Bosch GreenSource SM024

Other manuals for Bosch GreenSource SM024

Installation And Maintenance Manual96 pages

Questions and Answers

C
Caleb LeeAug 21, 2025
How to troubleshoot a Bosch GreenSource SM024 that won't turn on?
- M
  Mark RodgersAug 22, 2025
  If your Bosch Heat Pump isn't running, first ensure the power supply is on and the disconnect is closed. Check for blown fuses and replace them or reset the circuit breaker, ensuring you use the correct fuses. Verify that the voltage supply meets the minimum specified on the unit's data plate; if it's too low, contact your local power company. Also, check the thermostat settings and wiring, setting the fan to 'ON'.
K
Kathryn MuellerAug 25, 2025
Why is my Bosch GreenSource SM024 not heating or cooling sufficiently?
- C
  campbellcarlAug 25, 2025
  If your Bosch Heat Pump isn't providing enough cooling or heating, start by recalculating the heating and cooling loads of your space; adding insulation and shading might help. Check for leaks in ductwork or ambient air entering through doors and windows. Ensure adequate airflow and proper air distribution, replacing dirty filters if needed. A low refrigerant charge could also be the cause. Check the compressor for defects. Also, compare unit operation pressures to the pressure/temperature chart for the unit. Check TXV for possible restriction or defect. The refrigerant system may be contaminated with moisture or noncondensables. Reclaim refrigerant, replace filter dryer, evacuate the refrigerant system, and recharge with factory recommended charge.
W
Wendy RuizAug 29, 2025
Why does my Bosch GreenSource SM024 keep turning off due to high pressure?
- B
  Brittany SolomonAug 30, 2025
  If your Bosch Heat Pump is shutting off due to high pressure, it could be due to: * **High Discharge Pressure:** In cooling mode, this could be caused by a lack of or inadequate water flow, excessively warm entering water temperature, or a scaled/plugged condenser. In heating mode, it could be due to a lack of or inadequate airflow, an inoperative blower, a clogged filter, or restrictions in the ductwork. * **Excessive Refrigerant:** The unit might be overcharged with refrigerant. If so, reclaim the refrigerant, evacuate the system, and recharge it with the factory-recommended amount. * **Faulty High Pressure Switch:** The high-pressure switch may be defective or improperly calibrated. Check the switch.
W
Wanda ShieldsSep 1, 2025
What to do if my Bosch GreenSource SM024 has a condensate overflow?
- D
  David FloresSep 1, 2025
  If your Bosch Heat Pump is showing a condensate overflow, you should clear any blockages in the condensate drain.
M
mhurstSep 3, 2025
What to do if my Bosch GreenSource SM024 experiences a brownout?
- M
  Mr. Eric Simmons Jr.Sep 3, 2025
  If your Bosch Heat Pump experiences a brownout, check the power supply to ensure it is stable.
D
Dale JohnsonSep 5, 2025
What to do if my Bosch GreenSource SM024 keeps turning off due to high pressure?
- R
  Richard CardenasSep 5, 2025
  If your Bosch Heat Pump shuts off due to high pressure, the discharge pressure might be too high. In cooling mode, check for inadequate water flow, excessively warm entering water temperature, or a scaled/plugged condenser. In heating mode, check for insufficient airflow due to an inoperative blower, clogged filter, or ductwork restrictions. Also, the unit may be overcharged with refrigerant. Reclaim refrigerant, evacuate and recharge with factory recommended charge. Finally, inspect the high-pressure switch for defects or improper calibration.
M
michaeldawsonSep 7, 2025
Why does my Bosch GreenSource SM024 shut off on low pressure control?
- L
  lisa73Sep 7, 2025
  If your Bosch Heat Pump shuts down due to low pressure, it could be due to suction pressure being too low. In cooling mode, check for inadequate airflow, excessively cold entering air temperature, an inoperative blower, a clogged filter, or ductwork restrictions. In heating mode, check for insufficient water flow, excessively cold entering water temperature, or a scaled/plugged condenser. The unit might also be low on refrigerant, so check for leaks and repair, evacuate, and recharge with the factory-recommended charge. Also, inspect the low-pressure switch for defects or improper calibration.
J
jonesvictorSep 9, 2025
How to fix no flow or low flow in my Bosch GreenSource SM024?
- S
  Samantha WellsSep 9, 2025
  If your Bosch Heat Pump has no or low flow, verify the power supply and ensure the on/off switch is in the 'ON' position. Engage the heat pump contactor. Check for broken or loose wires, repairing or tightening them as needed. Purge air from the piping system to eliminate air locks. Remove the pump cartridge and clean it if the pump shaft/impeller is stuck. If the pump is defective, replace it. Also, inspect the water piping for kinks or undersized lines, repairing any kinks and ensuring proper line size.
D
Dr. Matthew PotterSep 12, 2025
Why is my Bosch GreenSource SM024 Heat Pump blower running, but the compressor isn't?
- J
  Juan TurnerSep 12, 2025
  If the blower in your Bosch Heat Pump is running but the compressor isn't, check the thermostat wiring, settings, and calibration. Inspect the safety controls for loose or broken wires at the compressor, capacitor, or contactor. If the compressor is cool and the overload won't reset, replace the compressor. If the compressor motor is grounded (internal winding grounded to the compressor shell) or the compressor windings are open (after the compressor has cooled, check continuity), replace the compressor.
V
vrichardSep 12, 2025
Why does my Bosch GreenSource SM024 Heat Pump keep short cycling?
- J
  Jessica NealSep 13, 2025
  If your Bosch Heat Pump is short cycling, it might be oversized; recalculate the heating and cooling loads. The thermostat could be installed near a supply air grill; relocate it. Readjust the heat anticipator. Check for a defective or improperly calibrated low-pressure switch.

