Zenit UNIQA M08L, First Installation Manual

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First installation manual – Translation of original instructions
6.3.3 Bearings
The bearings are either rolling, ball or roller, depending on the size of the electro-mechanical unit, and are all sized to last for 50,000 hours of
operation under normal conditions.
6.3.4 Mechanical seals
The estimated duration of safe operation for the mechanical seals is 20,000 hours under normal conditions and 7,000 hours in faulty operating
conditions (dry operation or with fluids containing debris), at which point they need to be changed.
7. TROUBLESHOOTING GUIDE
DEFECTS POSSIBLE CAUSE SOLUTION
Motor does not run no power check power supply line
incorrect power supply voltage set voltage at level stated on nameplate
incorrect starting type check starting type
circuit breaker and/or fuses tripped check calibration of circuit breaker and/or that the
correct type of fuses are fitted
impeller jammed identify the cause of the jam and remove it
thermal protection tripped wait for motor to cool
The pump works but little or no liquid is
delivered
check valve jammed clean valve and check its operation
pipeline obstructed find and remove the obstruction
impeller, valve or pipelines obstructed find and remove the obstruction
liquid level too low stop the pump at once and install a level control
system
wrong rotation direction swap phases
Thermal protection tripped impeller jammed identify the cause of the jam and remove it
EN