Specifications subject to change without notice.
DLCERA
SERVICE MANUAL
Outdoor Unit Single Zone Ductless System − Sizes 09 to 24
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.............................
INTRODUCTION 1.......................................
MODEL/SERIAL NUMBER NOMENCLATURES 2.............
SPECIFICATIONS 3.......................................
DIMENSIONS 5.........................................
CLEARANCES 8.........................................
ELECTRICAL DATA 9....................................
WIRING 9...............................................
CONNECTION DIAGRAMS 10.............................
WIRING DIAGRAM 10....................................
REFRIGERATION CYCLE DIAGRAMS 14....................
REFRIGERANT LINES 15.................................
SYSTEM EVACUATION AND CHARGING 16.................
ELECTRONIC FUNCTIONS 17.............................
TROUBLESHOOTING 21..................................
OUTDOOR UNIT DIAGNOSTIC GUIDES 22..................
PCB DIAGRAMS 23......................................
DIAGNOSIS AND SOLUTION 25...........................
DISASSEMBLY INSTRUCTIONS 46.........................
APPENDIX 69...........................................
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
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 system, 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 outdoor units. Section 2 of this manual has an appendix
with data required to perform troubleshooting. Use the Table of Contents
to locate a desired topic.
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