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REV: 02/17/2021
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21
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Chapter 10: T
ROUBLESHOOTING
G
UIDE
10.1: I
NTELLI
ROL
S
TANDARD AND
C
OMBINATION
P
OWER
S
UPPLIES
Table 4: IntelliROL Standard and Combination Power Supply Troubleshooting Guide
SYMPTOMS
POSSIBLE CAUSES
RECOMMENDED SOLUTIONS
No output from both Class 1
circuits.
No input power
Make sure power supply is
receiving proper input power
Disconnect switch off
Make sure door is closed and
latched. Turn on disconnect
switch.
Input fuse(s) blown (if
applicable)
Check for visible signs as to
cause of blown fuse(s). If all
appears fine, replace fuse(s). If
fuse(s) blows immediately,
replace power supply unit.
Output circuit breakers off or
tripped
If circuit breakers tripped,
resolve cause of tripping. If
circuit breakers are off, turn on
circuit breakers.
Power supply unit faulted, DC
OK light not illuminated.
After resolving any issues
downstream of the power
supply unit, turn off disconnect
switch and wait for power
supply unit to power down.
Turn on disconnect switch to re-
energize power supply unit. If
power supply unit still faulted,
turn off output circuit breakers
and cycle input power with
disconnect switch again. If unit
still faulted, replace power
supply unit.
No output from one Class 1
circuit
Output circuit breaker tripped
or off
If circuit breaker tripped, resolve
cause of tripping. If circuit
breaker is off, turn on circuit
breaker.
Diagnostic Relay open
Issue with power supply unit
Investigate issue with power
supply unit
