Carrier 38MPRAQ09AA3 - User Manual

66 pages

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TABLE OF CONTENTS

PAGE

SAFETY CONSIDERATIONS ....................................................... 1

INTRODUCTION............................................................................1

MODEL NUMBER NOMENCLATURE ....................................... 2

SPECIFICATIONS .......................................................................... 3

DIMENSIONS ................................................................................. 4

CLEARANCES................................................................................ 6

ELECTRICAL DATA ..................................................................... 7

WIRING........................................................................................... 7

CONNECTION DIAGRAM............................................................8

WIRING DIAGRAM....................................................................... 9

FAN AND MOTOR SPECIFICATIONS........................................12

REFRIGERATION CYCLE DIAGRAM........................................12

REFRIGERANT LINES .................................................................. 13

SYSTEM EVACUATION AND CHARGING ............................... 14

OPERATION MODES AND FUNCTIONS ...................................15

TROUBLESHOOTING................................................................... 20

ERROR DIAGNOSIS AND TROUBLESHOOTING WITHOUT

ERROR CODE................................................................................. 22

QUICK MAINTENANCE BY ERROR CODE .............................. 26

TROUBLESHOOTING BY ERROR CODE .................................. 27

DIAGNOSIS AND SOLUTION...................................................... 29

DISASSEMBLY INSTRUCTIONS ................................................ 45

APPENDICES..................................................................................65

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 the 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 the literature and attached to the unit. Consult the 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.

INTRODUCTION

This service manual provides the necessary information to service,

repair, and maintain the indoor 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.



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.

WARNING

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

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.

CAUTION

Service Manual

38MPRA

Outdoor Unit Single Zone Ductless System

Sizes 09 to 24

Questions and Answers:

L
Lisa HortonAug 21, 2025
What to do if my Carrier Air Conditioner unit display is working but will not respond to the remote?
- M
  mmartinezAug 22, 2025
  If the unit display is working but not responding to the remote, the indoor PCB requires replacement.
A
Anthony CoxSep 4, 2025
What to do if there is an outdoor unit EEPROM parameter error in Carrier 38MPRAQ09AA3?
- P
  petersalexSep 4, 2025
  If your Carrier Fan shows an outdoor unit EEPROM parameter error, please refer to page 29 for troubleshooting.
D
Douglas HenrySep 2, 2025
What to do if there is an Occupancy Sensor module error in Carrier 38MPRAQ09AA3 Fan?
- M
  michael65Sep 3, 2025
  For assistance with an occupancy sensor module error in your Carrier Fan, please refer to page 35.
M
Michael SheltonSep 1, 2025
What to do if there is over voltage or over low voltage protection in Carrier Fan?
- L
  Laura SmithSep 1, 2025
  If you are experiencing over voltage or over low voltage protection issues with your Carrier Fan, please refer to page 36 for solutions.
K
Kathleen EstesAug 30, 2025
What to do if there is an inverter compressor drive error in Carrier 38MPRAQ09AA3?
- H
  Hannah StevensAug 31, 2025
  If your Carrier Fan's inverter compressor is showing a drive error, please refer to page 38 for assistance.
C
collierlisaAug 29, 2025
What to do if there is an indoor / outdoor units communication error in Carrier Fan?
- R
  randy97Aug 29, 2025
  If you are experiencing an indoor/outdoor units communication error with your Carrier Fan, please refer to pages 30-31 for troubleshooting steps.
D
Devon SweeneyAug 28, 2025
What to do if there is a communication error between the indoor PCB and display board in Carrier 38MPRAQ09AA3?
- J
  Jeffrey MillerAug 28, 2025
  If you are experiencing communication errors between the indoor PCB and display board of your Carrier Fan, please refer to page 40 for the suggested solution.
A
Abigail GoldenAug 26, 2025
What to do if there is an overload current protection in Carrier Fan?
- J
  Jason WilliamsAug 27, 2025
  If you encounter an overload current protection issue with your Carrier Fan, please refer to page 41 for the suggested solution.
T
Tanner SmithAug 25, 2025
What to do if the outdoor fan speed is operating outside of the normal range in Carrier 38MPRAQ09AA3?
- A
  Autumn WilsonAug 25, 2025
  If the outdoor fan speed of your Carrier Fan is operating outside of the normal range, consult page 32 for guidance.
A
Amy BrownAug 23, 2025
What to do if the indoor fan speed is operating outside of the normal range in Carrier 38MPRAQ09AA3?
- A
  Alison EricksonAug 23, 2025
  If the indoor fan speed of your Carrier Fan is operating outside of the normal range, please see page 33 for troubleshooting steps.