11523 - Measure 15 VDC at terminal block 1 (TB1) Measure 15 VDC at terminal block 1 (TB1) Go to 11532 - 11524 - Voltage close to 15 VDC? - Decision, Notes: Step Reference Number 17 Note 9041 - Using a digital multimeter in DC mode,verify 15 VDC at TB1 pins 1, 2, and 3. 9064 - Pins 4, 5, and 6 are associated grounds.