3. Trouble-Shooting
016-537-B0-002 Rev. B 18
© 2002
TM
3.1 Trouble-Shooting Guide
This guide is designed to cover typical symptoms, causes and solutions for trouble-shooting the
APP SPS. Alpha Technologies recommends that the power supply maintenance log accompany
units brought in for bench service to aid the technician in trouble-shooting the problem.
Symptom #2:
No output to cable; AC line power available; Green “Output Power” indicator ON;And Ammeter
reads "0":
Probable Cause:
AC output breaker has tripped
SPI "ALT/ON" switch in wrong position
"Jones" connector loose or not
connected to SPI
Loose seizure screw inside SPI
Solution:
Reset output breaker
Move switch to "ALT" position
Check connection
Tighten screw
Symptom #1:
No output to cable; No AC line power; Green Output Power indicator OFF:
Probable Cause:
AC line cord unplugged
AC input circuit breaker tripped (or
input fuse open)
Utility power outage
Solution:
Plug in AC line cord
Reset AC circuit breaker
Use voltmeter to verify correct voltage
(120/240 VAC) at receptacle. Connect
generator in the event of an extended power
outage.
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