Carrier 40DMC036 - User Manual

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INSTALLATION MANUAL

Table of Contents

Questions and Answers:

B
Brandi PerezAug 13, 2025
What to do if my Carrier Air Conditioner compressor and fan of the outdoor unit will not start?
- B
  Brittney BurgessAug 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.
C
Cindy RobinsonAug 17, 2025
Why does my Carrier 40DMC036 compressor run continuously?
- S
  Summer SimmonsAug 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.
N
Nicholas RodriguezAug 21, 2025
What to do if my Carrier 40DMC036 discharge pressure is too high?
- Z
  zmartinAug 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.
N
Nicole WeeksAug 25, 2025
What to do if my Carrier Air Conditioner compressor will not start, but outdoor fan is running?
- C
  Christopher BakerAug 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.
C
christopherwilsonAug 28, 2025
What to do if my Carrier 40DMC036 has frequent ice build-up on outdoor coil during heating?
- M
  Marissa PowellAug 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.
R
Robert LoweSep 1, 2025
What to do if my Carrier 40DMC036 compressor starts, but stops due to its overtemperature protection?
- S
  Susan FoleySep 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.
K
Katelyn GutierrezSep 5, 2025
What to do if my Carrier Air Conditioner discharge pressure is too low?
- L
  Lisa BellSep 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.
M
Melissa BurkeSep 9, 2025
What causes outdoor fan cycling due to its overtemperature protection in Carrier Air Conditioner?
- H
  Heather JenkinsSep 9, 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 40DMC036 Specifications

General

Voltage	208/230V
Phase	1
Indoor Unit Type	Ducted
Cooling Capacity	36000 BTU/h
Refrigerant Type	R410A
Compressor Type	Scroll

Summary

Installer and Technician Safety Briefing

Physical Specifications

Unit Dimensions

External measurements of the outdoor unit models.

Pipe Connections Overview

Details on pipe diameter, length, and type for refrigerant lines.

Installation Clearances and Operating Limits

Operating Limits for Conditions

Specifies outdoor and indoor temperature limits for cooling and heating.

General Installation Information

Site Selection Guidelines

Guidelines for selecting an optimal and safe location for the outdoor unit.

Installation Warnings and Best Practices

Refrigerant System Connections

Tubing Flaring and Unit Connection

Procedures for flaring tubing ends and connecting them to the unit.

System Air Purging and Leak Detection

Steps for purging air from the system and performing a leak check.

Electrical System Wiring and Data

Electrical Wiring Diagrams

Visual guides for connecting electrical components for different unit types.

Electrical Data and Power Specifications

Table detailing power consumption, starting current, and wire sizing.

Refrigerant Pump Down and Charge Check

Unit Maintenance and Troubleshooting

Coil Cleaning and Unit Care

Procedures for cleaning the coil and general maintenance tasks.

Troubleshooting Common Unit Faults

Diagnosis and solutions for common compressor, fan, and pressure problems.

Special Model Installation Supplement

Enhanced Features for Specific Models

Details on Head Pressure Controller, Loss of Refrigerant Pressure Switch, High Pressure Cut-out.

Condensing Temperature Controller Functionality

Controller Operation Modes Explained

Explains full voltage, low voltage, and proportional band modes of the controller.

Controller Troubleshooting Notes

Notes on potential issues like HIP tripping during initial start-up.

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