Troubleshooting - Honeywell HON COCON 13 Operator's Manual

4.5 – Trouble shooting
The cartridge must be readjusted if it is not operating as required. The cartridge's operating objectives are described
in paragraph 2.4 on page 13. Adjustment data can be found in paragraph 4.4.
Failures can be caused by:
Problem 1 : The outlet pressure is too high.
Cause 1a : The regulator pilot has not been correctly adjusted.
Solution 1a : Read adjust the pilot. See paragraph 4.4.
Cause 1b : The regulator has failed open. The ssd valve is closed
Solution 1b : Replace the cartridge with a spare cartridge. Check the defective cartridge in the workshop.
Problem 2 : The outlet pressure is too low.
Cause 2a : The regulator pilot has not been correctly adjusted.
Solution 2a : Readjust the pilot. See paragraph 4.7.
Cause 2b : The differential pressure p (p1 – p2) is too small.
Solution 2b : Increase the inlet pressure.
Cause 2c : The filter is severely polluted.
Solution 2c : Replace the filter with a new one. See paragraph 4.10.3. .
Problem 3 : Gas is required, but is not passing through.
Cause 3a : The ball valve is closed.
Solution 3a : Open the ball valve.
Cause 3b : The outlet valve is closed.
Solution 3b : Open the outlet valve.
Cause 3c : The valve in the supply pipe, located within a distance of 5 meters from the station's inlet has
closed.
Solution 3c : Open the valve in the supply pipe.
Cause 3d : The valve in the discharge pipe, located within a distance of 5 meters of the station's outlet has
closed.
Solution 3d : Open the valve in the discharge pipe.
Cause 3e : The regulator pilot has not been correctly adjusted.
Solution 3e : Readjust the pilot. See paragraph 4.7.
Cause 3f : The ssd valve has closed.
Solution 3f : Replace the cartridge with a spare cartridge. Check the defect cartridge in the workshop.
Problem 5 : There is water on the cartridge.
Cause 5 : The cartridge and the pit cover seals are worn.
Solution 5 : Replace the seal rings.
Problem 6 : There is dust in the discharge pipe.
Cause 6 : The filter is defect.
Solution 6 : Replace the defect filter with a new filter. See paragraph 4.8.3..
Operators manual underground gas pressure reducing station
Operators manual
© 2017 Honeywell International Inc.
Type: HON COCON 13
Page 26