SYMPTOMS Air cooled condenser fan motor run capacitor has failed on a 480v-3ph-60hz (T4) chiller system. This can cause the condenser fan motor to not spin normally and can also cause malfunctions with the optional ICM variable fan speed control. A slow down or stoppage of any condenser fan motor can also cause compressor high […]
PSG – Microprocessor “ERR” issues
SYMPTOMS Persistent PSG microprocessor control “Err” (top screen) with “TSO” or “TSI” showing on bottom screen. This bulletin also covers a “32” (top screen) and “32” (bottom screen) error messages. CAUSE Possible harmonic interference from high voltage power wires being 10 inches (or less) from the back of the microprocessor or the temperature sensor wires. […]