(2) Remove two screws (1, figure 4-16) and two washers (2).
(3) Unplug and remove relay (3) from socket (4).
Do not exceed voltage required for test. Excessively high voltage may damage
power source or relay.
(1) Make sure power source used for testing is turned off.
(2) Connect 1 amp, 28 VDC power source positive (+) lead to pin X1 on K3 relay (3).
(3) Connect power source negative (-) lead to pin X2 on relay (3).
Hazardous voltages are present when using power source. Do not touch circuitry
or metal on power source or leads on multimeter while power is on. Serious injury
or death by electrocution can result.
(4) Turn power source on.
(5) Set multimeter controls for continuity testing and check continuity from K3 pins A2 to A1, and from pins
B2 to B1.
(6) Turn power source off and check continuity from pins A2 to A3, and from pins B2 to B3.
(7) If multimeter reading is greater than 10 ohms between any pair of test points, replace relay (3).
(8) Disconnect power source from relay (3).
(1) Plug relay (3) into socket (4).
(2) Secure relay (3) to socket (4) with two screws (1) and two washers (2).
(3) Close and latch PDU cover.