KeepRite DLFDHB - User Manual

Specifications subject to change without notice.
DLFCAB / DLCCAR / DLFCHB / DLCCHR
DLFDAB / DLCDAR / DLFDHB / DLCDHR
SERVICE MANUAL
High Wall Ductless Split System − Sizes 09 to 36
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.............................
INTRODUCTION 1.......................................
MODEL / SERIAL NUMBER NOMENCLATURES 2............
DIMENSIONS 3..........................................
CLEARANCES 5.........................................
WIRING 6...............................................
CONNECTION DIAGRAMS 7..............................
WIRING DIAGRAMS 8....................................
PCB PRINTED DIAGRAMS 18.............................
REFRIGERATION DIAGRAMS 31...........................
REFRIGERATION LINES 32................................
SYSTEM EVACUATION AND CHARGING 33.................
SEQUENCE OF OPERATION 34............................
TROUBLESHOOTING 36..................................
TROUBLESHOOTING FOR THE MAIN FUNCTION 41.........
DISASSEMBLY INSTRUCTIONS INDOOR UNIT 56...........
DISASSEMBLY INSTRUCTIONS OUTDOOR UNIT 62.........
APPENDIX 78...........................................
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air−conditioning equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install,
start−up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as
cleaning coils. All other operations should be performed by trained
service personnel.
When working on the equipment, observe precautions in the literature and
on tags, stickers, and labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Keep a
quenching cloth and fire extinguisher nearby when brazing. Use care in
handling, rigging, and setting bulky equipment.
Read this manual 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 the system,
the main electrical disconnect switch must be in the OFF
position. There may be more than 1 disconnect switch.
Lock out and tag switch with a suitable warning label.
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
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.
INTRODUCTION
This service manual provides the necessary information to service,
repair, and maintain the ductless family cooling only and heat pumps.
Section 2 of this manual is an appendix with data required to perform
troubleshooting. Use the Table of Contents to locate a desired topic.

Summary

Safety Considerations

Electrical Shock Hazard

Warning about electrical shock risks during installation or servicing.

Explosion Hazard

Warning against using air or oxygen for leak testing refrigerant compressors.

Clearances

Indoor Unit Clearance

Diagram illustrating required clearances around the indoor unit.

Outdoor Unit Clearance

Diagram and table showing required clearances for the outdoor unit.

Wiring Specifications and Data

Wiring Safety Cautions

Cautions regarding wire sizing, conductor types, and connection integrity.

Electrical Data Tables

Tables detailing running current, power consumption, and circuit ampacity.

Connection Diagrams

115 V Connection Diagram (9 K & 12 K Units)

Wiring diagram for connecting indoor and outdoor units at 115V.

208;230 V Connection Diagram (9 K & 12 K Units)

Wiring diagram for connecting indoor and outdoor units at 208/230V.

208;230 V Connection Diagram (18 K-36 K Units)

Wiring diagram for connecting indoor and outdoor units at 208/230V (18K-36K).

Indoor Unit Wiring Diagrams

DLFCAB;DLFCHB Indoor Unit Wiring

Indoor Unit Sizes 09-12 Wiring Diagram

Indoor Unit Wiring Diagrams (Continued)

Indoor Unit Sizes 18-24 Wiring Diagram

Indoor Unit Sizes 30-36 Wiring Diagram

Outdoor Unit Wiring Diagrams

DLCCAR;DLCCHR 09-12 (115 V) Wiring

DLCCAR;DLCCHR 09-12 (208;230 V) Wiring

Outdoor Unit Wiring Diagrams (Continued)

DLCCAR;DLCCHR Size 18 Wiring Diagram

DLCCAR;DLCCHR Sizes 30-36 Wiring Diagram

DLCCAR;DLCCHR Size 24 Wiring Diagram

DLFDAB;DLFDHB Indoor Unit Wiring

Indoor Unit Wiring Diagrams (DLFDAB;DLFDHB) (Continued)

DLFDAB;DLFDHB Sizes 09-24 Wiring Diagram

DLFDAB;DLFDHB Sizes 30-36 Wiring Diagram

Outdoor Unit Wiring Diagrams (DLCD)

DLCDAR Sizes 09-12 (115 V) Wiring Diagram

DLCDAR Sizes 09-12 (208-230 V) Wiring Diagram

Outdoor Unit Wiring Diagrams (DLCD) (Continued)

DLCDAR Sizes 18-24 Wiring Diagram

DLCDHR Sizes 09-12 Wiring Diagram

DLCDHR Size 30 Wiring Diagram

DLCDHR Sizes 9-12 Wiring Diagram

DLCDHR Size 18-24 Wiring Diagram

DLCDHR Size 36 Wiring Diagram

Refrigeration Diagrams

Refrigeration System Diagrams

System Evacuation and Charging

Unit Damage Hazard Caution

Warning about potential equipment damage from improper vacuum pump use.

System Vacuum and Charge Procedure

Step-by-step guide for evacuating and charging the system using a vacuum pump.

Deep Vacuum Method

Triple Evacuation Method

Final Tubing Check

Sequence of Operation and Interface

Vacuum Pumping and Leak Detection

Procedure for performing vacuum pumping and detecting leaks in the system.

Troubleshooting Introduction

Recommended Troubleshooting Steps

Control Board Measurement Precautions

Safety and procedural notes for taking measurements on control boards.

