

Safety control monitoring return air temperature.

Sure-Trip Control

Automatic safety shutdown for electrical power issues.

DDC Controls

Overview of direct digital control system integration.

Sequence of Operation

Heating: Hydronic or Steam

Operational sequence for hydronic and steam heating modes.

Gas Heat Operation

Operational sequence for gas heating functions.

Electric Heat Operation

Operational sequence for electric heating functions.

Energy Conservation Wheel

Seal Checks and Adjustments

Procedures for checking and adjusting ECW seals.

Variable Speed Drive (VFD) Configuration

Setup and programming for VFD control.

Maintenance Procedures

Guidelines for unit maintenance, including bearings and motors.

Trouble Shooting Guides

Compressor Start Issues

Diagnosing problems when the compressor fails to start.

Low Pressure Switch Cutouts

Troubleshooting compressor cutouts related to low pressure.

High Pressure Switch Cutouts

Troubleshooting compressor cutouts related to high pressure.

Thermal Overload Issues

Addressing compressor thermal overload trips.

Oil Failure Control Problems

Diagnosing issues with the oil failure control system.

Noisy Compressor Diagnosis

Identifying causes of abnormal compressor noise.

Noisy Unit Operation

Troubleshooting general unit noise and vibrations.

High Suction Pressure Issues

Diagnosing and resolving high suction pressure conditions.

High Discharge Pressure Issues

Diagnosing and resolving high discharge pressure conditions.

Low Suction Pressure Issues

Diagnosing and resolving low suction pressure conditions.

Low Head Pressure Issues

Diagnosing and resolving low head pressure conditions.

Compressor Short Cycling

Troubleshooting frequent compressor on/off cycles.

Continuous Operation Issues

Diagnosing units that operate for extended periods.

High Supply Air Temperature

Diagnosing and resolving high supply air temperature.

Supply Air Temperature Issues

Troubleshooting general supply air temperature problems.

Liquid Line Problems

Diagnosing issues related to the unit's liquid line.

Suction Line Frosting

Troubleshooting suction line frosting and ice formation.

Blower Motor Not Running

Diagnosing and resolving blower motor failure.

Varispeed Condenser Head Pressure Control

Fan Operation Issues

Troubleshooting VFD fan operation and control problems.

Fan Modulation and Speed Issues

Diagnosing fan modulation and speed control problems.

Electronic-Regulator

Control Valve Operation Problems

Diagnosing issues with automatic control valve operation.

Gas Flow and High Fire Issues

Troubleshooting gas flow and continuous high fire conditions.

Low;Medium Fire and Cycling Issues

Troubleshooting continuous low/medium fire and valve cycling.

Discharge Air Temperature Errors

Diagnosing incorrect discharge air temperature readings.

Erratic Flame Conditions

Troubleshooting pulsating or erratic flame issues.

Addison DC Series Specifications

General

Brand	Addison
Model	DC Series
Category	Air Conditioner
Language	English

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