CM4 Four-Point Continuous Monitor
CM4 Technical Manual
B-4
Fault
No.
Description
Possible Cause
Corrective Action
Relay
Activated
Beeping
Audio
Alarm
Yellow
Status
LEDs
18
Relay xx Fail
Cable problem
Customer I/O relay board
Circuit board
Check cable to customer I/O board
Replace I/O relay board
Replace controller board
FAULT
(RY10)
and
FAULT
(RY8)
On
Solid
19
Overtemp
Pyrolyzer or Optics Block-related
malfunction
Check for dirty air filters
Call Local Service Agent
FAULT
(RY10)
On
Solid
20
Customer I/O 24V Fail
Blown Fuse
Unconnected cable
Replace fuse
Check cable connections
FAULT
(RY10)
On
Solid
21
High Pyro Flow PTx
Sample flow exceeds 200 cc/min
Perform Checking Flow Rates (
)
FAULT
(RY10)
Off
Pulsed
22
Measurement and Control Board Fail Measurement and control board
disconnected
Defective Measurement and Control board
Check Connections to Measurement and Control board
Replace Measurement and Control board
FAULT
(RY10)
On
Solid
23
Optics Shift PTx
Shift in optic light source
Check optics
MAINT
(RY8)
Off
Off
24
Optics Verification Fail PTx
Verification card or Optics dirty
Clean card and repeat Verification Clean Optics (
)
None
Off
Off
25
Pos Pressure PTx
Flow detected with pump off. Possibly
induced by positive pressure at sample
point
Point valve option should be installed
FAULT
(RY10)
On
Solid
Table B-1: CM4 Fault Listings (cont’d)
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