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

Water Source Heat Pump Module
Technical Guide 18
Troubleshooting

 Suction Pressure Transducer LEDs
“PRES 1-4” - There are LEDs for each of the Suction Pressure Trans-
ducers. Since each compressor has 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 10 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 10: PRES 1-4 LED Blink Codes
Figure 6: PRES 1-4 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 or SA 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 or SA 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 or SA 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.