Orion System Two Condenser Head Pressure II Module - Manual (Page 15)

Two Condenser Head Pressure II Module Technical Guide
TROUBLESHOOTING
15
Figure 6: LED Locations
LED Diagnostics

 Module LEDs
“R1” - This LED will light up whenever Condenser A Enable Relay is
enabled and will stay lit as long as the relay is active.
“R2” - This LED will light up when the Reversing Valve A Enable Relay
is enabled and will stay lit as long as the Reversing Valve A is active.
“R3” - This LED will light up whenever Condenser B Enable Relay is
enabled and will stay lit as long as the relay is active.
“R4” - This LED will light up when the Reversing Valve B Enable Relay
is enabled and will stay lit as long as the Reversing Valve B is active.
LED Diagnostics
“PWR” LED: When the Two Condenser Head Pressure II 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 or SA series controller is powered. If after
making all these checks, the PWR LED does not light up, the module
is probably defective.
“COMM” LED: When the Two Condenser Head Pressure II 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 or SA 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 or SA series controller is confi gured for Head
Pressure Control and is powered up. 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 II Module contains
no user-serviceable parts. Contact qualifi ed technical
personnel if your module is not operating correctly.