Honeywell VC4 User Manual page 111

Event
Description
ID
Optics Block Dirty - Cleaning
110
Required
111 Sample Pressure High
112 *Reserved
113 Pump Over Temperature
114 High Exhaust Pressure
115 Power Supply failure
116 Optics Temperature Out of Range
117 *Reserved
118 Filter Timer Expired
119 Optics Cleaning Timer Expired
120 Pump Maintenance Timer Expired
121 *Reserved for LIT option
122 *Reserved for LIT option
123 *Reserved for LIT option
124 *Reserved for LIT option
125 Possible debris in optics block
126 Abnormal Optics reading detected
127 Accelerated Chemcassette™ Usage
Possible Cause
Optic block dirty
Optic block is aged
Tape leader installed improperly
End of line filter clogged
Sample line kinked
Too small ID and/or Maximum line length exceeded
Crimped tube in cable carrier
Fan failure
Line voltage less than 99VAC or higher than 121VAC when high voltage(110VAC) is applied
Line voltage less than 198VAC or higher than 242VAC when low voltage(220VAC) is applied
220VAC module is powered by 110VAC power supply.
110VAC module is powered by 220VAC power supply.
Kinked exhaust
Exhaust tubing length exceeds 50ft. (15m.)
Exhaust line restricted
Power line disconnected
Hot or Cold environment
Electronic problem
Cooling air failure
Maintenance reminder, no malfunction
Maintenance reminder, no malfunction
Maintenance reminder, no malfunction
Debris in optics block
Compensated optic reading automatically. So no further action required. But too frequently
happens, debris in the optic block.
Low level background gas below lower detectable limit
Resolution
Clean optics
Contact Honeywell Service
Replace optics block
Reload Chemcassette™ and recalibrate using leader
Replace end of line filter
Isolate by disconnecting possible crimped sample line
Check sample tube ID and length
Identify crimps in tubing harness by checking pressure with
analyzer closed vs. open
Check fans in pump module
Verify main line voltage
Check the VC4™ module part number and verify main line
voltage
Check exhaust tubing for kinks or restrictions
Reroute to reduce length
Clean Exhaust line
Replace Exhaust line
Check power line from power module to Analyzer
Relocate VC4™
Replace optics block
Replace fans
Change filter and reset timer
Clean the Optics and reset timer
Rebuild pump and reset timer
Clean optics block
Clean optics block
Locate source of background gas