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
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PCB PRINTED DIAGRAMS
18
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REFRIGERATION DIAGRAMS
31
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REFRIGERATION LINES
32
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SYSTEM EVACUATION AND CHARGING
33
. . . . . . . . . . . . . . . . .
SEQUENCE OF OPERATION
34
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING FOR THE MAIN FUNCTION
41
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DISASSEMBLY INSTRUCTIONS INDOOR UNIT
56
. . . . . . . . . . .
DISASSEMBLY INSTRUCTIONS OUTDOOR UNIT
62
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APPENDIX 78
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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.
