Cosa 9610 - Troubleshooting

INSTALLATION, OPERATION AND MAINTENANCE MANUAL – COSA 9610™
46 | Page
4.3. TROUBLESHOOTING
Breakdown -> fault report Test Action
No air pressure -> flow alarm
For Z-purge
tube fracture, leak in the system Check for leak
Replace
tube
Measuring pressure behind
reducing valve (for z-purge)
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 Ω
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 Ω
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