Orion System Two Condenser Head Pressure Module - Manual (Page 19)

Technical Guide
Two Condenser Head Pressure Module
19
Troubleshooting
LED Diagnostics
“PWR” LED: When the Two Condenser Head Pressure Module is
powered up, the PWR LED (located below the address switches) should
light up and stay on continuously. If it does not light up, check to be
sure that the power wiring is connected to the board, the connections
are tight, and the VCM-X series controller is powered. If after making
all these checks, the PWR LED does not light up, the module is prob-
ably defective.
“COMM” LED: When the Two Condenser Head Pressure Module is
powered up while in Stand Alone Mode, the COMM LED does not light
up. When the module is connected to a VCM-X series controller, the
COMM LED should light up, indicating Communications. Each time
Communications are detected, this LED should continuously blink on
and off, for a half second. This LED should never stop checking for a
Communications signal. If it does not light up, check to be sure that the
power wiring is connected to the board, the connections are tight, and
the VCM-X series controller is powered. If after making all these checks,
the COMM LED does not light up, the board is probably defective.
“STAT” LED: As previously described, when the module is fi rst pow-
ered up, the STAT LED will b
link out the number of installed sensors
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
Other Checks
NOTE: The Two Condenser Head Pressure Module contains
no user-serviceable parts. Contact qualifi ed technical
personnel if your module is not operating correctly.