Table B-1: Compressor Troubleshooting Procedures; Appendix B - Troubleshooting Procedures - HELIX 8200 Operating And Service Instructions

8200 Compressor

Appendix B - Troubleshooting Procedures

Problem
1) System power ON/
OFF switch (CB1) and
compressor switch (S1)
remains in the ON posi-
tion when switched on
but the compressor will
not run. Refer to Figure
C-1 for identification of
all electrical components
2) System power ON/
OFF switch (CB1)
remains in the ON posi-
tion, but the compressor
will not run.
P/N 8040353
Disconnect the compressor before performing any troubleshooting pro-
cedures.
The compressor pump is hot after operating. Wait for the pump to cool
down before working on the inside of the compressor

Table B-1: Compressor Troubleshooting Procedures

Possible Cause
1) The thermal protective
switch (TS1) is closed, activat-
ing the relay-trip coil in the ON/
OFF switch (SW1).
2) Incorrect phasing at input
power.
3) Excessive current drain has
activated the series trip in the
compressor ON/OFF switch.
1) No power coming from the
power source.
2) Incorrect or disconnected
wiring within the compressor
WARNING
Corrective Action
1) Test switch (TS1) on air-cooled
compressor; test (TS1) and (TS2)
on water-cooled compressor. If
continuity is found in any switch,
contact the Product Service
Department.
2) Correct phase sequence at
input power cable.
3) Measure and record the current
and contact the Product Service
Department.
1) Check service fuses, circuit
breakers, and wiring associated
with power source, and repair as
needed.
2) Check the compressor against
its electrical schematic, Figure
C-1.
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C TI CRYOGENICS
HELIX TECHNOLOGY CORPORATION
B-1