Carrier Aquazone 50RHE 006 User Manual

Carrier Aquazone 50RHE 006

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Carrier is participating in

the Eurovent Certification

Programme. Products are

as listed in the Eurovent

Directory of Certified

Products.

50RHE 006-060

Water-Source Heat Pumps -

Horizontal Units

Installation, Operation and Maintenance Instructions

TM

Table of Contents

Questions and Answers:

D
Dalton SanchezAug 18, 2025
Why is my Carrier Aquazone 50RHE 006 Heat Pump insufficient capacity/not cooling or heating properly?
- J
  Joseph OnealAug 18, 2025
  Several factors can cause insufficient capacity or improper cooling/heating in your Carrier Heat Pump. A dirty filter restricts airflow, so replace or clean it. Check for reduced airflow in heating or cooling, inspect fan motor operation, and address any airflow restrictions. High external static can also be a factor. Leaky ductwork can cause temperature differences between the unit and registers, indicating leaks. Low refrigerant charge or a restricted metering device can also be culprits. Other potential causes include a defective reversing valve, an improperly located thermostat, scaling in the water heat exchanger. Also recheck loads and sizing, loop sizing, loop backfill, ground moisture.
M
mendozaryanAug 21, 2025
What to do if my Carrier Heat Pump has main power problems?
- M
  Michael MarshallAug 21, 2025
  If your Carrier Heat Pump is experiencing main power problems, start by checking the line voltage circuit breaker and disconnect. Then, check for line voltage between L1 and L2 on the contactor. Also, verify that there is 24 V a.c. between R and C on the controller. Finally, check the primary/secondary voltage on the transformer.
S
Suzanne RamirezAug 23, 2025
What to do if my Carrier Aquazone 50RHE 006 Heat Pump shows HP fault - code 2 High pressure?
- X
  xwilliamsAug 23, 2025
  If your Carrier Heat Pump displays a high-pressure fault (code 2), it could be due to several reasons. Check for reduced or no water flow in cooling by inspecting the pump or valve operation/setting and adjust water flow to the proper rate. If the water temperature is out of range in cooling, bring it within design parameters. For heating issues, check for reduced or no airflow by inspecting and cleaning or replacing the air filter. Also, check the fan motor operation and airflow restrictions. Dirty air coil or excessive external static pressure (check Table 4) can also cause this issue.
B
Brandi ColeAug 27, 2025
What to do if my Carrier Aquazone 50RHE 006 has LP/LOC fault - code 3 Low pressure/loss of charge?
- M
  Matthew LiAug 27, 2025
  If your Carrier Heat Pump shows a low pressure/loss of charge fault (code 3), it may be caused by insufficient charge. Check for refrigerant leaks. Also, check the charge and start-up water flow.
J
John ButlerAug 29, 2025
What to do if my Carrier Aquazone 50RHE 006 shows FP1 fault - code 4 Water freeze protection?
- N
  Nicole WoodsAug 30, 2025
  If your Carrier Heat Pump displays a water freeze protection fault (FP1 - code 4), it could be due to several reasons. First, check for reduced or no water flow in heating by inspecting the pump or water valve operation/setting. Also, check if the strainer or filter is plugged and clean or replace it. Make sure to adjust water flow to the proper rate. If the anti-freeze level is inadequate, check the anti-freeze density with a hydrometer. For improper freeze protect settings, clip the JW2 jumper for anti-freeze (-12.2°C) use. If the water temperature is out of range, bring it within design parameters. Finally, a bad thermistor can cause this issue, so check the temperature and impedance correlation.
J
Joseph ValdezSep 1, 2025
What to do if my Carrier Heat Pump shows FP2 fault - code 5 Air coil freeze protection?
- S
  Steven RogersSep 1, 2025
  If your Carrier Heat Pump displays an air coil freeze protection fault (FP2 - code 5), it could be due to several factors. Check for reduced or no airflow in cooling by inspecting the air filter and cleaning or replacing it. Also, check the fan motor operation and airflow restrictions. High external static (check Table 4) can also cause this. If the air temperature is out of range, especially if there is too much cold vent air, bring the entering air temperature within design parameters. For improper freeze protect settings, note that normal airside applications will require -1.1°C only. Finally, a bad thermistor can cause this, so check the temperature and impedance correlation.
T
Todd GutierrezSep 3, 2025
What to do if my Carrier Heat Pump has Condensate fault - code 6?
- K
  kevinmillerSep 4, 2025
  If your Carrier Heat Pump is showing a condensate fault (code 6), there are several things you can check. A blocked drain can cause this, so check for blockage and clean the drain. An improper trap can also be the cause, so check the trap dimensions and location ahead of the vent. Poor drainage can lead to this issue, so check for piping slope away from the unit and the slope of the unit toward the outlet. Also, check vent location for poor venting. Lastly, check for moisture shorting to the air coil.
C
Connor BellSep 6, 2025
What to do if my Carrier Aquazone 50RHE 006 shows Over/under voltage - code 7?
- J
  Juan MurphySep 6, 2025
  If your Carrier Heat Pump displays an over/under voltage fault (code 7), which is auto-resetting, there are several things you can check. If there is an undervoltage, check the power supply and 24 V a.c. voltage before and during operation, as well as the power supply wire size and compressor starting. Also, check the 24 V a.c. and unit transformer tap for correct power supply voltage. If there is an overvoltage, check the power supply voltage and 24 V a.c. before and during operation, and also check the 24 V a.c. and unit transformer tap for correct power supply voltage.
J
Jack RobinsonSep 8, 2025
Why does my Carrier Aquazone 50RHE 006 Heat Pump unit short cycles?
- J
  Joel HoltSep 8, 2025
  Several factors can cause short cycling in your Carrier Heat Pump. A dirty air filter restricts airflow, so check and clean it. If the unit is in ‘Test Mode’, reset power or wait 20 minutes for auto exit. The unit may be oversized for the space, so check sizing for the actual load of the space.
D
dadamsSep 13, 2025
Why my Carrier Aquazone 50RHE 006 only fan runs?
- L
  lindalewisSep 13, 2025
  If only the fan is running on your Carrier Heat Pump, there are a few things to investigate. First, ensure the thermostat is set for heating or cooling operation. The unit may be locked out, so check for lockout codes and reset power. Also, check the compressor overload and replace it if necessary. Finally, check the Y and W wiring at the heat pump. You can jumper Y and R for compressor operation in test mode.

