Bosch LV015 User Manual

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Installation and Maintenance Manual

LV MODEL

8733944336 (2016/09)

Table of Contents

Questions and Answers:

R
Robert UnderwoodAug 22, 2025
Why is my Bosch LV015 not shifting into cooling?
- M
  Mr. Jacob MckayAug 22, 2025
  If your Bosch Heat Pump isn't shifting into cooling mode, check that the reversing valve solenoid is receiving 24 VAC. If it is, check the resistance of the solenoid; an open circuit may indicate a burned out solenoid. Also, check that the reversing valve thermostat wire is connected to the 'O' terminal of the thermostat and check for a contact closure between 'O' and 'R'. Finally, check that the wires from the thermostat to the unit are securely connected and that the wires from the electrical box to the reversing valve are connected.
D
Danielle LeeAug 23, 2025
How to reduce objectionable noise levels from my Bosch LV015 Heat Pump?
- R
  Rachel NelsonAug 23, 2025
  If you're experiencing objectionable noise levels from your Bosch Heat Pump, ensure the duct work and grilles are properly sized for unit air flow. If the fan speed setting is too high, consult the blower performance table and reduce fan speed if possible. To address structure borne noise, mount the unit on a vibration pad. Also, install the unit in accordance with the provided instructions and adjust the unit location to prevent it from touching the structure.
N
Nathan FrancisAug 25, 2025
What to do if my Bosch LV015 compressor isn't running and the fan is on, but I suspect low refrigerant?
- P
  Paul HayesAug 26, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a low-pressure fault caused by low refrigerant. Check the refrigerant pressure with a gauge set.
D
Diana GrayAug 27, 2025
What to do if the compressor of my Bosch Heat Pump doesn't work but the fan runs and there is a freeze fault?
- M
  Meghan DiazAug 27, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a freeze fault in the water coil caused by no or low water flow. Check the water valves and/or pumps to ensure they are operating correctly. Also, check the water coil for any blockages.
L
Luis OwensAug 27, 2025
Why is my Bosch Heat Pump compressor not running but the fan is, possibly due to high water temperature?
- C
  caroline40Aug 28, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a high-pressure fault caused by high water temperature. Check the water temperature to ensure it is within the appropriate range.
S
Sharon BrewerAug 29, 2025
How to troubleshoot a Bosch LV015 with no compressor operation but running fan, possibly due to a fouled water coil?
- E
  Erica AtkinsonAug 29, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a high-pressure fault caused by a fouled or scaled water coil. Check for proper flow rate and water temperature, especially looking for a low water side temperature rise during cooling.
B
brian15Aug 30, 2025
What to do if my Bosch LV015 Heat Pump compressor isn't running but the fan is, and I suspect airflow issues?
- L
  Laurie SheaAug 30, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a high-pressure fault caused by no or low airflow. Check the fan motor to ensure it is operating correctly.
D
Daniel HernandezAug 31, 2025
Why is my Bosch Heat Pump compressor not running but the fan is, possibly due to low airflow?
- S
  stephengreenAug 31, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a low-pressure fault caused by no or low airflow. Check the fan motor to ensure it is operating correctly.
S
Susan GuzmanSep 2, 2025
What to do if my Bosch LV015 compressor isn't running but the fan is on and I suspect an overloaded control circuit?
- C
  Cindy BrownSep 2, 2025
  If the compressor of your Bosch Heat Pump is not working, but the fan is running, it might be due to a brown-out fault caused by an overloaded control circuit. Check the control voltage; if it's below 18V, inspect the accessories connected to the unit and ensure they don't exceed the VA draw.
J
Jason JonesSep 3, 2025
How to troubleshoot a Bosch LV015 Heat Pump with no compressor operation but running fan, possibly due to a bad thermostat connection?
- S
  Stephen BryantSep 3, 2025
  If the compressor of your Bosch Heat Pump is not working, but the fan is running, it might be due to a brown-out fault caused by a bad thermostat connection. Check that the thermostat wiring is of the proper gauge and length, is undamaged, and that all connections at the thermostat and heat pump are secure.

Bosch LV015 Specifications

General

Refrigerant	R410A
Cooling Capacity	5.0 kW
Sound Level	45 dB
Heating Capacity	16, 000 BTU/h
Noise Level (Outdoor Unit)	45 dB
Weight (Indoor Unit)	12 kg
Weight (Outdoor Unit)	35 kg
Dimensions (Indoor Unit)	700 x 250 x 190 mm
Dimensions (Outdoor Unit)	780 x 290 x 540 mm

Summary

Safety and Symbol Reference

Safety Warnings

Provides critical safety information before installation and servicing.

Installation - Location and Mounting

Unit Mounting Procedures

Details on how to mount vertical and horizontal units, including vibration pads and pitching.

Installation - Duct System and Condensate Drain

Condensate Drain Installation

Procedures for installing the condensate drain line, including slope and trap requirements.

Installation - Piping and Power Supply

Field Power Supply Wiring

Instructions for wiring the high voltage power supply to the unit according to codes.

Installation - Low Voltage and Control Wiring

Installation - Field Control Wiring

Unit Protection Module (UPM) and Safety

Key Safety Features and UPM Functionality

Lists safety features and UPM board functions like anti-short cycle and freeze protection.

Pre-Start-Up System Checks

Pre-Start-Up System Checkout

Checklist of essential system checks before initial unit startup.

Unit Start-Up Procedures

Cooling and Heating Mode Start-Up

Steps for starting the unit in cooling/heating modes and verifying performance.

Water Quality Management

Unit Troubleshooting Guide

Troubleshooting: No Compressor, Fan Runs

Diagnosing and resolving issues when the compressor doesn't run but the fan does.

Troubleshooting: Freeze Faults

Diagnosing freeze faults related to water flow or low refrigerant.

Troubleshooting Common Issues

Troubleshooting: Condensate, Brown Out, and Air Coil Freeze Faults

Diagnosing issues with condensate, low voltage, brown outs, and air coil freeze faults.

Troubleshooting: Thermostat and Reversing Valve Issues

Addressing thermostat connection problems and reversing valve operation.

Troubleshooting Component Failures

Troubleshooting: Compressor and Power Supply Issues

Diagnosing compressor faults, power supply problems, and control transformer issues.

Troubleshooting: PSC Fan Motor Issues

Diagnosing issues with PSC fan motors, including faulty motors or relays.

Troubleshooting Operational Problems

Troubleshooting: ECM Fan Motor and Cooling Shift Issues

Diagnosing ECM motor faults and problems with the unit not shifting into cooling.

Troubleshooting: Air Temperature and Flow Issues

Troubleshooting Environmental and Noise Issues

Troubleshooting: High Humidity and Noise Levels

Wiring Diagrams

Maintenance and Environmental Protection

Maintenance Procedures

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