Orion System Water Source Heat Pump Module - Manual (Page 18)

Water Source Heat Pump Module
Technical Guide 18
Troubleshooting

 Suction Pressure Transducer LEDs
“PRES 1 & 3” - There are LEDs for two of the Suction Pressure
Transducers. Since each set of two compressors share a sensor, these
LEDs which are located on the top left of the WSHP Module will give
a better indication of which compressor is causing an alarm. See Table
9 for PRES LED status descriptions. See Figure 6 for locations.
No. of
Blinks
Status
Solid On Sensor is Detected and is OK
Solid Off Sensor is Not Detected
1 Low Suction Pressure on this Compressor
2 Compressor is Locked Out
Table 9: PRES LED Blink Codes
Figure 6: PRES 1 & 3 LED Locations
LED Diagnostics
“POWER” LED: When the WSHP Module is powered up, the POWER
LED (located above 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 WSHP Controller is powered (if connected). If after making
all these checks, the POWER LED does not light up, the module is
probably defective.
“COMM” LED: When the WSHP Module is powered up while in Stand
Alone Mode, the COMM LED does not light up. When the module is
connected to the VCM-X WSHP 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 WSHP Controller
is powered. If after making all these checks, the COMM LED does not
light up, the board is probably defective.
“STATUS” LED: As previously described, when the WSHP Module is
fi rst powered up, the STATUS LED will b
link out the Mode of Operation.
“ALARM” LED: As previously described, this LED will blink on and
off to indicate alarms and diagnostics.
NOTE: The WSHP Module contains no user-serviceable parts.
Contact qualifi ed technical personnel if your Module is
not operating correctly.