Carrier Aquazone 50RHE 006 Specifications

General

Brand	Carrier
Model	Aquazone 50RHE 006
Category	Heat Pump
Language	English

Summary

Safety Considerations

General Information

Installation Procedures

Jobsite Inspection

Verify unit installation location and surrounding conditions before proceeding.

Unit Inspection Upon Arrival

Inspect unit upon arrival for damage, shortages, and correct model verification.

Optimal Unit Location Selection

Guidelines for selecting an appropriate indoor location for the heat pump unit.

Unit Mounting Guidelines

Proper mounting procedures using factory-installed hangers for safe installation.

Duct System Sizing and Design

Guidelines for sizing ductwork for quiet and efficient airflow.

Condensate Drain Setup

Instructions for proper slope, trapping, and venting of the condensate drain.

Piping Connections

Details on different water-source heat pump piping system types and connection considerations.

Electrical Wiring

Guidelines for safe and compliant electrical connections for the unit.

Low Voltage Wiring

Instructions for connecting thermostats and other low-voltage accessories.

Pre-Start-Up Procedures

System Checkout Checklist

Comprehensive checklist to ensure the unit and system are ready for operation.

Field Selectable Inputs

Complete C Control Jumper Settings

Configuration of jumpers for freeze protection and alarm settings on Complete C control.

Complete C Control DIP Switches

Setting DIP switches for performance monitor, stage 2, and retry options on Complete C control.

Deluxe D Control Jumper Settings

Configuration of jumpers for freeze protection limits on Deluxe D control.

Deluxe D Control DIP Switches

Configuration of DIP switches for accessory relays and operating modes on Deluxe D control.

Deluxe D Accessory Relay Configurations

Details on configuring accessory relay settings for Deluxe D controls.

Water Valve Slow Opening Setup

Configuration for a slow-opening water valve to prevent water hammer.

Outdoor Air Damper (OAD) Setup

Configuration for the outdoor air damper operation.

Unit Start-Up

Operating Limits

Environmental and power supply limits for proper unit operation.

Scroll Compressor Rotation Check

Procedure to verify correct compressor rotation direction for optimal performance.

Start-Up in Cooling Mode

Steps for initiating unit operation in cooling mode and checking performance.

Start-Up in Heating Mode

Steps for initiating unit operation in heating mode and checking performance.

Flow Regulation

Methods for adjusting water flow rate to achieve proper heat exchanger performance.

Piping System Flushing

Procedures for flushing the piping system to remove air and debris.

Anti-Freeze Installation

Guidelines for selecting and calculating anti-freeze for freeze protection.

Cooling Tower/Boiler Systems

Considerations for systems using cooling towers or boilers.

Ground Coupled Systems

Notes on systems using ground coupled or plateframe heat exchangers.

Unit Operation Modes

Power Up Mode

Unit behavior and safety checks upon initial power application.

Aquazone Complete C Control Operation

Operating modes and sequences for units with Complete C control.

Aquazone Deluxe D Control Operation

Operating modes and sequences for units with Deluxe D control.

System Testing

Test Mode Procedure

Procedure to enter and operate the unit in a diagnostic test mode.

Retry Mode Functionality

Control behavior when attempting to recover from input faults.

Deluxe D Control LED Indicators

Interpretation of status, test, and fault LED indicators on the Deluxe D control.

Service and Maintenance

Air Filter Maintenance

Maintenance requirements for air filters to ensure maximum performance.

Water Coil Cleaning

Procedures for cleaning and maintaining the water coil for optimal heat transfer.

Condensate Drain Pan Care

Checking condensate drain pans for algae growth and treatment.

Refrigerant System Checks

Checks for proper refrigerant charge and system integrity.

Condensate Drain Cleaning

Steps for cleaning the condensate drain line and pan.

Air Coil Cleaning

Methods for cleaning the air coil to maintain efficiency.

Condenser Cleaning Procedures

Procedures for cleaning the condenser, especially for scale build-up.

Checking System Charge

Method for verifying the refrigerant charge using temperature and pressure readings.

Refrigerant Charging

Guidelines for safely adding or removing refrigerant to achieve correct charge.

Air Coil Fan Motor Removal

Step-by-step instructions for removing the air coil fan motor.

Troubleshooting Guide

Thermistor Functionality

Information on thermistor function and resistance for troubleshooting.

Control Sensor Checks

Details on control sensors like FP1 and FP2 thermistors for freeze protection.

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