888-2406-002 6-33
WARNING: Disconnect primary power prior to servicing.
Troubleshooting
Table 6-3 Z2 or Z2R Master Controller Related Faults
ABBREVIATION COMMENT ACTION
MSTR_REF +5V reference fault. Indicates +5V reference
is < 4.6V
Mute XMTR (IPA & Exciter, Power
supplies)
REF_WARNING Indicates +5V Reference is out of tolerance
at the Master Controller Board with error of
more than 0.25V but < 0.4V
Reports fault in Log without shutting down
the PAs.
RFL_PWR Reflected power has exceeded VSWR
overload threshold
Will follow 3 Strike Routine (described in
Section 6) Transmitter will mute and try to
slowly ramp power back up to normal.
INTLK External Interlock fault Turn off XMTR, light INTERLOCK LED
FAILSAFE Failsafe fault, AC on and power supply in
standby mode
Mute XMTR, blink INTERLOCK LED
POWER_FAIL AC power supply failed, +20V power supply
on Life Support Board is less than 12V.
Mute XMTR & save fault time. Transmitter
will automatically return to operation when
power returns.
LOW_AIR Low air flow fault at 25% (88 cf/m) Low-fan TO high-fan, OR high-fan TO AC
off
UPS Logic LOW detected at Remote UPS input Transmitter is switched to the UPS
Forward Power setting
CPLR_NC Forward power Directional coupler cable is
not connected
Mute XMTR. Restart required to restore
power
IPA1_MUTE IPA_AB1 current still present with Vg < -15V Mute XMTR (exciter and PAs)
IPA1_LOW IPA_AB1 power is < 30% of calibrated output
with Vg = 0V
Mute, then switch to other IPA
IPA1_OC IPA_AB1 current has exceeded the 14.5A
threshold
Mute, then switch to other IPA
IPA1_TW IPA Temperature Warning, IPA_AB
temperature > 85
o
C
Switch fan to high speed
IPA1_OT
IPA_AB1 temperature has exceeded 100
o
C
Mute, then switch to other IPA
IPA1_OUT IPA_AB1 is not inserted completely into the
connector
Switch to IPA_AB2 if it is not faulted
IPA2_MUTE IPA_AB2 current still present with Vg < -15V Mute XMTR (exciter and PAs)
IPA2_LOW IPA_AB2 power is < 30% of calibrated output
with Vg = 0V
Mute, then switch to other IPA
IPA2_OC IPA_AB2 current has exceeded the 14.5A
threshold
Mute, then switch to other IPA
IPA2_OT
IPA_AB2 temperature has exceeded 100
o
C
Mute, then switch to other IPA
IPA2_OUT IPA_AB2 is not inserted completely into the
connector
Switch to IPA_AB1 if it is not faulted
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