Orion System One Condenser Head Pressure Module - Manual (Page 18)

One Condenser Head Pressure Module
Technical Guide 18
Using LEDs to Verify Operation
The One Condenser Head Pressure Module is equipped with LEDs that
can be used to verify operation and perform troubleshooting. There are
LEDs for communication, operation modes, diagnostic codes, and relays.
The One Condenser Head Pressure Module has eight LEDs—one for
power, one for communications, one for operation status, one for alarms,
two for compressor relays, and two not currently used. See Figure 7 for
the LED locations. The LEDs associated with these inputs and outputs
allow you to see what is active without using a voltmeter.
 Status LEDs
“COMM” - This LED will light up to indicate Communications with the
VCM-X Series Controller or VCM-X -BUS Series Controller. If Com-
munications are established, the COMM LED will blink. You should
not see this LED light up in stand-alone mode, because there would
be no communications with the VCM-X Series Controller or VCM-X
E-BUS Series Controller.
“ALARM” - This is the diagnostic blink code LED. It will light up and
blink out diagnostic codes. See Table 7 below for Diagnostic Blink
Code descriptions. The blink code descriptions are also located on the
Module’s front cover.
No. of
Blinks
Status
0 No Problems
1 No Sensors Detected
2 High Head Pressure Detected
3 Low Head Pressure Detected
Table 7: ALARM LED Blink Codes
“STAT” - This is the status blink code LED. It will light up and fi rst
blink the address of the Module. It will then blink out the quantity of
sensors installed. See Table 8 below for Status Blink Code descriptions.
The blink code descriptions are also located on the Module’s front cover.
No. of
Blinks
Status
Random Blinks Quantity of Sensors
Installed
Table 8: STAT LED Blink Codes
Figure 7: LED Locations
Troubleshooting

 Module LEDs
“R1” - This LED will light up when the Condenser Fan or Water Valve
is enabled and will stay lit as long as the Condenser Fan or Water Valve
is active.
“R2” - This LED will light up when the Heating Enable is enabled and
will stay lit as long as the Heating Enable is active.