Troubleshooting
C) Run Hours
o Returns display run time (run hours since last service)
o Returns master run time (run hours since manufacture)
D) Return Pressure
o Returns current return pressure in bar and psig
E) Temperatures
o Returns current operating temperatures
F) Adsorber Life
o Returns remaining adsorber life in hours
G) Register New Adsorber
o Resets the adsorber timer function to 30,000 hours (life of a new adsorber)
H) Last 20 Failures
o Returns a list of the last 20 recorded faults. Each line in the list includes:
o An arbitrary index number to show sequence of occurrence (earliest recorded
fault can occur anywhere in the list)
o The name of the recorded fault
o The display run time value at the time of the recorded fault
I) Transmit Data Logs
o Returns data log contents in raw form. Contact SCAI for description of format
of raw data.
Troubleshooting Guide
Blown transformer fuse(s),
FU-1, FU-2 or FU-3
Fault in 200V portion of
PCB 1
Transformer short circuit
Replace PCB 1
Replace transformer.
Blown PCB 1 fuse(s), FU-4,
FU-5 or FU-6
Valve motor short circuit
Cold head cable short
circuit
Solenoid valve fault
Motor contactor fault
PCB 1 fault
Check motor winding resistances;
replace if outside specifications.
Check continuity of each
conductor; replace cable if open.
Replace solenoid.
Check contacts; replace if defective
Replace PCB 1.
Tripped MAIN POWER
circuit protector
Note: See electrical drawing
for specific compressor
model for correct set point.
Wrong load current set
value
Loss of phase/low supply
voltage
Excessive current draw by
compressor capsule
Motor contactor fault
Operation with compressor
capsule return pressure
below atmospheric
pressure
Set to correct value
Check mains voltage; correct if
outside specifications
See above
See above
Check pressure transducer setting.
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