Bosch LV036 User Manual (English)

Questions and Answers:

B
Bradley HuberSep 7, 2025
How to troubleshoot a Bosch LV036 with no compressor operation but running fan, possibly due to blocked return air?
- S
  Sherri PhillipsSep 7, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a condensate fault caused by blocked return air. Check the condensate pan for a high water level. Also, check the air filter and return air duct work for blockage, and ensure there is adequate space between the return air opening and any obstructions.
A
Andrea BarnesAug 23, 2025
How to reduce objectionable noise levels from my Bosch LV036 Heat Pump?
- T
  Timothy MunozAug 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.
J
Joshua WilkersonAug 25, 2025
What to do if my Bosch LV036 Heat Pump compressor isn't running and the fan is on, but I suspect low refrigerant?
- C
  Cynthia ThomasAug 25, 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
Sara AliAug 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?
- D
  David KelleyAug 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.
P
parksjulieAug 27, 2025
Why is my Bosch LV036 compressor not running but the fan is, possibly due to high water temperature?
- J
  joseph80Aug 27, 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
Christopher MartinAug 29, 2025
How to troubleshoot a Bosch Heat Pump with no compressor operation but running fan, possibly due to a fouled water coil?
- J
  Julie ChaseAug 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.
A
Aaron HarrisSep 12, 2025
What to do if the compressor is not working but the fan runs on my Bosch Heat Pump, and it might be related to condensate?
- M
  matthewloveSep 12, 2025
  If the compressor of your Bosch Heat Pump isn't working, but the fan is still running, a condensate fault could be the cause. This may be due to poor drainage, so check the condensate pan for a high water level and inspect the drain line for blockages, double trapping, or inadequate trapping. Another cause may be blocked return air, so check the condensate pan for a high water level, check the air filter and return air duct work for blockage, and ensure adequate space between the return air opening and any obstructions.
B
benjaminellisSep 9, 2025
Why is my Bosch Heat Pump causing high humidity?
- M
  Mackenzie JonesSep 9, 2025
  If your Bosch Heat Pump exhibits high humidity, several factors could be the cause. First, high air flow may be the problem; in this case, consult the blower performance table and reduce fan speed if possible. Second, there might be a loss of refrigeration capacity, so check refrigerant pressures with a gauge set. Third, short cycling could be the reason; check unit performance against building load calculations. Finally, a poorly located thermostat can contribute to high humidity; ensure that the thermostat is not located near a supply air duct.
E
Eric BlackSep 6, 2025
Why is my Bosch LV036 Heat Pump compressor not running, but the fan is, possibly due to condensate drainage issues?
- L
  Lauren JohnsonSep 6, 2025
  If your Bosch Heat Pump's compressor isn't running but the fan is, it could be due to a condensate fault caused by poor drainage. Check the condensate pan for a high water level. Check the drain line for blockages, double trapping, or inadequate trapping.
C
Crystal EvansSep 3, 2025
How to troubleshoot a Bosch LV036 Heat Pump with no compressor operation but running fan, possibly due to a bad thermostat connection?
- D
  Donna EllisonSep 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 LV036 Specifications

General

Brand	Bosch
Model	LV036
Category	Heat Pump
Language	English

Summary

Safety Warnings

DANGER: Improper Installation

Warns about hazards from improper installation, adjustment, alteration, service, or use.

WARNING: Installation and Servicing

States that installation/servicing is hazardous and requires trained personnel.

NOTICE: Refrigerant Release Prevention

Emphasizes servicing by qualified technicians to prevent refrigerant release.

NOTICE: Refrigerant Recovery Mandate

Mandates proper recovery of discharged refrigerant per industry and legal standards.

NOTICE: Avoid Equipment Damage During Construction

Advises against using units for construction heating/cooling to prevent damage/warranty void.

Model Nomenclature

Installation

Step 1: Check Job Site

Instructions for preparing the job site before unit installation.

