Carrier 38GVM Series User Manual

Service Manual
38GVM / 40GVM
Multi---Split High---Wall Ductless Split System
38GVM --- Size 18k, 24k, 30k, 36k and 42k
40GVM --- Size 9k, 12k, and 18k
This Service Manual provides the necessary information to service,
repair, and maintain the 38/40GVM.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.........................
MODEL / SERIAL NUMBER NOMENCLATURE 2.........
STANDARD FEATURES AND ACCESSORIES 3...........
PHYSICAL DATA 4...................................
AHRI CAPACITY RATINGS 6..........................
AIRTHROW DATA 6..................................
SOUND RATINGS 6..................................
DIMENSIONS -- INDOOR 7............................
DIMENSIONS -- OUTDOOR 8..........................
CLEARANCES 9.....................................
SYSTEM OPERATING ENVELOPE 11...................
ELECTRICAL DATA 12...............................
CONNECTION DIAGRAM 13..........................
WIRING DIAGRAMS 14...............................
REFRIGERATION SYSTEM DIAGRAMS 19..............
SYSTEM EVACUATION AND CHARGING 21.............
REMOTE CONTROL AND FUNCTIONS 22...............
TROUBLESHOOTING 28..............................
APPENDIX TABLES 44..............................
UNIT REMOVAL PROCEDURES 47.....................
EXPLOSION HAZARD
Failure to follow this warning could
result in death, serious personal injury,
and/or property damage.
Never use air or gases containing
oxygen for leak testing or operating
refrigerant compressors. Pressurized
mixtures of air or gases containing
oxygen can lead to an explosion.
!
WARNING
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have 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 and
National Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety--alert symbol
!
!
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than one disconnect switch. Lock out
and tag switch with a suitable warning label.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not bury more than 36 in. (914 mm) of refrigerant pipe
in the ground. If any section of pipe is buried, there must be
a 6 in. (152 mm) vertical rise to the valve connections on
the outdoor units. If more than the recommended length is
buried, refrigerant may migrate to the cooler buried section
during extended periods of system shutdown. This causes
refrigerant slugging and could possibly damage the
compressor at start--up.

Carrier 38GVM Series Specifications

General

Series	38GVM
Cooling Capacity (BTU/h)	9, 000 - 36, 000
Heating Capacity (BTU/h)	9, 000 - 36, 000
Refrigerant	R-410A
Dimensions (Indoor Unit)	Varies by model
Dimensions (Outdoor Unit)	Varies by model
Weight (Indoor Unit)	Varies by model
Weight (Outdoor Unit)	Varies by model
Voltage	208-230V

Summary

Safety Considerations

General Safety Information

General safety guidelines, signal words, and precautions.

Explosion Hazard Warning

Warning about explosion risk from oxygen mixtures.

Equipment Damage Hazard Caution

Physical Data - 38GVM Outdoor Units

38GVM Outdoor Unit Specifications

Physical Data - 40GVM Indoor Units

40GVM Indoor Unit Specifications

Indoor Unit Clearances

Outdoor Unit Clearances

System Operating Envelope

Operating Range for 18k-42k 230V Systems

Electrical Data

Outdoor Unit Electrical Specifications

Electrical specifications including voltage, current, MCA, and MOCP for outdoor units.

Indoor Unit Electrical Data

Electrical specifications for indoor units, including power from outdoor unit.

Wiring Guidelines and Requirements

Connection Diagram

Field Wiring Diagram for 18K-42K Models

Diagram illustrating the field wiring connections between indoor and outdoor units.

Wiring Diagrams

38GVM 18k Wiring Diagram

Detailed wiring diagram for the 38GVM 18k model, including component labels.

Wiring Diagrams Continued

38GVM 24k Wiring Diagram

38GVM 30k Wiring Diagram

38GVM 36k Wiring Diagram

38GVM 42k Wiring Diagram

Refrigeration System Diagrams

Refrigeration Diagram for 18k-30k Models

Diagram illustrating the refrigeration system flow for 18k-30k models.

Refrigeration System Diagrams Continued

Refrigeration Diagram for 36k-42k Models

Diagram illustrating the refrigeration system flow for 36k-42k models.

