Goodman R-22 AC SERVICING – ECM CFM ADJUSTMENTS

MBE MOTOR
This section references the operation characteristics of the MBE model motor only. The ECM control board is factory set with the dipswitch #4 in the “ON” position and all other dipswitches are factory set in the “OFF” position. When MBE is used with 2-stage cooling units, dipswitch #4 should be in the “OFF” position.
For most applications, the settings are to be changed according to the electric heat size and the outdoor unit selection. The MBE product uses a General Electric ECMTM motor. This motor provides many features not available on the traditional PSC motor. These features include:
• Improved Efficiency
• Constant CFM
• Soft Start and Stop
• Improved Humidity Control

MOTOR SPEED ADJUSTMENT
Each ECMTM blower motor has been preprogrammed for operation at 4 distinct airflow levels when operating in Cooling/Heat Pump mode or Electric Heat mode. These 4 distinct levels may also be adjusted slightly lower or higher if desired. The adjustment between levels and the trim adjustments are made by changing the dipswitch(s) either to an “OFF” or “ON” position.

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