17
OEG Pressure storage units DE / DZ
GB
Failure
Troubleshooting
Unit does not start when
switched on
• Check local power supply.
• Has the plug been inserted?
Unit does not get any oil
• Is there still any oil left in tank?
• Severe foam build-up in viewing glass. Has the suction pipe been checked
for tightness?
• Should foot or non-return valves be in the suction pipe, this may result in
pressure increase in the suction pipe due to thermal expansion. Please
remove foot and non-return valves or install a pressure balancing valve or
a diaphragm expansion vessel with oil-resistant membrane.
• Is the filter insert dirty?
• If required, replace it and also replace the O-ring of the filter cup.
Unit switches
• The pre-charge pressure of the diaphragm expansion vessel is not correct.
The pre-charge pressure should be approx. 1.5 bar for an unpressurised
system.
• If the pre-charge pressure is unstable, the expansion vessel is defective
and must be replaced (wear).
Control displays
“Defective Pump 1“
• Failure of first motor / pump (sluggish)
• Test pump / motor
• Test motor current
Control displays
“Defective Pump 2“
• Failure of second motor / pump (sluggish).
•
Check pump / motor.
•
Check motor current.
Control displays
“Defective leakage“
• The leakage detector triggered.
• Remove oil from the sump.
• Fix untightness.
Control displays
“Failure PressureMin“
• Oil pressure too low, pipe rupture protection triggered.
• Check pressurised pipes for leakage.
• Check total burner output, is the design of the unit sufficient?
Control displays
“Failure PressureMax“
• Thermal expansion.
• Release pressure and install additional expansion vessel.
• Check pressure transmitter.
Control displays
“Defective pressure sensor“
• Is there a vacuum on the pressure side? – Remove vacuum.
• If pressure transmitter defective, replacement.
Control displays “Defective
diaphragm expansion vessel“
• Diaphragm expansion vessel defective.
• Unit switched on and off too fast.
Designation
OEG Art. No.
Vessel filller for diaphragm expansion vessel
311 779 100
Adapter for connection of vessel filler
512 240 126
Pre-charge tester for expansion vessels
512 240 121
Pressure control system (installation at burner) DRS 05 up to 90 l/h (approx. 900 kW)
120 570 500
Pressure control system (installation at burner) DRS 1 up to 400 l/h (approx. 4,000 kW)
120 570 510
Pressure control system (installation at burner) DRS 10 up to 900 l/h (approx. 9,000 kW)
120 570 520
Pressure control system (installation at burner) DRS 35 up to 1,500 l/h
(approx. 15,000 kW)
120 570 530
Technical changes
reserved
16.0
Accessories
17.0
Troubleshooting
18.0