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QMultiFlex-400™ Installation and Operating Handbook
11.6 Unit Faults
Fault Text
Unit fault: One or more
PSU rails are out of range.
Unit fault: Station clock has
failed. Check clock source.
An internal fault has
occurred. Please consult
factory.
Unit fault: Rx backup clock
has failed
Unit fault: Communications
with the BUC have failed.
Check connections.
Unit fault: BUC PLL failure.
Unit fault: BUC over-
temperature failure.
Unit fault: Modulator DPLL
has lost lock.
Unit fault: Tx Synth has
lost lock.
Unit fault: Rx Synth has
lost lock.
Unit fault (occurs initially
as unit warning): Operating
temperature exceeded.
11.7 Unit Warnings
Fault Text
Unit warning: One or more
of the cooling fans have
failed.
Unit warning: One or more
PSU rails are out of range.
Unit warning: Carrier
muted due to power
outage. Acknowledge
power-up to enable.
Unit warning: AUPC at
maximum power offset.
Unit warning: Rental SAF
features %s will expire in
less than 48 hours.
Notes
A PSU line has failed. The unit has a linear supply and
will fail if the mains input is below the specified minimum
level. Check the mains voltage and the internal PCB-
mounted low-voltage fuses.
A valid signal cannot be detected on the external Station
clock input. Check the cable and the clock source.
This indicates that the software has been unable to
initialise the hardware. Power the modem down and back
up to see whether this clears the problem.
The clock used when the selected Rx clock fails has also
failed. Contact technical support for advice.
Unable to communicate with the BUC, check BUC type &
services are correctly configured.
The PLL in the BUC is reporting out of lock. Check
reference clock.
The BUC is indicating an over-temperature fault.
Consult technical support if this alarm cannot be cleared
Consult technical support if this alarm cannot be cleared
Consult technical support if this alarm cannot be cleared
This refers to the internal unit temperature, Check the
modem vent slots are clear and the rear fan has not
failed. This alarm is a warning beyond 60°C and
becomes a fault at 70°C
Notes
One of the PSU on the redundancy switch have failed
The Tx carrier is set to mute after a power failure. The
power has failed and returned. The fault needs to be
acknowledged in order to allow the carrier to be
unmuted.
While attempting to maintain a constant Eb/No at the
distant modem, the AUPC function has adjusted the
modem power level to the maximum offset allowed.
Check AUPC settings.
Indicates that one or more SAF features (such as Paired
Carrier) that have been purchased on a temporary
license are about to expire. A new purchase order should
be raised if the features are still required.
11-5
To
To
Relays
Other
Ter
Sat
RF,
U
TA,TC
TF,
CM
U,D
TF,
U
TA,TC
RF,
CM
U
TA,TC
RF
U
TF
U
TF
U
TF
U
TF,
U
CM
U
TA,TC
RF
TF,RF,
U,D
TA,TC
CM
To
To
Relays
Other
Ter
Sat
D
CM
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