Table 3–9 (Cont.) Key to Figure 3–4, Power Module Controls and Indicators
Item
Control/Indicator
Function
Repair Action
5
DC3 OK
When on, indicates that the
output voltages are within
the specified tolerances.
6
AC Present
When on, indicates ac power
is present at the ac input
connector, regardless of the
position of the circuit breaker.
If ac power is present,
check the power source and
power cord.
If the system will not
power on, and the ac LED
is the only LED on, check
the circuit breaker.
7
DC5 Failure
When on, indicates that
one of the output voltages
is not within the specified
tolerances.
Replace the dc converter.
See Chapter 5.
8
DC5 OK
When on, indicates that the
output voltages are within
the specified tolerances.
9
PSC Failure
When on, indicates a PSC
fault.
Replace the PSC. See
Chapter 5.
10
PSC OK
When blinking, indicates the
PSC is performing power-on
self-tests.
When on, indicates the PSC
is functioning.
11
Over Temperature
Shutdown
When on, indicates that
the PSC shut down the
system because of an internal
overtemperature condition.
Set the circuit breaker
to off and wait 1 minute
before turning system
power on.
Make sure the air intake
is unobstructed and that
the room temperature does
not exceed the maximum
requirement.
12
Fan Failure
When on, indicates a fan
failure. Use the hexadecimal
number in the Fault ID
Display to isolate the fan.
Replace the fan. See
Chapter 5.
13
Disk Drive Power
Failure
When on, indicates a disk
drive power failure. Use the
hexadecimal number in the
Fault ID Display to isolate
the storage compartment that
houses the disk drive.
The faulty unit is probably
the local disk converter
(LDC). To isolate the LDC,
disconnect the drives on
the specified bus, and turn
on system power.
If the indicator stays
on with the drives
disconnected, replace the
failing LDC. See Chapter 5.
A cable or drive may also
be at fault.
(continued on next page)
3–14 System Maintenance