Carrier 38GVM Series, Service Manual, Page: 1 / 70

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.