Lubing LC-2 - Faults pump system

Top climate system
with LUBING Touch Controller
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40
7.2 Faults pump system
FAULT CAUSE REMEDY
The pump is running, but does
not reach sufcient pressure.
• Main valve does not open, e.g.
due to faulty connections or
defective solenoid coil.
• Main valve does not open
completely, because e.g. the
membrane is damaged (torn).
• Inlet pressure not sufcient during
operation
• Filters blocked
• The pump sucks in air
• Pump valves are leaking
• Pressure regulator is worn out or
incorrectly adjusted
• Leaking pressure lines
• Leaking seals
• Pump speed too low
• Pump ow rate too low for the
connected nozzle system
• Pressure relief valve not closed
• Pressure gauge defective
• Repair connections or replace
solenoid
• Repair main valve (replace dia-
phragm); if membrane is defective
frequently, check pump valves and
pressure regulator and replace if
necessary.
• Increase inlet pressure, check
dimensioning of supply line
• Replace lter cartridges
• Check the supply line and ensure
that it is absolutely airtight
• Replace valves
• Replace pressure regulator or
correct setting
• Check pressure lines
• Replace seals
• Check drive
• Check the dimensioning of the
nozzle system and the selection of
the pump and correct if necessary
• Repair/replace pressure relief
valve
• Replace pressure gauge
The pump runs, but reaches the
rated pressure very slowly.
• Air in the high-pressure lines • Vent high-pressure lines
Nozzles drip on for a long time. • Pressure relief defective/not
installed
• Air in the high-pressure lines
• Repair/Retrot pressure relief
• Vent high-pressure lines
Shocks in the high-pressure
lines
• Air in the high-pressure lines
• Insufcient mounting
• Pressure uctuations
• Vent high-pressure lines
• Improve xation
• See following notes
Irregular pressure uctuations • Worn pump valves
• Foreign objects in the pump valves
• The pump sucks in air
• Leaking seals
• Pressure regulator does not
function properly
• Replace pump valves
• Clean valves
• Check supply line (air bubbles?)
• Replace seals
• Replace pressure regulator
Increase in noise level • The pump sucks in air
• Cavitation due to insufcient water
supply (low pressure, suction line
too small or blocked, main valve
defective, lter blocked, high
water temperature)
• Inlet pressure not sufcient during
operation
• Too high temperatures of the
pumped liquids
• Valve spring broken or softened
• Foreign objects in the pump valves
• Bearings worn out
• Check the supply line and ensure
that it is absolutely airtight
• Check the water supply
• Increase inlet pressure, check
dimensioning of supply line
• Reduce the temperature of the
pumped liquid.
• Replace pump valves
• Clean valves
• Replace pump or repair bearings
Oil leakage at the drive shaft • Shaft seal defective • Replace seal
Water in the oil (white emulsion) • Seals damaged or worn out
• High humidity (condensation
water)
• Piston damaged or worn (hairline
crack?)
• Replace seals
• Change oil and reduce oil change
interval by half.
• Replace piston
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