Alpha Technologies CFR Redundant Control Unit - Manual (Page 14)

12
3 Operation
3.1 RCU Start–Up and Test Procedure
If the RCU’s Contactor 1 LED is ON:
Press the Select 2 switch. As the RCU transfers to the Secondary power source the
Contactor 2 LED turns ON.
Press the Select 1 switch to return to primary power.
STEP 5: Test Secondary Contactor
1
Figure 3.5
Test Secondary Contactor
Contactor 1 LED Select 2 Switch
Contactor 2 LED Red Alert LED
2
STEP 6: Turn On The Loads
If the Manual Transfer LED is ON, turn on the load(s).