Allied Air Enterprises 4AC16LT manual Fault Description Troubleshooting Information Status

Page 18

 

 

 

Flash Codes (cont.)

 

 

 

 

 

 

LED

Fault Description

Troubleshooting Information

 

 

Status

 

 

 

 

 

 

 

 

 

 

 

ALERT

Short Cycling

1. Thermostat demand signal is intermittent

 

 

(Yellow)

Compressor is

2. Time delay relay or control board defective

 

 

Flash

running

3. If high pressure switch present, go to Flash Code 2 info

 

 

Code 3

only briefly

4. If low pressure switch present, go to Flash Code 1 info

 

 

 

 

 

 

 

 

 

1. Run capacitor has failed

 

 

ALERT

 

2. Low line voltage (contact utility if voltage at disconnect is low)

 

 

(Yellow)

Locked Rotor

* Check wiring connections

 

 

Flash

3. Excessive liquid refrigerant in compressor

 

 

 

 

 

Code 4

 

4. Compressor bearings are seized

 

 

 

 

*Measure compressor oil level

 

 

 

 

 

 

 

 

 

1. Outdoor unit power disconnect is open

 

 

 

 

2. Compressor circuit breaker or fuse(s) is open

 

 

 

 

3. Compressor contactor has failed open

 

 

 

 

* Check compressor contactor wiring and connectors

 

 

ALERT

 

* Check for compressor contactor failure (burned, pitted, or open)

 

 

(Yellow)

Open Circuit

* Check wiring and connectors between supply and compressor

 

 

Flash

* Check for low pilot voltage at compressor contactor coil

 

 

 

 

 

Code 5

 

4. High pressure switch is open and requires manual reset

 

 

 

 

5. Open circuit in compressor supply wiring or connections

 

 

 

 

6. Unusually long compressor protector reset time due to extreme ambient temperature

 

 

 

 

7. Compressor windings are damaged

 

 

 

 

* Check compressor motor winding resistance

 

 

 

 

 

 

 

ALERT

 

1. Run capacitor has failed

 

 

Open Start Circuit

2. Open circuit in compressor start wiring or connections

 

 

(Yellow)

 

 

Current only in run

* Check wiring and connectors between supply and the compressor S terminal

 

 

Flash

 

 

circuit

3. Compressor start winding is damaged

 

 

Code 6

 

 

 

* Check compressor motor winding resistance

 

 

 

 

 

 

 

 

 

 

 

ALERT

Open Run Circuit

1. Open circuit in compressor run wiring or connections

 

 

(Yellow)

* Check wiring and connectors between supply and the compressor R terminal

 

 

Current only in start

 

 

Flash

2. Compressor run winding is damaged

 

 

circuit

 

 

Code 7

* Check compressor motor winding resistance

 

 

 

 

 

 

 

 

 

 

ALERT

Welded Contactor

 

 

 

(Yellow)

1. Compressor contactor has failed closed

 

 

Compressor always

 

 

Flash

2. Thermostat demand signal not connected to module

 

 

runs

 

 

Code 8

 

 

 

 

 

 

 

 

 

 

 

 

ALERT

Low Voltage

1. Control circuit transformer is overloaded

 

 

(Yellow)

 

 

Control circuit less

2. Low line voltage (contact utility if voltage at disconnect is low)

 

 

Flash

 

 

than 17VAC

* Check wiring conditions

 

 

Code 9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 10

506467-01

Issue 1008

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Contents 4AC16LT Series Lennox International Inc. CompanyTorque Table InstallationInstallation Clearances Slab MountingThermostat Designations Electrical WiringSlab Mounting Refrigerant PipingInstalling Refrigerant Line PlacementLine Set Isolation Outside Unit Placement Installation Refrigerant Line Sets Installing Horizontal RunsRefrigerant Metering Device on Refrigerant Line Sets Transition from Vertical to Horizontal Flushing Connections Flushing Existing Line Set and Indoor CoilRefrigerant Metering Device TXV DataTo Close Liquid or Suction Line Service Valve Liquid and Suction Line Service ValvesTo Access the Schrader Port Suction Line Ball Type Service ValveUsing an Electronic Leak Detector Ball Type Service Valve Valve OpenLeak Testing EvacuationPage Refrigerant Charge Adjustment START-UPRefrigerant Charging Charge Using Weigh-In Method Blocking Outdoor CoilR410A Temperature/Pressure Chart Subcooling ValuesApproach Values for TXV Systems Issue Thermostat Demand Wiring Interpreting the Diagnostic LEDs24VAC Power Wiring OperationFlash Codes LEDFault Description Troubleshooting Information Status Miswired Module Troubleshooting Sensing holesMaintenance Indoor CoilIndoor Unit Start-Up and Performance Checklist Wiring Diagram P/N

4AC16LT specifications

The Allied Air Enterprises 4AC16LT is a highly efficient air conditioning unit designed to provide optimal cooling solutions for residential and light commercial applications. This model exemplifies the balance of innovative technology and user-friendly features, making it a popular choice for homeowners and contractors alike.

One of the standout characteristics of the 4AC16LT is its ENERGY STAR certification, which signifies its energy efficiency and eco-friendly operation. The unit is engineered to reduce energy consumption while delivering reliable performance, ultimately helping to lower electricity bills for consumers.

The 4AC16LT features a scroll compressor, a technology known for its durability and efficiency. This compressor design not only improves the overall cooling efficiency but also minimizes operational noise, providing a quiet and comfortable indoor environment. The unit's sound levels are notably reduced, making it ideal for residential settings where noise can be a significant concern.

In addition to its efficient compressor, the unit boasts a range of advanced technologies. The integrated smart diagnostic features allow technicians to quickly identify and troubleshoot issues, streamlining maintenance and reducing downtime. This is particularly beneficial for contractors, as it enhances service response times and customer satisfaction.

The 4AC16LT is also equipped with a durable cabinet design, which is resistant to rust and corrosion, ensuring longevity and reliability in various environmental conditions. The pre-painted steel casing not only enhances the unit’s durability but also adds an aesthetic appeal that blends well with most home exteriors.

Further enhancing its appeal, the unit utilizes environmentally friendly refrigerants that comply with current regulations. This commitment to sustainability demonstrates Allied Air Enterprises’ focus on innovation while caring for the environment.

Moreover, the model is designed with ease of installation in mind. The compact size and lightweight construction of the 4AC16LT facilitate straightforward installation, saving time and labor costs for technicians.

In summary, the Allied Air Enterprises 4AC16LT air conditioning unit is a top-tier choice that incorporates energy efficiency, advanced technology, and a user-friendly design. Its combination of quiet operation, robust features, and commitment to sustainability makes it an excellent investment for anyone seeking reliable indoor comfort.
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