How to troubleshoot a Bosch Greensource TW061 Heat Pump that does not run?
If your Bosch Heat Pump isn't running, first ensure the power supply is on by closing the disconnect. If that doesn't work, check for a blown fuse or tripped breaker and replace or reset it, making sure fuses are the correct size. Finally, verify the voltage supply; if it's below the minimum specified on the unit's data plate, contact your local power company.
What to do if my Bosch Greensource TW061 turns off due to high-pressure control?
If your Bosch Heat Pump shuts off due to high pressure, the discharge pressure might be too high. If in cooling mode, check for lack of water flow, excessively warm entering water temperature, or a scaled/plugged condenser. If in heating mode, check for inadequate load side fluid flow. Also, the unit might be overcharged with refrigerant, in which case you should reclaim refrigerant, evacuate, and recharge to the factory-recommended level. Check the high-pressure switch for defects or improper calibration. Furthermore, if your unit uses a UMC and a 40°F freeze sensor, this sensor being in series with the HP switch can register as a high-pressure fault.
What causes a Bosch Heat Pump to turn off due to low-pressure control?
If your Bosch Heat Pump shuts off due to low pressure, the suction pressure might be too low. If in cooling mode, check for inadequate source-side fluid flow or excessively cold entering water temperature. If in heating mode, check for inadequate water flow, excessively cold entering water temperature, or a scaled/plugged condenser. Also, the unit might be low on refrigerant; check for leaks, repair them, evacuate, and recharge to the factory-recommended level. Inspect the low-pressure switch for defects or improper calibration. If your unit uses a UMC and the DPS option, this sensor being in series with the LP switch can register as a low-pressure fault.
How to fix no flow or low flow in my Bosch Heat Pump?
If your Bosch Heat Pump has no or low flow, check the power supply and ensure the on/off switch is in the 'ON' position. Engage the heat pump contactor and inspect for broken or loose wires, repairing or tightening them as needed. Purge any air from the piping system. Remove the pump cartridge and clean it if the pump shaft/impeller is stuck. If the pump is defective, replace it. Finally, repair any kinks in the water piping and ensure it's the proper size.
Why does my Bosch Heat Pump keep short cycling?
If your Bosch Heat Pump is short cycling, first recalculate the heating and cooling loads to ensure the unit isn't oversized. If the thermostat is near a supply air grill, relocate it and adjust the heat anticipator. Check the wiring and controls, looking for a defective or improperly calibrated low-pressure switch.
Details safety devices and the Unit Protection Module (UPM).
Lists essential checks after installation before unit energization.
Step-by-step guide for initiating the heat pump's operation in cooling and heating modes.
Details the factory-installed HRP for domestic hot water heating using waste heat.
Details heating, cooling, auto-changeover modes, and unit protection mechanisms.
Guides on using the interface, setting up, and managing operations like lockout and pump cycling.
Steps to configure the controller's settings after power-up.
Explains various display fields for configuring temperature scale, pump mode, and compressor settings.
Lists problems, possible causes, and checks/corrections for unit malfunctions.
Lists problems, causes, and checks for Heat Recovery Package (HRP) issues.
Explains common causes of unit shutdowns and lockout conditions.
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