View any active system faults.
COUNTERS – Number of times each fault has occurred.
SENSORS – View any active sensor faults and their counters
Special operation modes, generally used by the service technician.
Closes the liquid line solenoid while the compressor is running. This traps the
condensed refrigerant in the receiver tank while the compressor draws most
of the remaining refrigerant out of the cold plates. Once the compressor turns
off, a check-valve keeps most of the refrigerant isolated in the receiver and
condenser coil.
PUMP DOWN TO SETPOINT: This pump-down cycle terminates at the Setpoint
for Low Pressure CUT-OUT.
PUMP DOWN TO 2 PSI: This pump-down cycle terminates at 2 psig, which is
the lowest safe pressure for the system.
CANCEL PUMP-DOWN: Used to stop an active pump-down cycle before its
automatic termination.
OPEN VALVE FOR 20 SECONDS: Opens the liquid line solenoid to release
refrigerant out of the receiver and into the expansion valves and cold plates.
Used when resuming normal operation of the system. If this step is not
executed after Pump-Down, the suction pressure may never rise to the
CUT-IN, causing the system to not run, despite the Cold Plates being
warm.
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