Malfunctions - Honeywell HON 380 User And Maintenance Instructions

7

Malfunctions

Contents
7.1 Malfunctions
Pressurized parts
Malfunctions and
abnormalities
HON 380 gas pressure regulator with HON 673/674 controller
Topic
Malfunctions
Risk of serious injury posed by pressurized components moving in an uncon-
trolled manner when handled improperly.
If not handled properly or in the event of a defect, gas can escape from pressur-
ized components under high pressure and cause serious injuries and even death.
Before you start working on these components:
 Close all connections leading to the gas-carrying line.
 Establish a depressurized status. Residual amounts of energy must be depres-
surized as well.
The following table contains a description of malfunctions and abnormalities that
may occur during the operation and lists procedures to correct them:
Malfunction
Regulator unit does
not open
The regulator unit will
not close
The regulator unit is
opening/closing too
slowly
The pressure that
needs to be regulated
is not being regulated
The sealing pressure is
too high
Leaks on the outside
Leaks on the inside
Possible causes
Regulator unit malfunction
Faulty regulator unit
The regulator's control speed is
not correct
Diaphragm of the regulator
unit is defective
The regulator unit's pilot spring
is not compatible with the de-
sired control range
Pilot spring of the regulator
unit is defective
The control diaphragm is too
hard
The edge of the nozzle is dam-
aged
The screws and/or fittings were
not tightened correctly
The gaskets are faulty
Diaphragm of the regulator
unit defective
Valve plate is defective
Malfunctions
Page
Correction
Performing maintenance on
regulator unit (see page 47)
Performing maintenance on
regulator unit (see page 47)
Regulating the regulator's con-
trol speed, Adjusting the throt-
tle valve on the measuring line
of the regulator unit (see page
36)
Perform maintenance on regu-
lator unit (see page 47), possi-
bly replace regulator unit
Remove the pilot spring and
check the color code against
the control ranges listed in the
spare parts list
Remove the pilot spring and
check it for damage
Check the regulator unit's con-
trol diaphragm
Check the edge of the nozzle
for damage.
Check the tightening torques
Check the gaskets for damage
Check the regulator unit's dia-
phragm for damage
Check valve plate for damage
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