System Evacuation and Charging

Deep Vacuum Evacuation Procedure

Procedure for evacuating the system using a deep vacuum method.

Triple Evacuation Method

Procedure for evacuating the system using the triple evacuation method.

Function and Controls Continued

Troubleshooting Introduction

General Troubleshooting Precautions

Electrical Shock Hazard Warning

Warning about electrical shock hazard due to capacitors.

Trouble Diagnosis Procedure

Procedure for diagnosing troubles, including error codes and system checks.

Troubleshooting Common Issues

Basic Troubleshooting Guide

Guide for troubleshooting common problems like odor, water noise, mist, and remote control issues.

Troubleshooting Diagnostic Codes

Diagnostic Codes for 18k, 24k, 30k Models

Diagnostic codes for 18k, 24k, and 30k models and their corresponding error descriptions.

Diagnostic Codes for 36k, 42k Models

Diagnostic codes for 36k and 42k models and their corresponding error descriptions.

Troubleshooting Error Code Details

Sensor Malfunction Error Codes

Error codes for sensor malfunctions in units A, B, C, D, and E.

Troubleshooting Malfunction Indicators

LED Indicator Malfunction Codes

Explanation of LED indicators for various malfunctions and their status (on, off, blink).

Troubleshooting Malfunction Checking

IPM Protection Malfunction Check

Checks for IPM protection malfunction, including voltage, connections, and heat exchangers.

Troubleshooting Compressor Issues

Compressor Wiring and Resistance Check

Flowchart for diagnosing compressor wiring connection and winding resistance issues.

Troubleshooting PFC Protection

PFC Protection Malfunction Flowchart

Flowchart for diagnosing PFC protection malfunctions related to power supply and reactor.

Troubleshooting Capacity Charging

Capacity Charging Malfunction Flowchart

Flowchart for diagnosing capacity charging malfunctions related to capacitor voltage and reactor.

Troubleshooting Overload Conditions

Anti-High Temp/Overload Malfunction Flowchart

Flowchart for diagnosing anti-high temperature and overload malfunctions.

Troubleshooting Sensor Issues

Temperature Sensor Malfunction Flowchart

Flowchart for diagnosing temperature sensor malfunctions and wiring.

Troubleshooting Start Failures

Start Failure Malfunction Flowchart

Flowchart for diagnosing start failure malfunctions related to compressor and refrigerant charge.

Troubleshooting Communication Malfunctions

Partial Communication Malfunction Flowchart

Flowchart for diagnosing communication malfunctions affecting some indoor units.

All Units Communication Malfunction Flowchart

Flowchart for diagnosing communication malfunctions affecting all indoor units.

Troubleshooting Compressor Protection

Compressor Overload/Discharge Protection Flowchart

Flowchart for diagnosing compressor overload and discharge protection malfunctions.

Troubleshooting Compressor Desynchronization

Compressor Desynchronizing Malfunction Flowchart

Flowchart for diagnosing compressor desynchronizing malfunctions.

Troubleshooting Appendices

Ambient Temperature Sensor Resistance Table (15K)

Tube Temperature Sensor Resistance Table (20K)

Outdoor Discharge Temp Sensor Resistance Table (50K)

Outdoor Unit Removal Procedure (18K)

Disassembly Steps 2-3

Disassembly Steps 4-5

Disassembly Steps 6-8

Disassembly Steps 9-11

Disassembly Steps 12-13

Outdoor Unit Removal Procedure (24K/30K)

Disassembly Steps 1

Disassembly Steps 8-10

Disassembly Steps 11-13

Disassembly Steps 14-16

Disassembly Steps 17-19

Outdoor Unit Removal Procedure (36K)

Disassembly Steps 7-9

Disassembly Steps 10-12

Disassembly Steps 13-15

Disassembly Steps 16-18

Outdoor Unit Removal Procedure (42K)

Disassembly Steps 1-3

Disassembly Steps 4-6

Assembly and Compressor Procedures

Compressor Disassembly and Assembly

Compressor Removal and Installation

4-way Valve Disassembly and Assembly

Electronic Expansion Valve Procedures

Vapor Liquid Separator Procedures