Ericsson 1/KRB 101 1108, Инструкции по установке, эксплуатации и обслуживанию

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© 2001 – Ericsson Amplifier Technologies Inc.
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Figure 8. MCPA Troubleshooting Flow Chart
(Sheet 1 of 2)
Is the
DC ON LED
illuminated?
No
Is the POWER
switch/circuit breaker
tripped or OFF?
Yes
Yes
Reset switch/breaker by
pushing switch firmly down, then
release. If breaker trips again,
contact Ericsson Amplifier
Technologies for assistance, or
return MCPA for service.
BEGIN HERE
No
Is the
ENABLE LED
illuminated?
No
Refer to Figure 5.
Reset MCPA.
If unable to achieve ENABLE mode,
contact Ericsson Amplifier
Technologies for assistance, or
return MCPA for service.
Verify connections and
DC power to MCPA. If secure,
contact Ericsson Amplifier
Technologies for assistance, or
return MCPA for service.
Yes
Attempt to reset fault circuits
by resetting power to the MCPA
as shown in Figure 5. If fault returns,
contact Ericsson Amplifier
Technologies for assistance,
or return MCPA for service.
Is the
FAN ALARM LED
illuminated?
Yes Yes
No
No
Continue to sheet 2
Is there air
flow through both fans
of the MCPA?
Remove obstruction, or replace
fan. Remove 4 screws which secure
it to the rear panel. Disconnect fan
harness connector. Install new
fan in reverse order.
Attempt to reset
fault circuits by resetting power
to the MCPA as shown in Figure 5.
If fault returns, contact Ericsson
Amplifier Technologies for
assistance, or return MCPA
for service.
Is the
LOOP ALARM LED
illuminated?
Yes
No