
COMMUNICATION MODULE INSTALLATION
9
POWER UP TEST
1
DO NOT
connect the local Internet service to the CM (communication module) at this time. This
should only be done after all water heating appliances have been connected.
2 Plug the included 5 VDC Power Supply (Table 1 on page 7) into an available 120 VAC wall outlet.
Use a field supplied extension cord, power strip or outlet multiplier as necessary to access an
available 120 VAC socket.
3 Insert the 5 VDC round plug from the Power Supply into the socket labeled “5 VDC” on the front
edge of the CM - see Figure 4.
The CM should now be energized and initiate it’s boot sequence. The CM’s LCD should display a
“Booting iCOMM Please Wait”
message. If the CM is not energized (no text appears on the
LCD) see the Service Note below.
Without a connection to the Internet or any water heating appliances the CM will display the
“No
Units Found”
and/or
“No Network Found”
error messages and activate it’s internal alarm
buzzer. Press the Display Button several times to silence any alarms. The CM boot sequence is
complete at this point - unplug the 5 VDC round plug from the CM.
Proceed to the Leak Detector installation section - see page 10.
Service Note - CM Power Supply Test
If no characters or messages appear on the CM’s LCD when power is applied:
• Ensure the 5 VDC Power Supply is plugged into an available 120 VAC socket.
• Ensure the round plug from the 5 VDC Power Supply is fully inserted into the 5 VDC socket
on the CM - see Figure 4.
• Ensure 120 VAC is present at the outlet the 5 VDC Power Supply (plug in transformer) is
using. Check for 120 VAC at the outlet with an AC volt meter - restore power to the outlet if
120 VAC is not present.
• Ensure the 5 VDC Power Supply is outputting 5 VDC. Using a DC volt meter (Tool
Requirements on page 4) check for DC voltage between the center and outer conductors
of the 5 VDC round plug with the Power Supply plugged in to a 120 VAC outlet. If 5 VDC is
not present - the CM Power Supply must be replaced. If 5 VDC is present call 888 928-
3702 for further technical assistance.
5 VDC
Socket
Front Edge
Figure 4
CM (communication module)