CMC TECHNICAL REFERENCE MANUAL
1X36003 Version 2.52
1996-1999 Ingersoll-Rand Company
Date of Issue: 18-Oct-1999
Troubleshooting Example ___________________________________________________45
Input/Output (I/O) System ___________________________________________________46
Vibration Monitoring System (VMS)_____________________________________________________ 46
Checking Vibration Transmitter Power_______________________________________________ 47
Checking Vibration Circuit ________________________________________________________ 47
Check the Vibration Probe, and Cable_______________________________________________ 48
Checking the Vibration Probe______________________________________________________ 48
Check the BCM _________________________________________________________________ 49
Temperature Monitoring System (TMS) __________________________________________________ 50
Checking for Power to the Temperature Transmitter ____________________________________ 51
Checking for a Faulty RTD ________________________________________________________ 52
Degrees Fahrenheit versus Ohms value chart for 100 OHM Platinum RTD __________________ 53
Degrees Celsius versus Ohms value chart for 100 OHM Platinum RTD ____________________ 54
Checking the RTD Transmitter _____________________________________________________ 55
Checking proper operation of the BCM and wiring______________________________________ 56
Valve Control System (VCS)___________________________________________________________ 57
Checking proper operation of the BCM and wiring______________________________________ 58
Checking proper operation of the I/P and positioner ____________________________________ 59
Pressure Monitoring System (PMS)_____________________________________________________ 60
Checking for Power to the Pressure Transmitter_______________________________________ 61
Checking proper operation of the BCM and wiring______________________________________ 62
Quick check of the PT ___________________________________________________________ 63
Functional PT test_______________________________________________________________ 63
Digital Input System (DIS)_____________________________________________________________ 64
Checking proper operation of the digital devices _______________________________________ 65
Control Power System (CPS) ________________________________________________66
No AC power ___________________________________________________________________ 67
No DC power ___________________________________________________________________ 68
No digital input power ____________________________________________________________ 68
No digital output power ___________________________________________________________ 68
No analog input power____________________________________________________________ 68
No analog output power __________________________________________________________ 68
No OUI power __________________________________________________________________ 68
No CPU power__________________________________________________________________ 69
Controller Problems ________________________________________________________70
BCM Problems______________________________________________________________________ 71
BCM is not controlling____________________________________________________________ 71
OUI Problems_______________________________________________________________________ 71
OUI is dim _____________________________________________________________________ 71
OUI is black____________________________________________________________________ 71
OUI displays “INGERSOLL-RAND Centrifugal Compressor Division”_______________________ 71
UCM Problems______________________________________________________________________ 71
All UCM LED’s are not lit _________________________________________________________ 71
Options ____________________________________________________________ 72
Enclosures________________________________________________________________72
NEMA 12 (IP 64) ____________________________________________________________________ 72
Cooling Fan ________________________________________________________________________ 72
NEMA 4 (IP 65) _____________________________________________________________________ 72
NEMA 4X (IP 65) ____________________________________________________________________ 72
Space Heater _______________________________________________________________________ 73
