Rheem RA1724AJ2CB User Manual

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AIR COOLED

CONDENSING UNITS

92-104921-07-06 (4/18)

Printed in USA

[ ] indicates metric conversions.

Do not destroy this manual.

Please read carefully

and keep in a safe place

for future reference by a

serviceman.

WARNING

THESE INSTRUCTIONS

ARE INTENDED AS AN AID

TO QUALIFIED, LICENSED

SERVICE PERSONNEL FOR

PROPER INSTALLATION,

ADJUSTMENT, AND

OPERATION OF THIS

UNIT. READ THESE

INSTRUCTIONS

THOROUGHLY

BEFORE ATTEMPTING

INSTALLATION OR

OPERATION. FAILURE

TO FOLLOW THESE

INSTRUCTIONS MAY

RESULT IN IMPROPER

INSTALLATION,

ADJUSTMENT, SERVICE,

OR MAINTENANCE

POSSIBLY RESULTING IN

FIRE, ELECTRICAL SHOCK,

PROPERTY DAMAGE,

PERSONAL INJURY, OR

DEATH.

INSTALLATION INSTRUCTIONS

RA17 MODEL SERIES – 17 SEER

WARNING:

RECOGNIZE THIS SYMBOL

AS AN INDICATION OF

IMPORTANT SAFETY

INFORMATION

FEATURING INDUSTRY STANDARD

R-410A REFRIGERANT

Table of Contents

Questions and Answers:

S
smithsabrinaAug 17, 2025
What to do if my Rheem RA1724AJ2CB unit will not run?
- A
  Amy CruzAug 17, 2025
  If your Rheem Heat Pump unit isn't running, several factors could be at play. Start by checking for correct voltage at the line voltage connections in the condensing unit. Also, make sure that the thermostat isn't out of calibration or set too high. Inspect the control board diagnostic codes. Look for blown fuses or tripped breakers and replace/reset them as needed. Check the transformer wiring and replace the transformer if it's defective. Reset the high-pressure control if it's open, and also refer to the high head pressure remedy. Do the same for the low-pressure control. Finally, verify the communication wiring if there's miswiring or the communication light is continuously on.
K
Kimberly PittsAug 20, 2025
Why is my Rheem RA1724AJ2CB compressor short cycling?
- S
  Samantha JohnstonAug 20, 2025
  If your Rheem Heat Pump's compressor is short cycling, it could be due to several reasons. First, check the voltage at the compressor terminals to ensure it's within ±10% of the nameplate marking when the unit is operating. A defective overload protector could also be the culprit, so consider replacing it. Finally, refrigerant undercharge can cause short cycling, so adding refrigerant may solve the issue.
B
brianmillerAug 23, 2025
What causes insufficient cooling in my Rheem RA1724AJ2CB Heat Pump?
- Q
  qhuffAug 23, 2025
  Insufficient cooling in your Rheem Heat Pump can stem from several causes. The unit might be improperly sized, requiring a recalculation of the load. Improper indoor airflow could be the issue; it should be approximately 400 CFM per ton. An incorrect refrigerant charge can also lead to this problem, so charge the unit per the procedure attached to the service panel. Air, non-condensables, or moisture in the system necessitate recovering the refrigerant, evacuating, and recharging, along with adding a filter drier. A bad ID could also be the cause, in which case it should be replaced.
R
Richard CarpenterAug 25, 2025
Why is my Rheem RA1724AJ2CB's outdoor fan running, but the compressor isn't?
- T
  Theresa ShepardAug 26, 2025
  If the outdoor fan is running but the compressor isn't in your Rheem Heat Pump, it could be due to a defective run or start capacitor, which would need replacement. Another possibility is a defective contactor, which should also be replaced. Check for correct voltage at the compressor and ensure all connections are secure. If the compressor is stuck, grounded, has an open motor winding, or an open internal overload, wait at least 3 hours for the overload to reset; if it remains open, replace the compressor. A low-voltage condition might also be the cause, in which case you should add start kit components.
M
mcdanielrobinAug 28, 2025
What causes high head and high or normal vapor pressure in cooling mode on my Rheem RA1724AJ2CB?
- A
  Alexis PhillipsAug 28, 2025
  High head pressure along with high or normal vapor pressure in cooling mode on your Rheem Heat Pump can be attributed to a dirty outdoor coil, which needs cleaning. It could also be due to refrigerant overcharge, requiring a correction of the system charge. If the outdoor fan isn't running, repair or replace it. The issue might also arise from air or non-condensables in the system, necessitating refrigerant recovery, evacuation, and recharge.
S
Sandra WagnerAug 31, 2025
What causes low vapor, cool compressor, and iced indoor coil in my Rheem RA1724AJ2CB?
- J
  Jacob MorrisonAug 31, 2025
  A low vapor pressure, cool compressor, and iced indoor coil in your Rheem Heat Pump can be caused by low indoor airflow. Increase the blower speed or reduce restrictions and replace the air filter. Operating below 65°F outdoors can also cause this issue, so add a Low Ambient Kit. Moisture in the system requires refrigerant recovery, evacuation, recharge, and the addition of a filter drier. Finally, a closed ID circuit necessitates repairing or replacing the ID coil.
D
Dennis FitzpatrickSep 2, 2025
Why do the registers sweat on my Rheem Heat Pump?
- M
  michael19Sep 2, 2025
  Registers sweat on your Rheem Heat Pump due to low indoor airflow. To resolve this, increase the speed of the blower or reduce any restrictions. Also, replace the air filter.
U
urobertsSep 5, 2025
What causes fluctuating head and vapor pressures in my Rheem RA1724AJ2CB?
- C
  challSep 5, 2025
  Fluctuating head and vapor pressures in your Rheem Heat Pump can occur if the = is hunting. Check the thermistor to vapor line connection. Air or non-condensibles in the system can also cause this issue, requiring refrigerant recovery, evacuation, and recharge.
E
Emily BellSep 8, 2025
What causes high vapor pressure in my Rheem RA1724AJ2CB?
- K
  kthomasSep 8, 2025
  High vapor pressure in your Rheem Heat Pump can be caused by an excessive load. Recheck the load calculation. A defective compressor can also be the problem, requiring replacement.

