IN0016 Revision 12 Part # 004573 – 14 of 22
SP PRO Three Phase
Installation Notes
POWER PERFORMANCE PASSION
Verifying Phase Settings
The phase settings can be verified on each SP PRO by observing the blue LED on top of the
E-N disconnect switch inside the SP PRO. For standard single phase systems this LED flashes at
a rate of one flash repeated every one second.
For a three phase system L1 flashes at a rate of one flash repeated every two seconds, L2
flashes at a rate of two rapid flashes repeated every two seconds and L3, the LED flashes at a
rate of three rapid flashes repeated every two seconds.
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