Carrier 024-048 Service Manual

Residential Mobile Home Small Package Products
Air Conditioners and Heat Pumps
Using R-410A Refrigerant

Table of Contents

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation Guideline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 1 - Required Field-Installed Accessories for Air Conditioners
and Heat Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Low-Ambient Cooling Guideline . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Cabinet Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 2 - Defrost Control Speed-Up Timing Sequence . . . . . . . 14
Scroll Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reciprocating Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 3 - Compressor Information . . . . . . . . . . . . . . . . . . . . . . . 21
Table 4 - Piston/TXV Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Refrigeration System Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 5 - Minimum Airflow for Safe Electric Heater Operation 28
Table 6 - Superheat Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 7 - 13.4 SEER2 Required Subcooling. . . . . . . . . . . . . . . . 29
ECM Fan Motor Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 8 - Pressure vs. Temperature Chart - R-410A Refrigerant 38
024-048 A/C and 024-036 Heat Pump
060 A/C and 042-060 Heat Pump
Fig. 1 - A/C and Heat Pump
Service Manual
Installation, service, and repair of these units should be attempted only
by trained service technicians familiar with standard service instruction
and training material.
All equipment should be installed in accordance with accepted practices
and unit Installation Instructions, and in compliance with all national and
local codes. Power should be turned off when servicing or repairing
electrical components. Extreme caution should be observed when
troubleshooting electrical components with power on. Observe all
warning notices posted on equipment and in instructions or manuals.
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could result in personal injury or
equipment damage.
R-410A systems operate at higher pressures than standard R-22
systems. Do not use R-22 service equipment or components on these
R-410A units. Ensure service equipment is rated for R-410A.
Refrigeration systems contain refrigerant under pressure. Extreme
caution should be observed when handling refrigerants. Wear safety
glasses and gloves to prevent personal injury. During normal system
operations, some components are hot and can cause burns. Rotating fan
blades can cause personal injury. Appropriate safety considerations are
posted throughout this manual where potentially dangerous techniques
are addressed.
Follow all safety codes. Wear safety glasses, protective clothing, and
work gloves. Have a fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions included in literature and
attached to the unit. Consult local building codes, the current editions of
the National
90B-Installation Warm Air Heating and A/C Systems (Residential).
In Canada refer to the current editions of the Canadian Electrical Code
CSA C22.1.
A10165
PERSONAL INJURY AND PROPERTY DAMAGE
HAZARD
For continued performance, reliability, and safety, the only approved
accessories and replacement parts are those specified by the equipment
manufacturer. The use of non-manufacturer approved parts and
accessories could invalidate the equipment limited warranty and result
in fire risk, equipment malfunction, and failure. Please review
manufacturer's instructions and replacement part catalogs available
from your equipment supplier.
This document provides required system information necessary to
install, service, repair or maintain the small package products (SPP) air
A150067
conditioners and heat pumps using R-410A refrigerant.
Refer to the unit Product Data/Technical specifications for rating
information, electrical data, required clearances, additional component

Safety Considerations

WARNING
!
Electrical Code (NEC)
WARNING
!

Introduction

NFPA 70 and NFPA