Emerson FB2200 Flow Computer Instruction Manual
D301784X012
March 2019
Service and Troubleshooting 93
5.3 Switch and Buttons
A momentary switch and two push buttons on the HMI module provide troubleshooting options
for the flow computer.
Figure 5-3. Switch and Buttons
EXPLOSION HAZARD: Never open the enclosure in a hazardous location. Opening the enclosure in
a hazardous location could result in an explosion.
Table 5-3. Switch and Buttons
Resets Power. This momentary
switch Interrupts power to the
flow computer to reset it. Used if
system powered on but non-
functional; this attempts a reboot.
Move the SYSTEM RESET switch either
up or down. Unit powers off and then
restarts.
Clears memory (SRAM). The
SRAM memory holds current data
values and pending alarm
messages. If unit has unexpectedly
stopped operating, you can
depress this button on power- up
to clear that information from
memory (hard reset). Try this if a
SYSTEM RESET alone does not
work.
1. Press and hold the A button.
While continuing to hold the A button,
move the SYSTEM RESET switch either
up or down to initiate a reset.
Release the A button. The system clears
SRAM during the power up sequence.