Troubleshooting Error Codes

Troubleshooting Error Codes (Continued)

Flashing LED Error Codes Table

Continuation of the table detailing error codes, indicators, AC status, and causes.

Main Malfunction Troubleshooting (Indoor Unit)

Temperature Sensor F1, F2 Malfunction

Troubleshooting flowchart for diagnosing temperature sensor issues.

IDU Fan Motor Protection Malfunction (H6)

IDU Fan Motor Blocked Protection Troubleshooting

Flowchart for diagnosing the IDU fan motor blocked protection.

Jumper Cap Protection Malfunction (C5)

Jumper Cap Protection Troubleshooting

Flowchart for diagnosing malfunctions related to jumper cap protection.

Over Current Protection Malfunction (E5)

Over Current Protection Troubleshooting Flowchart

Flowchart to diagnose and resolve over current protection issues.

Communication Malfunction (E6)

Main Detection Points for Communication Malfunction

Key detection points for communication malfunctions.

Communication Malfunction Troubleshooting Flowchart

Flowchart for diagnosing communication circuit malfunctions.

Outdoor Unit Troubleshooting (09 K;12 K)

Capacity Charging Malfunction

Troubleshooting steps for capacity charging malfunctions in outdoor units.

Main Detection Points for Capacity Charging

Key points to check when diagnosing capacity charging issues.

Reactor and PFC Capacitor Check

Reactor and PFC Capacitor Main Detection Points

Key points to check for issues with the reactor and PFC capacitor.

Reactor and PFC Capacitor Fault Diagnosis

Fault diagnosis process for checking reactor and PFC capacitor integrity.

Outdoor Unit Communication Malfunction

Communication Malfunction Detection Points

Key detection points for outdoor unit communication malfunctions.

Communication Malfunction Diagnosis Process

Step-by-step process for diagnosing communication issues.

High Temperature and Overload Protection (E8)

Main Detection Points for High Temp;Overload

Key detection points for high temperature and overload protection.

High Temperature and Overload Troubleshooting

Flowchart for diagnosing high temperature and overload protection faults.

Start-up Failure (LC)

Main Detection Points for Start-up Failure

Key detection points for diagnosing start-up failures.

Start-up Failure Troubleshooting Flowchart

Flowchart for diagnosing and resolving start-up failures.

Overload and High Discharge Temperature Malfunction

Main Detection Points for Overload;Discharge Temp

Key detection points for overload and high discharge temperature issues.

Overload and High Discharge Temp Troubleshooting

Flowchart for diagnosing overload and high discharge temperature malfunctions.

Outdoor Unit Component Troubleshooting

ODU Fan Motor Operation Issues

Troubleshooting steps for ODU fan motor operation problems.

Compressor Operation Issues

Troubleshooting steps for compressor not operating.

Air Conditioner Leakage Issues

Troubleshooting steps for identifying and fixing air conditioner leaks.

Abnormal Sound and Vibration Issues

Troubleshooting steps for abnormal sounds and vibrations.

General Unit Operation Troubleshooting

Unit Startup Failure Troubleshooting

Troubleshooting steps when the air conditioner cannot start up.

Cooling;Heating Performance Issues

Troubleshooting for poor cooling or heating performance.

Component Failure Troubleshooting

ODU Fan Motor Troubleshooting

Troubleshooting steps for ODU fan motor not operating.

Compressor Troubleshooting

Troubleshooting steps for when the compressor cannot operate.

Air Conditioner Leakage Troubleshooting

Troubleshooting steps for air conditioner leaks.

Abnormal Sound and Vibration Troubleshooting

Troubleshooting steps for abnormal sounds and vibrations.

Indoor Unit Disassembly Instructions

Indoor Unit Disassembly Instructions (Continued)

Outdoor Unit Disassembly Instructions (9-12)

Disassembly Safety Warning

Warning to wait 20 minutes after power off and discharge refrigerant.

Outdoor Unit Disassembly Instructions (9-12) (Continued)

Outdoor Unit Disassembly Instructions (18-24)

Outdoor Unit Disassembly Instructions (18-24) (Continued)

Outdoor Unit Disassembly Instructions (30-36)

Disassembly Steps Overview

Disassembly Procedure Visuals

Outdoor Unit Disassembly Instructions (30-36) (Continued)

Continued Disassembly Steps

Further Disassembly Steps

Additional Disassembly Steps

More Disassembly Steps

Final Disassembly Steps

Continued Disassembly Procedure Visuals

Further Disassembly Procedure Visuals

Additional Disassembly Procedure Visuals

More Disassembly Procedure Visuals

Final Disassembly Procedure Visuals

Pipe Expanding Method

Pipe Expanding Safety Note

Pipe Cutting Procedure

Burr Removal Procedure

Insulating Pipe Application

Union Nut Installation

Port Expansion Procedure

Expanded Port Inspection

Temperature Sensor Resistance Tables

Ambient Temperature Sensor Resistance (15 K)

Tube Temperature Sensor Resistance Table (20 K)

Tube Temperature Sensor Resistance Values

Discharge Temperature Sensor Resistance Table (50 K)

Discharge Temperature Sensor Resistance Values

KeepRite DLFDHB Specifications

General

Brand	KeepRite
Model	DLFDHB
Category	Air Conditioner
Language	English