Malfunctions
HON 380 gas pressure regulator with HON 673/674 controller 38
Malfunction Possible causes Correction
Unstable outlet pres-
sure behavior (oscilla-
tions)
The regulator is not being op-
erated with sufficient differen-
tial pressure
Increase the differential pres-
sure with the regulator
The regulator unit’s diaphragm
is too soft
Check the regulator unit’s dia-
phragm; contact the manufac-
turer if necessary
The throttle valve setting is not
correct
Adjusting the throttle valve on
the measuring line of the regu-
lator unit (see page 36)
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