Step 2: Check Unit

Procedures for inspecting the unit upon shipment for damage or discrepancies.

Step 3: Locate the Unit

Guidance on selecting the proper location for unit installation, considering access and environment.

Unit Inspection Checklist

Step 4: Mount the Unit

Hanging Bracket Kit Installation

WARNING: Do Not Reuse Screws

WARNING: Adhere to Hanging Codes

DANGER: Secure Rod Anchoring

Critical safety warning about securely anchoring hanging rods to the ceiling.

Step 5: Check Duct System

Step 6: Install Condensate Drain

Step 7: Pipe Connections

Step 8: Wire Field Power Supply

High Voltage Wiring

Guidelines for wiring high voltage power supply to the unit.

CAUTION: Ground Wire Usage

Critical safety warning about the use of the ground wire.

Low Voltage Wiring

CAUTION: Separate Control and Power Wiring

Safety warning regarding routing control and power wiring.

Step 9: Wire Field Controls

Units Controls ECM-UPM

Details on connecting and configuring the ECM-UPM control system.

ECM Interface Board

Safety Devices and UPM Control

Explains how safety devices integrate with the UPM control board.

UPM Board Features

Freeze Sensor Operation

Pre-Start-Up Procedures

System Checkout Checklist

A checklist of system checks to perform before initial startup.

WARNING: Electrical Panel Safety

Safety warning about high voltage presence in the electrical panel.

Start-Up Procedures

Scroll Compressor Rotation Verification

Instructions for verifying correct compressor rotation direction.

Sequence Of Operation

ECM Control Board Dehumidification Sequence

Unit Start Up Cooling Mode

Unit Start Up Heating Mode

Flow Regulation Methods

System Flushing Procedures

WARNING: Secure Disconnect Before Flushing

Critical safety warning before performing system flushing.

Cooling Tower/Boiler Systems

Geothermal Closed Loop Systems

NOTICE: Specialized Design Knowledge Required

Emphasizes the need for specialized knowledge for closed loop/pond applications.

Open Well Water Systems

Water Quality Importance

NOTICE: Impact of Water Quality on Unit

Critical notice about water quality's impact on unit life and warranty.

Water Quality Table

Condensate Connections

Piping Guidelines

Economizer Operation

Certified Performance Table

Fan Motor Options

Permanent Split Capacitor (PSC) Motors

WARNING: Reuse of Screws

Critical safety warning regarding screw reuse during motor speed adjustment.

WARNING: Hanging Code Compliance

Safety warning to follow codes for unit hanging.

Constant Torque ECM Motors

ECM Motor Speed Tap Adjustment

Describes ECM motors and how to change speed taps.

Constant Torque Blower Motor Data

Constant Airflow ECM Motors

Constant Airflow Motor Performance Table

Standard Blower Motor Data

Standard Blower Motor Electrical Data

Constant Torque ECM Blower Motor Data

Constant Torque ECM Motor Electrical Data

Constant CFM ECM Blower Motor Data

Constant CFM ECM Motor Electrical Data

Troubleshooting Guide

Unit Troubleshooting Overview

Provides a guide to diagnosing and resolving common unit problems.

No Compressor Operation but Fan Runs

Addresses scenarios where the fan runs but the compressor does not engage.

High Pressure Faults

Covers troubleshooting steps for high pressure faults due to water or air flow issues.

Low Pressure Faults

Covers troubleshooting steps for low pressure faults related to refrigerant or water flow.

Freeze Faults Diagnosis

Covers troubleshooting steps for freeze faults related to water temperature or refrigerant.

Troubleshooting Continued

Condensate and Brown Out Faults

Diagnosing issues related to condensate drainage and power supply problems.

Freeze Faults and Airflow Issues

Addressing freeze faults, airflow restrictions, and refrigerant levels.

Thermostat and Wiring Issues

Troubleshooting thermostat calls, connections, and contactor problems.

