Guardian 4389 Diagnostic Repair Manual page 57

SECTION 3.2
OPERATIONAL ANALYSIS
UTILITY RESTORED, TRANSFER SWITCH DE-E E NERGIZED
After the preset time interval expires the circuit board will open the Wire 23 circuit to ground. The transfer relay
de-energizes, it's normally closed contacts close, and utility source voltage is delivered to the utility closing coil
(C1), via Wires N1A and N2A, closed Transfer Relay Contacts 1 and 7, and Limit Switch XA1.
Page 3.2-7
Figure 7. Utility Restored, Transfer Relay De-energized.
V-TYPE PREPACKAGED
PART 3
TRANSFER SWITCHES