Installation and Operating Manual

User Manual
040003A010 Rev A Page 18 of 25
4 TROUBLESHOOTING
4.1 INTRODUCTION
This section contains a list of potential problems and suggested actions to be taken. If the
suggested corrective action does not eliminate the problem, please contact the Crescend factory
for further instructions.
NOTE: Do not break the seals on equipment under warranty or the warranty will be null and
void. Do not return equipment for warranty or repair service until obtaining RMA and
proper shipping instructions from the factory.
4.2 TROUBLESHOOTING
Refer to Table 4-1 for troubleshooting suggestions.
Table 4-1 Troubleshooting Guide
PWR ON
EXCITER DRIVE
/ RF DRIVE
OUTPUT POWER
STATUS
PA FAULT
CHECK FAN
HI TEMP
HI VSWR
HI INPUT
LOW OUTPUT
OTHER
SYMPTOMS
POSSIBLE
CAUSE
SUGGESTED
ACTIONS
ON
ON
Full
power
Low
Amplifier is in
transmit mode.
No action is required.
ON
OFF
No
power
Low
Amplifier remains
in standby mode.
Apply RF input signal
to amplifier.
Input power is
below activation
threshold.
Verify exciter signal
level.
ON
High
ON
Low fan speed due
to dirt.
Clean dirt from fans
and vents
Low fan speed due
to aging.
Obtain RMA to have
amplifier checked at
factory.
Fan rotor locked.
Obtain RMA to have
amplifier checked at
factory.
ON
ON
Low or
no
power
High
ON
Input power is
above activation
threshold but lower
than minimum
specified value.
Verify exciter signal
level.
Input signal
frequency is out of
amplifier operation
band.
Verify exciter signal
frequency.