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On-Board FastRegen Control Module Programming and Operation Instructions
P/N 8040406
E-1
C
HELIX TECHNOLOGY CORPORATION
-
TI
CRYOGENICS
Appendix E - On-Board Keypad/Display
Error Messages
Introduction
Appendix E describes the fault messages that can be tested for in the
On-Board Module. Currently, each module must be polled for this
information. The module does not automatically send an error message.
Table E-1: Keypad/Display Error Messages
Error Message
Response
Error Condition
No Pump Power (S3)
Logically AND the response
with 01H
A result means that 1 phase of
power is missing.
Logically AND the response
with 02H
A result means that both phases
of power are missing.
Heater Failure (v)
Logically AND the response
with 04H
Logically AND the response
with 01H
Logically AND the response
with 02H
If TRUE, a heater problem
exists and the pump warm-up
temperature is reduced to 285K.
If TRUE, rough valve
contention exists.
If TRUE, no purge gas was
detected and the warmup
temperature is reduced to 285K.
CRYO TC Gauge inter-
lock (B1)
A response of G or H as the
first letter after the $ in the
response string
Indicates the CRYO TC gauge
cannot be turned ON because
the temperature of the second
stage is above 20K.