Summary

Document Conventions

Key to Symbols

Explains warning symbols and keywords used in the manual.

Safety Warnings

Highlights critical safety precautions and warnings for installation and service.

Model Nomenclature

General Description

Wireless Interface Module (WIM)

Describes the WIM for wireless commissioning and troubleshooting.

Inspecting and Storing the Equipment

Moving and Storage

Guidelines for safely moving and storing the unit.

Unit Installation

Location Selection

Provides guidance on choosing the optimal installation site for the unit.

Blower Configurations

Explains the horizontal unit blower orientation options.

Blower Configurations - Left-Hand Unit Instructions

Blower Configurations - Right-Hand Unit Instructions

Return and Discharge Air Duct Flanges Preparation

Corner Cap Installation Instructions (for HZ Units Only)

Guide for installing corner caps on HZ units.

Mounting Vertical (VT) Units

Mounting Horizontal (HZ) Units

Guidelines for installing horizontal units, including suspension.

Hanging Bracket Kit

Details the installation of the hanging bracket kit for HZ units.

Condensate Drain

Duct System

Instructions for supply and return air duct connections.

Piping

Guidance on supply and return piping connections and materials.

Electrical

Electronic Thermostat Installation

Steps for installing and connecting the electronic thermostat.

Alarm Terminal Wiring

Instructions for wiring the alarm terminals.

Heat Recovery Package (HRP) Setup

Water Tank Preparation

Steps to prepare the water tank for HRP system.

HRP Water Piping

Guidelines for installing HRP water piping.

Specific Application Considerations

Well Water Systems

Considerations for using well water with the heat pump.

Cooling Tower;Boiler Systems

Guidelines for using cooling tower or boiler systems.

Geothermal Systems

Specifics for geothermal system installations.

Post-Installation System Checkout

Unit Start-Up

Procedures for starting up the unit after installation.

Unit Configuration

Bosch EasyStart App

Overview of the Bosch EasyStart app for configuration.

Settings

Details the configurable settings via the Bosch EasyStart app.

System Operation

Timers and Faults

Explains random start-up delay, test mode, and anti-short cycle delay.

Sequence of Operation

Describes the operational sequence for cooling and heating modes.

Reversing Valve Operation

Heat Recovery Package (HRP)

Overview of the HRP components and function.

