Low pressure regulator Type FL 90-4, Type FL 91-4
part no. 05 004 52 b
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TROUBLESHOOTING
Fault cause
Action
Gas smell
Leaking LPG is extremely
flammable.
Can cause explosions.
Close the gas supply.
Do not use any electric switches.
Do not use a phone in the building.
Ventilate rooms well.
Shut down the LPG system.
Contact a specialised company.
Abnormal flame pattern of
non-adjustable pressure
regulator
Compare the nominal outlet pressure with the nominal
connection pressure:
if they do not correspond, replace the pressure regulator
or the gas appliance
Measure the outlet pressure; outlet pressure is not within
the specified limits:
check the system configuration
pressure regulator is defective, replace
check the gas filter
No gas flow
Gas feed is closed:
open the gas cylinder valve or the shut-off fittings
Safety overpressure shut-off valve (OPSO) is closed:
carry out the steps described in "Restarting the safety
overpressure shut-off valve (OPSO)"
UPSO / EFV is closed:
carry out the steps described in "Restarting UPSO / EFV"
Filter sieve in the input connection is dirty:
send the pressure regulator to the manufacturer to be
checked
Safety overpressure shut-off
valve (OPSO) has responded:
Visual indicator
RED
OPSO is closed:
Causes (remedy of defects):
Pressure increase, pressure regulator fault, etc
Open OPSO manually by following the steps in
"Restarting the safety overpressure shut-off valve (OPSO)".
