2-20 888-2463-001 3/6/08
WARNING: Disconnect primary power prior to servicing.
Diamond Series™
Section 2 Installation
2.9.4 Control Cabinet LVPS DC Voltage Check
STEP 1 Unplug J7, the DC output of the LVPS assembly in the Control Cabinet.
STEP 2 Activate power supply “A” by turning ON the LVPS A circuit breaker on
the front of the Control Cabinet. Several green LEDs should light on the
LVPS assembly.
STEP 3 Verify the DC voltage on each pin of the jack from which J7 was
removed.
a. Pin 1 GND
b. Pin 2 +7.5VDC
c. Pin 3 +7.5VDC
d. Pin 4 -15VDC
e. Pin 5 +15VDC
f. Pin 6 GND
g. Pin 7 Key
h. Pin 8 GND
STEP 4 Turn OFF the LVPS A circuit breaker and turn ON the LVPS B circuit
breaker.
STEP 5 Verify the DC voltages again on each pin of the same jack.
STEP 6 Turn OFF LVPS B circuit breaker. Wait for the LEDs on the LVPS
assembly to fade out, then reconnect J7.
STEP 7 Turn ON the LVPS A breaker and verify that the green LEDs on the
LVPS assembly are illuminated. If not, turn OFF the breaker
immediately and investigate the problem, otherwise turn ON the LVPS
B breaker also.
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