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Bosch Greensource CDi Series - User Manual

Bosch Greensource CDi Series
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Installation, Operation and Maintenance Manual
Greensource CDi Series SM Model
8-733-942-411 (2017/07)
SM024 | SM036 | SM048 | SMO60 | SM070

Table of Contents

Questions and Answers

  • A
    Alexis CollinsSep 18, 2025
    What to do if my Bosch Greensource CDi keeps turning off due to high pressure?
    • K
      Keith GillSep 18, 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.
  • G
    Gregory RodriguezAug 25, 2025
    Why is my Bosch Heat Pump not cooling or heating enough?
    • M
      Michael Terry PhDAug 25, 2025
      There are several potential reasons why your Bosch Heat Pump might not be providing sufficient cooling or heating. It could be due to an undersized unit (in which case, recalculating heating and cooling loads and adding insulation or shading might help), loss of conditioned air through leaks in ductwork or around doors/windows, inadequate airflow (check and replace the filter if dirty), low refrigerant charge, a defective compressor or reversing valve, operating pressures that don't match the unit's pressure/temperature chart, a restricted or defective TXV, or contamination of the refrigerant system with moisture or noncondensables (in which case you need to reclaim refrigerant, replace the filter dryer, evacuate the system, and recharge with the recommended charge).
  • M
    Michael SweeneyAug 25, 2025
    What to do if my Bosch Greensource CDi compressor isn't working?
    • P
      Patty LopezAug 26, 2025
      If the compressor on your Bosch Heat Pump isn't operating but the fan is running, it could be due to an open compressor overload. Check for supply voltage at the load side of the contactor. For 3-phase models, check the phase rotation and voltage at all 3 phases. Poor wiring connections can also cause this; look for signs of heat on the wiring insulation and ensure that all wiring connections are secure and properly torqued. A burned-out compressor is another possibility; check if the compressor hums when power is applied. If not, check the resistance of the compressor windings using the values shown in the compressor characteristics chart, ensuring the compressor is cool (70° F) when checking the windings.
  • J
    Jeremy WebsterAug 28, 2025
    Why does my Bosch Greensource CDi Heat Pump unit shut off on low pressure control?
    • B
      Brad JohnsonAug 29, 2025
      If your Bosch Heat Pump shuts off due to low pressure control, it could be caused by several factors. In cooling mode, this may be due to a lack of or inadequate air flow, entering air temperature being too cold, an inoperative blower, a clogged filter, or restrictions in the duct work. In heating mode, it may be due to a lack of or inadequate water flow, entering water temperature being too cold, or a scaled or plugged condenser. Also, the unit could be low on refrigerant, requiring you to check for a refrigerant leak, repair it, evacuate, and recharge with the factory-recommended charge. Finally, check for a defective or improperly calibrated low-pressure switch.
  • R
    Robert KingSep 22, 2025
    Why does my Bosch Greensource CDi Heat Pump shut off on low pressure control?
    • J
      joshuawareSep 22, 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.
  • M
    Marie SimsDec 1, 2025
    How to troubleshoot entire Bosch Heat Pump unit that does not run?
    • D
      Denise MelendezDec 1, 2025
      If your entire Bosch Heat Pump unit isn't running, first ensure the power supply is on and the disconnect is closed. If that's not the issue, check for a blown fuse and replace it or reset the circuit breaker, making sure you're using the correct fuses. If the voltage supply is too low (below the minimum specified on the unit's data plate), contact your local power company. Finally, the issue may be with the thermostat. Set the fan to 'ON' to see if the fan runs. Then, set the thermostat to 'COOL' with the lowest temperature and then to 'HEAT' with the highest temperature to see if the unit runs in those modes. If the blower and compressor don't run in any of these cases, the thermostat may be miswired or faulty. Check that 24 volts is available on the condensing section's low voltage term...
  • L
    leethomasSep 12, 2025
    What to do if my Bosch Greensource CDi is short cycling?
    • S
      Sheila JordanSep 12, 2025
      If your Bosch Heat Pump is short cycling, several factors could be responsible. The unit might be oversized, requiring a recalculation of heating and cooling loads. The thermostat could be installed near a supply air grill, necessitating relocation, or the heat anticipator may need readjustment. Additionally, check for a defective or improperly calibrated low-pressure switch.
  • R
    Robert MitchellSep 12, 2025
    What to do if my Bosch Heat Pump has no flow or low flow?
    • J
      johnhallSep 12, 2025
      If your Bosch Heat Pump experiences no flow or low flow, here's what you can check: * Verify the power supply. * Ensure the on/off switch is in the 'ON' position. * Engage the heat pump contactor. * Repair or tighten any broken or loose wires. * Purge air from the piping system. * Remove the pump cartridge and clean it if the pump shaft/impeller is stuck. * Replace the pump if it is defective. * Repair any kinks in the water piping and check for proper line size.
  • C
    Chelsea MillerDec 1, 2025
    Why is my Bosch Greensource CDi providing insufficient cooling or heating?
    • M
      Michelle WhitakerDec 1, 2025
      If your Bosch Heat Pump isn't providing enough cooling or heating, several factors could be at play. First, ensure adequate airflow and proper air distribution, and replace any dirty filters. Check for leaks in the ductwork or ambient air entering through doors or windows. If the unit is undersized, recalculate the heating or cooling loads; adding insulation and shading might help. A low refrigerant charge can also cause inefficient operation, so check that. Other potential causes include a defective compressor (check if the discharge is too low and suction pressure is too high), a defective reversing valve, or a restricted or defective TXV. Compare unit operating pressures to the unit's pressure/temperature chart. Lastly, the refrigerant system may be contaminated with moisture or noncond...
  • J
    Jerry BoothSep 4, 2025
    How to fix excessively cold air from Bosch Heat Pump in cooling?
    • R
      Richard BeckerSep 4, 2025
      If your Bosch Heat Pump is producing excessively cold air during cooling or excessively hot air during heating, it could be due to reduced airflow. Try replacing the filter. The fan speed might be too low, so consult the blower performance table and increase fan speed if possible. Also, excessive duct pressure drop can cause this issue; consult the blower performance table and increase fan speed if possible.

Bosch Greensource CDi Series Specifications

General IconGeneral
BrandBosch
ModelGreensource CDi Series
CategoryHeat Pump
LanguageEnglish

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