User's Manual

ACT-VHF-III-600PA User Manual
ACT-VHF-III-600PA-USR-DOC-V1.0, 05/29/2019 Page 6 of 26
1 Product Appearance
1.1 Front Panel
 LED_PWR
 Green light will be on when the DC voltage of internal power supply is within the normal range
(48 VDC ~ 52 VDC).
 Green light will flash when the DC voltage of internal power supply is out of the normal range
(48 VDC ~ 52 VDC).
 Green light will be off when the external power supply is turned off, or internal power supply
module does not work.
 LED_RS485
 Green light will flash once per second when the internal communication is normal.
 Green light will stay constantly on or off when the internal communication is abnormal.
 LED_FWD
 Blue light will be on when RF_OUT has power output.
 Blue light will be off when the RF button is turned off, or the PA enters the auto-protection mode
and therefore shuts down its RF output. There are several situations which will result in
auto-protection mode, such as the input power is too high, the reflected power is too high, or the
temperature is too high.
 LED_ALARM
 Red light will be off if there is no alarm.
 Red light will be on if there is any alarm.
Note:
1) The front fan covers can be removed to clean the air intake path. No screw driver is needed, and no
disassembly of the PA is required.
2) When a warning occurs and the PA enters auto-protection mode, the only way to clear this state is to
cycle power on the PA module once the problem(s) is resolved. Otherwise all warning LEDs will
remain on even if the problem(s) no longer exists.