COSA Xentaur COSA 9610 - Manual (Page 39)

INSTALLATION, OPERATION AND MAINTENANCE MANUAL – COSA 9610™
Page 39 of 44
4.4. T
ROUBLESHOOTING
Breakdown -> fault report Test Action
No air pressure ->
flow alarm
tube fracture Replace tube
Measuring pressure behind
reducing valve
Open valve for reducing valve
tagged “air supply”
Increase output pressure
No gas pressure -> flow alarm
Tube fracture Close main valve immediately
and replace pipe
Blockage in gas supply Check/clean/replace tubing
Oven temperature below 750°C ->
temp low alarm
Check set point on temp.
Controller. Check fuse 1 in TB1
of regulated supply
Reset
Check fuse 4 in TB4 of temp.
controller (display is off)
Replace
Check output voltage temp.
controller (0-5 VDC) to Solid
State Relay
Contact supplier
Check pulsating voltage (0-60
VAC) to oven
Contact supplier
Check oven resistance ± 13 !
Contact supplier
Analyzer becomes slow > 20 seconds
response time
Check system flows and gas
pressures
Clean system and/or adjust to
correct values
Check resistance of cell, when
sample gas is “shut off” it should
be lower than 1000 !
Replace Zirconia cell
No response from analyzer Response to mV signal on cell
input terminals Electronic problem. Check
interface board or computer
No mV signal from cell Replace Zirconia cell
Leak in mixing system Check for leaks
Response to mV signal on cell
input terminals
Clean systems and/or adjust to
correct values
No mA output signal Check or the test value is set to
“NO”
Set test value to “NO”
Simulate mA signal wiring.
Check test value on 0%, 25%,
50%, 75% and 100%
Contact supplier