Carrier 38GL024G User Manual

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38GL...G

38YY...G / 38YYS...G

INSTALLATION MANUAL

Table of Contents

Questions and Answers:

L
Larry RamirezAug 13, 2025
What to do if my Carrier 38GL024G compressor and fan of the outdoor unit will not start?
- A
  Adam MitchellAug 13, 2025
  If the compressor and fan of the outdoor unit won't start, begin by checking the mains power connections and ensuring the unit is switched to the ON position. If that doesn't work, wait for 3 minutes to see if the compressor cycling protection is active. Check and eliminate the cause (refer to “Additional installation instructions”). Also, examine the electrical connections for looseness or errors and repair them if necessary.
A
Annette HardyAug 17, 2025
Why does my Carrier 38GL024G compressor run continuously?
- A
  Anthony BrownAug 17, 2025
  If the compressor runs continuously, check the temperature selection. A low refrigerant charge could also be the cause, so verify and add refrigerant if needed. Additionally, air or other non-condensable gases in the circuit might be the issue, requiring you to drain the refrigerant, evacuate, and recharge the system. Finally, check for any obstructions and clean the filter.
L
Laura AndersonAug 21, 2025
What to do if my Carrier 38GL024G discharge pressure is too high?
- S
  Samuel GibsonAug 21, 2025
  If the discharge pressure is too high, start by cleaning the outdoor coil or removing any obstructions. If the refrigerant charge is too high, drain some refrigerant. Also, if there is air or other non-condensable gases in the circuit, drain the refrigerant, evacuate, and recharge the system. Check the head pressure controller by connecting the fan directly and replace the HPC if necessary.
D
Dorothy RobbinsAug 25, 2025
What to do if my Carrier Air Conditioner compressor will not start, but outdoor fan is running?
- M
  Michael CamachoAug 26, 2025
  If the compressor won't start but the outdoor fan is running, check the compressor's electrical connections for looseness or errors and repair them. Also, the compressor might be burnt out, seized, or its protection device could be activated, so check for the cause and replace the compressor if necessary.
T
teresagarciaAug 28, 2025
What to do if my Carrier 38GL024G Air Conditioner has frequent ice build-up on outdoor coil during heating?
- J
  James AveryAug 28, 2025
  If there's frequent ice build-up on the outdoor coil during heating, check if the outdoor fan is working correctly and repair if needed. Also, check the electrical connections between the indoor and outdoor units and repair any wrong connections.
T
Thomas PageSep 1, 2025
What to do if my Carrier 38GL024G compressor starts, but stops due to its overtemperature protection?
- M
  Mary JacksonSep 1, 2025
  If the compressor starts but stops due to overtemperature protection, it could be due to a wrong refrigerant charge (excessive or low) or air/non-condensable gases in the circuit; in this case, drain refrigerant, evacuate, and recharge. Remove any obstructions. Check cause and repair. Check and replace. Check and remove obstructions.
J
Jeanne WaltersSep 4, 2025
What to do if my Carrier Air Conditioner discharge pressure is too low?
- J
  jennifermcdanielSep 5, 2025
  If the discharge pressure is too low, it could be due to a low refrigerant charge, in which case you should add refrigerant. Another cause could be a dirty or obstructed outdoor coil, so clean or remove any obstructions. Also, a dirty indoor unit air filter can cause this issue, so clean the filter.
X
xjordanSep 8, 2025
What causes outdoor fan cycling due to its overtemperature protection in Carrier 38GL024G Air Conditioner?
- M
  mooremichaelSep 8, 2025
  If the outdoor fan is cycling due to its overtemperature protection, the fan capacitor might be faulty, so replace it. Check connections and repair.

Carrier 38GL024G Specifications

General

Brand	Carrier
Model	38GL024G
Category	Air Conditioner
Language	English

Summary

Carrier Installation Manual

Dimensions and Weight

Unit Connections

Details pipe diameter and maximum length for unit connections.

Minimum Clearances

Operating Limits

Specifies outdoor/indoor temperature ranges for cooling and heating.

General Information

Unit Installation Procedures

Covers general installation procedures and precautions.

Installation Site Selection

Guidelines for selecting an appropriate location for the outdoor unit.

Installation Warnings to Avoid

Refrigerant Connections: Preparation

Dry Nitrogen Brazing

Procedure for connecting refrigerant lines using dry nitrogen.

System Vacuum Procedure

Process of creating a vacuum in the system using a vacuum pump.

Refrigerant Connections: Flaring and Torque

Flaring Tubing Ends

Proper method for flaring copper tube ends for connections.

Tightening Torque Specifications

Recommended torque values for refrigerant fittings.

Refrigerant Connections: Purging and Leak Check

Air Purging and Leak Detection

Procedures for purging air and checking for refrigerant leaks.

Electrical Connections (018-024 Size)

Electrical Connections (028-048 Size)

Electrical Connections Overview

Electrical Data Table

Table detailing power input, starting current, and main power connections.

Pump Down and Refrigerant Charge Check

Unit Maintenance and Troubleshooting

Unit Maintenance Procedures

Instructions for cleaning the coil and general maintenance.

Troubleshooting Common Issues

Common issues and solutions for compressor, fan, and system operation.

Installation Instructions Supplement

Operating Range for Heat Pumps

Specifies operating limits for heat pump units.

HPC (Head Pressure Controller) Features

Details the features and function of the Head Pressure Controller.

Condensing Temperature Controller

Condensing Temperature Controller Operation

Explains operation modes and temperature settings of the controller.

Condensing Temperature Controller Troubleshooting

Addresses potential issues with the condensing temperature controller.

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