Operation
7-9
“Oil Temp Too Low!" The oil temperature is below the low set point; check cooling water
temperatures, increase ambient temperature if system has been off and
ambient temperature is below 40°F
“Compressor Motor
Current Too Low!”
This occurs when the compressor module motor current is below
threshold while the motor is requested running. Can be caused by an
overheated compressor module.
“You have had 6
errors in less than an
hour: MM:SS”
The compressor is in lockout mode due to more than 6 errors within one
hour; the compressor cannot be started until 30 minutes has elapsed,
and the lockout has been reset using the reset button. MM:SS indicates
minutes : seconds remaining until compressor can be restarted
“3 Phase Power
Improperly Wired!”
The order of the phase power is wrong. Re-wire the input to the
compressor by switching any 2 of the 3 input power wires.
"Power Supply Error!"
Power supply has exhibited a fault, verify voltage output or contact
Cryomech
7.7.6 Warning diagnostics on display screen
Warnings do not cause the compressor to stop and do not prevent the compressor from
starting. If more than one of the warnings below is present, only the highest priority one
will be displayed.
Warning Description Explanation
"High Pressure Running
High!"
High pressure is approaching high set point, if the warning does not
go away after the cold head cools down, verify that static pressures
are correct and all lines are connected completely.
"High Pressure Running
Low!"
High pressure is approaching the low set point; verify static pressure,
check historical data to determine if a leak may have occurred.
“Low Pressure Running
Low!”
Low pressure is approaching the low set point; verify static pressure,
check historical data to determine if a leak may have occurred.
“Low Pressure Running
High!"
Low pressure is approaching the high set point; Flex lines may be
reversed check orientation of lines, verify that the high pressure is
greater than the low pressure
"Delta Pressure Running
High!"
Differential pressure approaching high set point; this condition may
occur on initial startup. Under normal operation it will reduce as the
cold head begins to cool down. If not check static pressure and flex
line connections
"Delta Pressure Running
Low!"
Differential pressure approaching low error set point; flex lines may
be reversed
"Static Pressure Running
High!"
Static pressure approaching high error set point; verify required
static pressure before starting the compressor
"Static Pressure Running
Low!"
Static pressure approaching low error set point; verify required static
pressure before starting the compressor
"Water In Temp Running
High"
Water inlet temperature is approaching high error set point; reduce
inlet water temperature or increase flow rate to prevent overheating
"Water In Temp Running
Low"
Water inlet temperature is approaching low error set point; increase
inlet water temperature or reduce flow rate to prevent overcooling or
overheating caused by reduced oil temperature
“Water Out Temp
Running High!”
Water outlet temperature is approaching high error set point; reduce
inlet water temperature or increase flow rate to prevent overheating
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