HELIX 8200 Operating And Service Instructions page 29

8200 Compressor
Problem
4) Compressor pump
stops after several min-
utes of operating and
then switches ON and
OFF at short intervals.
5) Compressor operates
but cold head motor does
not run.
P/N 8040353
Table B-1: Compressor Troubleshooting Procedures
Possible Cause
1) Intermittent power source
voltage.
1) Loose or defective cable.
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C TI CRYOGENICS
HELIX TECHNOLOGY CORPORATION
Corrective Action
1) Confirm power source voltage
between 198-250V, 60 Hz or 180-
220V, 50 Hz and restore if neces-
sary.
1) Check cold head cable.
B-3