The customer never had a problem again with the system freezing up. I also added a timer switch to the circuit to prevent short cycling of the condenser in case of temperature swings within a five minute period. The blower keeps running until the temperature rises to a certain temperature where I set the switch to close and turn the condenser back on at 50 degrees or so. When the evaporator coil got down to 34 degrees a switch would open and kill the condenser. I positioned the temperature probe on the evaporator coil and set it for 34 degrees. I have seen the problem you are experiencing and my fix for the customer was to add a temperature switch on the evaporator coil.
Ecm air conditioning plus#
What about damage to psc motors? Are the motors specifically designed to rotate at various voltages in order to avoid burned windings? No, PSC motors are designed to run at a set voltage with a tolerance of (typically) plus or minus 10%. Sometimes they cause serious issues in electrical components.
It will likely be obvious, but sometimes it is not, but insects love control panels. However, make sure nothing out of the ordinary is causing moisture issues such as a lawn sprinkler or anything such as that. Most manufacturers do a pretty good job of protecting the ECM condenser fan motor and control module from moisture. Check for clean condenser coils and possible moisture issues around the motor or control module. With ECM condenser fan motors always check the obvious things first. Never assume they are set properly for the application. If dip switch settings are used, double-check the dip switches. An exact replacement is always the best replacement for any electrical part. Using the wrong control module will cause serious issues or cause the motor not to run efficiently as designed. If replacing the old control module with a new module, always make sure you are using an exact replacement from the manufacturer. Electronic devices such as the ECM control module, especially electronic devices that convert AC to DC and the DC power are susceptible to grounding issues. Check back to the breaker panel if necessary to make sure everything is properly grounded. Always make sure the unit is properly grounded. The ECM control module and the motor are sensitive to power issues. Always make sure you have the properly rated voltage for the main power. Following the manufacturer’s service bulletins is difficult even for the best technicians (inside joke for someone I know))). Things change, and you need to make yourself aware of the changes. That means reading the instructions even if you have done it before. Always follow the manufacturer’s instructions. Of course, safety first! Make sure you disconnect the power before working with the control module or the ECM motor. Things such as head pressure and the outdoor ambient temperature along with run-time of the condenser.ĮCM Motor and Control Module Variable Speed ECM Condenser Fan Motors - Additional Tips The parameters for the program are likely based on several different things. This is done for the particular motor for a particular function based on the program inside the control module. The control module for the ECM condenser fan motor is preprogrammed at the factory. The wires from the motor are hooked up to this control module. The ECM condenser fan motor connects to an electronic control module. Variable Speed ECM Condenser Fan Motors - Troubleshooting Tips When the compressor is running at a slower speed, the fan motor will run at a slower speed. So when the compressor is running at a higher speed, the condenser fan motor will also run at high speed. And lower speeds when the system is calling for lower demand. When the system is calling for higher demand, the fan needs to run faster. These motors facilitate a higher speed for the increased demand. Some manufacturers use a standard PSC multi-speed fan motor while others use an ECM fan motor. Since the compressor would stage based on the demand, they needed a condenser fan motor that would also stage based on demand.
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