Bosch LV012 User Manual

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Installation and Maintenance Manual

LV MODEL

8733944336 (2016/09)

Table of Contents

Questions and Answers:

S
Steven VillanuevaAug 22, 2025
Why is my Bosch LV012 not shifting into cooling?
- J
  Jeremy EnglishAug 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.
W
wbrownAug 23, 2025
How to reduce objectionable noise levels from my Bosch LV012 Heat Pump?
- L
  lorimitchellAug 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.
R
Rebecca HernandezAug 25, 2025
What to do if my Bosch LV012 Heat Pump compressor isn't running and the fan is on, but I suspect low refrigerant?
- K
  Kathleen BarronAug 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.
S
Sean CallahanAug 26, 2025
What to do if the compressor of my Bosch LV012 Heat Pump doesn't work but the fan runs and there is a freeze fault?
- N
  Nicole HunterAug 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.
T
Travis CoxAug 27, 2025
Why is my Bosch LV012 Heat Pump compressor not running but the fan is, possibly due to high water temperature?
- J
  Jessica LongAug 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.
C
Curtis NelsonAug 29, 2025
How to troubleshoot a Bosch Heat Pump with no compressor operation but running fan, possibly due to a fouled water coil?
- T
  Thomas FisherAug 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.
C
Curtis JamesAug 30, 2025
What to do if my Bosch LV012 compressor isn't running but the fan is, and I suspect airflow issues?
- C
  Courtney CruzAug 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.
J
Jennifer GreenAug 31, 2025
Why is my Bosch LV012 compressor not running but the fan is, possibly due to low airflow?
- D
  Donald WellsAug 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.
B
Bernard MurraySep 2, 2025
What to do if my Bosch LV012 Heat Pump compressor isn't running but the fan is on and I suspect an overloaded control circuit?
- M
  Michael StoneSep 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.
C
Christina NelsonSep 3, 2025
How to troubleshoot a Bosch LV012 with no compressor operation but running fan, possibly due to a bad thermostat connection?
- T
  tmathewsSep 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 LV012 Specifications

General

Brand	Bosch
Model	LV012
Category	Heat Pump
Language	English

Summary

Key to Symbols

Warnings and Symbols

Defines warning keywords and symbols used throughout the manual.

Safety Warnings

General Safety Precautions

Emphasizes reading the manual, proper installation, and qualified personnel.

Installation Guide

Site Prep, Unit Check, and Location

Initial checks, unit inspection, and selecting the installation site.

Mounting, Ducting, and Piping

Electrical Wiring and Controls

Pre-Start-Up and Operation

System Checkout and Limits

Verifying system readiness, operating limits, and starting conditions.

Start-Up Procedures

Fan Motor Options

PSC and ECM Motor Types

Troubleshooting Guide

Compressor and Fan Operation Issues

Diagnosing problems with compressor or fan operation and fault codes.

Airflow, Mode, and Noise Issues

Addressing airflow, mode shifting, humidity, and noise problems.

Technical Data Tables

Wiring Diagrams and Legends

Maintenance and Decommissioning

Maintenance Procedures

Guidelines for filter changes, annual check-ups, and condensate drain maintenance.

Unit Check Out Sheet

Pre-Operation Verification

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