Union Instruments CWD2000 EX, Original Operating Instructions

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Troubleshooting
95
12.4 Faulty ignition
The combustion calorimeter ignites permanently, the flame is burning. Combustion
calorimeter does not enter operating mode.
Incorrect temperature setting (too high). Lower the temperature threshold.
The combustion calorimeter switches to operating mode even though the flame
does not burn and then returns to ignition mode.
Incorrect temperature setting (too low). Increase the temperature threshold.
Ignition electrode corroded, normal wear after frequent ignition.
Replace ignition electrode.
The combustion calorimeter does not ignite.
24V power supply via pressure switch is interrupted.
12.4.1 Fault / status messages with description
Int. pressure

Alarm in case of lack of process gas or calibration gas

Threshold adjustable; default: 14 mbar
Overtemp

The flame is too hot. Wobbe signal > 76 mV,

Temperature increase in the inner tube of the thermal battery > 50°C
Fault

Gas pressure to low

Fault in thermal battery

Defective PT 100 temperature sensor
Service

No compressed air present or pressure too low

Air inlet temperature > 41°C
Operation

Flame is burning, analyser is running with process or calibration gas
Operation delay

Flame is burning, analyser is running with process or calibration gas

Delay time has expired after which the analog signals are released