Instruction Manual
IM-105-4000, Rev 1.3
October 2008
OPM 4000
8-2
Air Flow Switch
If an airflow alarm occurs when the system is powered, check the airflow
switch. With the blower running and the source under normal conditions,
disconnect the leads of the switch and place an ohmmeter across them. The
switch should be closed, less than 2 ohms, if flow is enough to over-come
stack pressure and blower inlet is clear. Cover the air cleaner inlet and verify
the switch opens. Replace the leads when the test is complete.
Problem
Possible Cause
Remedy
No stack power fault message.
Service module lost power or
failed
Check power, check SM fuse.
Replace as needed. Refer to
"Service Module Fuse
Replacement" in Section 7:
Maintenance.
Maintenance Mode message.
Maintenance switch or
maintenance function is on
Return all to operate or
neutral positions and press
ACK key to clear alarms.
Control unit zero/span key
was pressed
Service module zero/operate
switch in zero, span/operate
switch in span
Service module test/operate
switch in test
Control unit blank.
Control unit fuse open
Replace and check for shorts
in the power supply or
individual boards.
Summary of Contents for Rosemount Analytical OPM 4000
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Page 10: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 TOC 4 ...
Page 14: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 iv ...
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Page 52: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 4 6 ...
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Page 100: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 A 24 ...
Page 102: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 B 2 ...
Page 104: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 C 2 ...
Page 114: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 OPM 4000 D 10 ...
Page 116: ...Instruction Manual IM 105 4000 Rev 1 3 October 2008 Index 2 OPM 4000 ...