Dehumidification

Latching Mode Operation

Explains the staging down process in heating/cooling.

System Protection

Pressure Protection

Overview of high and low pressure protection mechanisms.

Low Loop Water Protection Control (LLWPC) (Boilerless Control)

Prevents low loop water during heating operation.

Water Flow Detection

Monitors water flow to prevent issues like freezing.

Return Air Temperature (RAT) Sensor

Discharge Air Temperature (DAT) Sensor

Measures supplied air temp to determine unit state.

Leaving Water Temperature (LWT) Sensor

Coaxial Water Coil Freeze (FZC) Sensor

Detects freezing conditions in the coaxial water coil.

Evaporator Air Coil Freeze (FZE) Sensor

Discharge Refrigerant Temperature (DRT) Sensor

Monitors DRT for HRP operation suitability.

Domestic Water Temperature (DWT) Sensor

Options

Electric Heat

Details internally-mounted supplemental electric heat options.

Smart Start Assist

Accessory to reduce compressor starting current.

Smart Start Assist Specifications

Smart Start Assist Modes of Operations

Explains normal and undervoltage conditions for SSA.

Loop Pump Control (former Pump Valve Relay Kit)

Wireless Interface Module (WIM)

Troubleshooting

HPC LED Status Indicator (Blink Code) Information

Explains HPC LED blink codes for fault diagnosis.

Unit Troubleshooting

NO COMPRESSOR OPERATION BUT FAN RUNS

Diagnosing issues when the fan runs but the compressor does not.

NO COMPRESSOR OR FAN OPERATION

Troubleshooting no compressor or fan operation.

NO FAN OPERATION-ECM CONSTANT AIRFLOW MOTOR

Diagnosing issues with the ECM fan motor.

EXCESSIVELY COLD SUPPLY AIR TEMPERATURE IN COOLING OR EXCESSIVELY HOT SUPPLY AIR TEMPERATURE IN HEATING

Diagnosing incorrect supply air temperatures.

HIGH-PRESSURE FAULT

Diagnosing and resolving high-pressure faults.

LOW-PRESSURE FAULT

Diagnosing and resolving low-pressure faults.

FREEZE COAXIAL FAULT

Troubleshooting coaxial freeze faults.

CONDENSATE OVERFLOW FAULT

Diagnosing condensate overflow faults.

BROWNOUT FAULT

Troubleshooting brownout voltage conditions.

NOT COOLING FAULT

Diagnosing when the unit is not cooling.

NOT HEATING FAULT

Diagnosing when the unit is not heating.

Unit Noise Troubleshooting

OBJECTIONABLE NOISE LEVELS

Addresses air noise, structure-borne noise, and compressor noise.

HRP Troubleshooting

NO FLOW LOW FLOW

Troubleshooting no or low flow conditions for HRP.

Smart Start Assist Troubleshooting

Maintenance

Filter changes or cleaning

Routine filter maintenance schedule.

Annual checkup

Recommends annual inspections by qualified mechanics.

Wiring Diagrams

Thermostat Connections

Alarm Terminal Wiring

Instructions for wiring alarm signals.

Basic Piping Diagram

Dimensional Drawings

Horizontal-Straight-Through Configuration

Provides dimensions for HZ units in straight-through config.

Exploded Views

HZ Unit Exploded View

Exploded view showing components of the HZ unit.

VT Unit Exploded View

Exploded view showing components of the VT unit.

Terminology

Acronyms

Lists and defines common acronyms used in the manual.

Terms

Defines key terms related to HVAC and refrigerants.

Spare Parts List

Wiring Harness

Images and part numbers for various wiring harnesses.

Electrical Box Typical Layout and Spare Parts List

Refrigeration Components

Rev. C HZ

Lists refrigeration components for HZ models.

Rev. C VT

Lists refrigeration components for VT models.

Decommissioning Information

Protecting the Environment

Guidance on environmentally responsible product disposal.

Check-Out Sheet

EasyStart Check-Out Sheet

NOTES