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General| Brand | Carrier |
|---|---|
| Model | 38AE012 |
| Category | Air Conditioner |
| Language | English |
Details checks required before installing the unit, including uncrating and inspection.
Provides instructions on how to safely rig, lift, and mount the unit.
Guides on sizing and connecting refrigerant lines, considering length and lift.
Instructions for installing field-supplied accessories like winter start or low-ambient controls.
Covers power and control wiring requirements, grounding, and disconnect switch installation.
Procedures for evacuating and dehydrating the refrigerant system using standard methods.
Method for leak testing the refrigerant system using pressure and inert gas.
How to energize crankcase heaters for 24 hours to remove refrigerant from oil.
Guidance on adding the initial refrigerant charge by weight using specific procedures.
Essential checks before starting the unit, including oil level, bolts, wiring, and service valves.
Setting the thermostat and the delay before compressor start.
Procedure for checking and adding compressor oil after initial run time.
Explains how to measure and adjust refrigerant charge using pressure and temperature charts.
Verifying operation of all safety controls and ensuring panel covers are closed.
Describes the sequence of operations during cooling mode, including thermostat stages and fan activation.
Explains the sequence for heating operation, involving the thermostat and fan relay.
Details how head pressure control cycles the fans based on liquid line pressure.
How the winter start control bypasses the low-pressure switch during start-up.
Describes the suction pressure-actuated unloader and its adjustment.
Explains the fan cycling based on liquid pressure for head pressure control.
Details the function of the Time Guard II circuit for preventing short-cycling.
Information on installing and using the winter start control accessory.
Explains the purpose of the crankcase heater to prevent oil dilution.
Information on outdoor fan construction, mounting, and motor bearings.
Notes that fan motors have sealed bearings and no lubrication is provided.
Instructions on how to clean the outdoor coils using water, air, or brushing.
Lists potential causes and solutions when the compressor fails to run.
Troubleshooting steps for when the compressor stops due to high-pressure switch activation.
Solutions for issues causing the compressor to cycle on the low-pressure switch.
Identifies causes of restricted airflow and provides cleaning and checking procedures.
Troubleshooting steps for a stopped indoor-air fan, checking connections and motor.
Addresses issues causing insufficient cooling while the compressor is running.
Explains causes of low suction pressure and how to resolve them.
Troubleshooting steps for high suction pressure.
Solutions for when the unit runs for extended or continuous periods.
Addresses causes of system noise, including piping vibration and compressor noise.
Identifies reasons for compressor oil loss and necessary repair actions.
Explains causes of a frosted suction line, like expansion valve issues.
Troubleshooting for a hot liquid line, often related to refrigerant shortage or expansion valve issues.
Addresses causes of a frosted liquid line, such as a restricted filter drier.
Solutions for when the compressor fails to unload its capacity control cylinders.
Troubleshooting steps for when the compressor fails to load (engage its full capacity).
Fields for recording outdoor/indoor unit model and serial numbers, and accessories.
Checklist covering outdoor unit, controls, indoor unit, and piping for readiness.
Procedures for checking fan speeds and recording operating measurements like pressures and temperatures.