Troubleshooting Common Issues

Compressor Issues Troubleshooting

Diagnosing compressor overload, wiring, and burnout issues.

No Unit Operation Troubleshooting

Troubleshooting lack of unit operation due to power or transformer issues.

Fan Motor Operation Troubleshooting

Diagnosing fan motor issues for both PSC and ECM types.

Troubleshooting Fan and Mode

Fan Operation and Mode Shifting

Diagnosing fan operation for airflow motors and unit mode shifting issues.

Air Temperature Issues Diagnosis

Troubleshooting causes for incorrect supply air temperatures in cooling and heating.

Troubleshooting Humidity and Noise

Humidity Control Issues Troubleshooting

Noise Troubleshooting Guide

Temperature / Pressure Table

Operating Data Tables

Waterside Pressure Drop Table

Compressor Characteristics

Wiring Diagrams

UPM Status LED Blink Codes

Maintenance Procedures

Routine Maintenance Tasks

NOTICE: Avoid Construction Use

Decommissioning and Environmental Protection

Decommissioning Safety Precautions

Component Recycling and Disposal

Unit Check Out Sheet

Related product manuals

Bosch LV036 User Manual

Table of Contents

Questions and Answers:

Bosch LV036 Specifications

Summary

Safety Warnings

DANGER: Improper Installation

WARNING: Installation and Servicing

NOTICE: Refrigerant Release Prevention

NOTICE: Refrigerant Recovery Mandate

NOTICE: Avoid Equipment Damage During Construction

Model Nomenclature

Installation

Step 1: Check Job Site

Step 2: Check Unit

Step 3: Locate the Unit

Unit Inspection Checklist

Step 4: Mount the Unit

Hanging Bracket Kit Installation

WARNING: Do Not Reuse Screws

WARNING: Adhere to Hanging Codes

DANGER: Secure Rod Anchoring

Step 5: Check Duct System

Step 6: Install Condensate Drain

Step 7: Pipe Connections

Step 8: Wire Field Power Supply

High Voltage Wiring

CAUTION: Ground Wire Usage

Low Voltage Wiring

CAUTION: Separate Control and Power Wiring

Step 9: Wire Field Controls

Units Controls ECM-UPM

ECM Interface Board

Safety Devices and UPM Control

UPM Board Features

Freeze Sensor Operation

Pre-Start-Up Procedures

System Checkout Checklist

WARNING: Electrical Panel Safety

Start-Up Procedures

Scroll Compressor Rotation Verification

Sequence Of Operation

ECM Control Board Dehumidification Sequence

Unit Start Up Cooling Mode

Unit Start Up Heating Mode

Flow Regulation Methods

System Flushing Procedures

WARNING: Secure Disconnect Before Flushing

Cooling Tower/Boiler Systems

Geothermal Closed Loop Systems

NOTICE: Specialized Design Knowledge Required

Open Well Water Systems

Water Quality Importance

NOTICE: Impact of Water Quality on Unit

Water Quality Table

Condensate Connections

Piping Guidelines

Economizer Operation

Certified Performance Table

Fan Motor Options

Permanent Split Capacitor (PSC) Motors

WARNING: Reuse of Screws

WARNING: Hanging Code Compliance

Constant Torque ECM Motors

ECM Motor Speed Tap Adjustment

Constant Torque Blower Motor Data

Constant Airflow ECM Motors

Constant Airflow Motor Performance Table

Standard Blower Motor Data

Standard Blower Motor Electrical Data

Constant Torque ECM Blower Motor Data

Constant Torque ECM Motor Electrical Data

Constant CFM ECM Blower Motor Data

Constant CFM ECM Motor Electrical Data

Troubleshooting Guide

Unit Troubleshooting Overview

No Compressor Operation but Fan Runs

High Pressure Faults

Low Pressure Faults

Freeze Faults Diagnosis