Orion System Water Source Heat Pump Module Tulsa - Manual (Page 17)

Technical Guide
Water Source Heat Pump Module
17
Troubleshooting
Using LEDs to Verify Operation
The WSHP Module is equipped with LEDs that can be used to verify
operation and perform troubleshooting. There are LEDs for communi-
cation, operation modes, diagnostic codes, and relays. The Module has
twenty LEDs—one used for power, one used for communications, one
used for operation status, one used for alarms, fi ve used for compressor
relays, four used for Suction Pressure Transducer status, and seven used
for Binary Input status. See Figures 5 and 6 for the LED locations. The
LEDs associated with these inputs and outputs allow you to see what is
active without using a voltmeter.
 Operation Status LEDs
“STATUS” - 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 Mode of
Operation. See Table 8 below for Status Blink Code descriptions. The
blink code descriptions are also located on the Module’s front cover.
See Figure 5 for location.
No. of
Blinks
Status
1 Off Mode
2 Cool Mode
3 Heat Mode
Table 8: STATUS LED Blink Codes
“COMM” - This LED will light up to indicate Communications with
the VCM-X WSHP Controller or SA Controller. If Communications are
established, the COMM LED will blink. You should not see this LED
light up in stand-alone mode, because there would be no communica-
tions with the VCM-X WSHP Controller or SA Controller. See Figure
5 for location.
“ALARM” - This is the diagnostic blink code LED. It will light up and
blink out diagnostic codes. See Table 9 below for Diagnostic Blink
Code descriptions. The blink code descriptions are also located on the
Module’s front cover. See Figure 5 for location.
No. of
Blinks
Status
1 Low Suction Pressure
2 Compressor Lockout
3 Water Flow Failure
4 Low Leaving Water Temp
Table 9: ALARM LED Blink Codes
Figure 5: Operation Status LED Locations