Carrier Aquazone 50RHE 030 User Manual

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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:

K
Kathleen SwansonAug 18, 2025
Why is my Carrier Aquazone 50RHE 030 Heat Pump insufficient capacity/not cooling or heating properly?
- M
  morrisjeffAug 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
Matthew HillAug 20, 2025
What to do if my Carrier Aquazone 50RHE 030 Heat Pump has main power problems?
- G
  garyadkinsAug 20, 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.
E
Elizabeth MillerAug 23, 2025
What to do if my Carrier Heat Pump shows HP fault - code 2 High pressure?
- P
  Patrick JamesAug 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.
T
Troy GainesAug 27, 2025
What to do if my Carrier Aquazone 50RHE 030 has LP/LOC fault - code 3 Low pressure/loss of charge?
- J
  Joseph FloresAug 28, 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.
D
David HallAug 30, 2025
What to do if my Carrier Heat Pump shows FP1 fault - code 4 Water freeze protection?
- M
  Michael CoxAug 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.
L
Lindsay MontgomerySep 1, 2025
What to do if my Carrier Aquazone 50RHE 030 Heat Pump shows FP2 fault - code 5 Air coil freeze protection?
- J
  Jason ZhangSep 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.
L
lisakentSep 3, 2025
What to do if my Carrier Aquazone 50RHE 030 Heat Pump has Condensate fault - code 6?
- D
  Dana MortonSep 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
Chad SmithSep 6, 2025
What to do if my Carrier Aquazone 50RHE 030 Heat Pump shows Over/under voltage - code 7?
- S
  sullivanbrianSep 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
Jacqueline MyersSep 8, 2025
Why does my Carrier Aquazone 50RHE 030 Heat Pump unit short cycles?
- H
  hriveraSep 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.
E
evansallisonSep 13, 2025
Why my Carrier Aquazone 50RHE 030 only fan runs?
- M
  Mitchell WilsonSep 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 030 Specifications

General

Model Number	50RHE 030
Category	Heat Pump
Cooling Capacity	8.8 kW
Heating Capacity	10.0 kW
Refrigerant	R410A

Summary

Safety and General Information

General Safety Considerations

Essential safety precautions for handling the equipment.

Installation Procedures

Electrical Wiring

Safety and compliance for electrical wiring installation.

Configuration and Setup

Pre-Start-Up System Checkout

Comprehensive checklist before initial system start-up.

Unit Start-Up Procedures

Operation and Maintenance

System Test and Diagnostics

Troubleshooting Common Issues

Diagnosing and resolving common unit faults and problems.

Start-Up Checklist

Pre-Start-Up Verification

Checklist for verifying installation before initial power-up.

Start-Up Operational Checks

Verifying fan operation and compressor rotation during start-up.

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