Why is there low heat output from my Bosch Greensource CDi?
Low heat output from your Bosch Heat Pump could be due to a scaled or fouled heat exchanger. Clean the heat exchanger to resolve this issue.
Why is the water temperature high in my Bosch Greensource CDi?
High water temperature in your Bosch Heat Pump may be due to a stuck water temperature limit switch or a sensor that is not securely attached to the line.
What to do if my Bosch Heat Pump has no flow or low flow?
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.
What to do if my Bosch Greensource CDi is short cycling?
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.
What to do if my Bosch Greensource CDi unit shuts off due to high pressure?
If your Bosch Heat Pump shuts off on high pressure control, it could be due to several reasons. In cooling mode, it could be due to a lack of or inadequate water flow, entering water temperature being too warm, or a scaled or plugged condenser. In heating mode, it may be caused by a lack of or inadequate air flow, an inoperative blower, a clogged filter, or restrictions in the duct work. The unit might also be overcharged with refrigerant, requiring you to reclaim refrigerant, evacuate, and recharge with the factory-recommended charge. Finally, check for a defective or improperly calibrated high-pressure switch.
How to reduce noise levels from my Bosch Greensource CDi?
If you're experiencing objectionable noise levels from your Bosch Heat Pump, it could be due to several reasons. Air noise might be the issue; ensure the ductwork and grilles are properly sized for the unit's airflow. The fan speed setting could be too high; consult the blower performance table and reduce fan speed if possible. Structure-borne noise can also be a factor; try mounting the unit on a vibration pad. Also, make sure the unit cabinet isn't touching a wall or other building component; adjust the unit's location to prevent contact.
How to stop water hammer in my Bosch Greensource CDi system?
If you're experiencing water hammer with your Bosch Heat Pump, it's likely due to fast-closing valves being installed. Change the valves to a slow-close type to resolve this issue.
Why does Bosch Greensource CDi Heat Pump UPM board show fault in test mode?
If your Bosch Heat Pump operates in test mode but the UPM board shows a fault, it's likely because the UPM board is in test mode. Change the dip switch setting to Normal. This is part of the test mode to ensure that freeze 1 and freeze 2 sensors are correctly located.
Why does my Bosch Greensource CDi Heat Pump have no delay on startup?
If your Bosch Heat Pump operates but has no or short delays on start or restart, the UPM board might be in test mode. To resolve this, change the dip switch setting to Normal.
Why isn't my Bosch Greensource CDi switching between heating and cooling?
If your Bosch Heat Pump isn't shifting between cooling and heating modes, a faulty solenoid could be the cause. Check that the reversing valve solenoid is receiving 24 VAC; if it is, check the resistance of the solenoid, as an open circuit may indicate a burned-out solenoid. A miswired or faulty thermostat could also be the problem; ensure that the reversing valve thermostat wire is connected to the "O" terminal of the thermostat. Finally, check for a loose wire on the "O" terminal, ensuring that the wires from the thermostat to the unit are securely connected, as well as the wires from the electrical box to the reversing valve.
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