ETI NETCOM ADH Replacement Procedure page 7

5. Both the RS422 A and B
communications ports, as well as the
Ethernet communications port, all on
the back of the dehydrator, are
actually part of the Main Circuit Board
Assembly from inside the unit. For
that reason, disconnect any cables
which might be connected to any of
these three ports. Refer to Figure 4.
It is not necessary to remove either
the 15-pin Alarm Relay cable or the 9-
pin RS232 communications cable
from the back of the unit.
Figure 4. MAIN CIRCUIT BOARD
ASSEMBLY BACK PANEL COMPONENTS.
6.
For better access to the Main Circuit
Board Assembly
installed in terminal blocks J4, J17,
and J1, it is recommended, on AC
units, to remove the AC Power
Supply Module, as well as the
Compressor (pump) Assembly.
DC units,
Compressor Assembly. Perform the
steps found under each of those
headings below.
South Bend, Indiana USA | networketi.com
Though visible
from the back of
the unit, these
components are
actually part of the
Main Circuit Board
Assembly.
Remove and
replace the board
carefully to avoid
damaging these
or any other
components.
and the leads
On
remove only the
REMOVAL OF THE AC POWER SUPPLY
7. Disconnect the red and black leads
running from the AC power supply
module to terminal block J4. Refer
to Figure
screwdriver, press in on the orange
release tab under the lead then
gently remove the lead. Repeat for
the other lead.
Figure 5. TERMINAL BLOCK J4.
8.
Using a needle nose pliers, carefully
disconnect the three leads (white,
black, and green/yellow) running
from the AC power supply module
to the back of the power filter
module. Refer to Figure 6.
Grasp leads by the
connector end,
not by the wires.
Leads from AC
Power Supply
Module
Figure 6. POWER FILTER MODULE
7
ADH INSTRUCTION MANUAL | PART NO.
MODULE
5. Using a
Leads from AC Power
Supply Module connected
to terminal block J4
TERMINALS.
24097
small
REV B