Rheem RA1724AJ2CB Specifications

General

Brand	Rheem
Model	RA1724AJ2CB
Category	Heat Pump
Language	English

Summary

IMPORTANT SAFETY INFORMATION

General Warnings and Precautions

Critical safety warnings and precautions for installation, adjustment, and operation.

ECO-NET ENABLED CONTROL SYSTEM

Eco-Net System Features and Wiring

Overview of EcoNet system features, control board connections, and wiring.

ECO-NET CONTROL OPERATION MODES

Compressor Operation, Timing, and Fan Delays

ACTIVE COMPRESSOR PROTECTION MODES

Pressure Lockouts and Circuit Protection

Protection modes for pressure faults and compressor start circuit issues.

COMPRESSOR PROTECTION AND TEST MODES

Run Circuit Protection and Test Mode Operations

ICC DIAGNOSTIC CODES AND TROUBLESHOOTING

Diagnostic Codes and Troubleshooting Common Symptoms

Explanation of ICC diagnostic codes and general troubleshooting.

ICC CONTROL OPERATION WITH CONVENTIONAL THERMOSTATS

Installation Verification and Compressor Operation Modes

ICC CONTROL OPERATION MODES AND PROTECTION

Timing Delays and Active Protection Reset

Details on timing delays and methods for resetting active protection lockouts.

ELECTRICAL WIRING REQUIREMENTS

Power Wiring, Grounding, and Control Wiring

START-UP PROCEDURES

Initial Start-Up, Airflow, and Refrigerant Charging

Steps for initial start-up, airflow verification, and refrigerant charge adjustment.

EVACUATION AND LEAK TESTING

Evacuation Procedure and Final Leak Testing

The importance of evacuation and steps for final leak testing.

REFRIGERANT CHARGE VERIFICATION

Checking Charge and R-410A Charging Methods

Methods for checking refrigerant charge and specific procedures for R-410A.

REFRIGERANT CHARGING ADJUSTMENTS

Gross Charging by Pressures and Subcooling

Adjusting refrigerant charge using pressures and subcooling for optimal performance.

FINISHING INSTALLATION AND CHARGING

Final Installation Steps and Charging Data

ELECTRICAL DIAGNOSTICS

Electrical Checks Flowchart

A flowchart to systematically diagnose electrical issues.

MECHANICAL DIAGNOSTICS FOR COOLING

Cooling Mechanical Checks Flowchart

A flowchart for diagnosing mechanical problems affecting cooling.

GENERAL TROUBLESHOOTING GUIDE

Troubleshooting Common Symptoms

A chart correlating common symptoms with possible causes and remedies.

SERVICE ANALYZER CHARTS: ELECTRONIC EXPANSION VALVES

Electronic Expansion Valve (EEV) Troubleshooting

Diagnosing and resolving problems with electronic expansion valves.

COOLING MODE TROUBLESHOOTING TIPS

Troubleshooting by System Indicators

Using system indicators like pressure and superheat to diagnose cooling problems.

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