Mono CP800 Pump

Likely Cause: Thermal overload tripped, blown fuse/power failure, motor defect, or faulty pressure switch (pressure system)

Action / Part: Reset thermal overload (red button on capacitor box for single-phase), check electrical supply and fuses, verify pressure switch operation, test motor windings

Likely Cause: Pump not filled before starting, air leak on suction, discharge head too high, suction lift too high, inlet pipe not submerged, or damaged stator/rotor

Action / Part: Fill pump with liquid through plug (OO CP00 0430) adjacent to suction port, check all suction line joints for air leaks, verify suction lift is within 6 metre maximum, ensure inlet pipe adequately submerged, replace stator (RR CP800 2200) and/or rotor (SF CP800 2520) if worn

Likely Cause: Air leak on suction, discharge head too high, suction lift too high, inlet pipe not submerged, or viscosity greater than rating

Action / Part: Check all suction connections for air leaks, verify system head within pump rating, reduce suction lift, increase inlet pipe submersion depth, heat product to reduce viscosity if too thick

Likely Cause: Air or gas in liquid, air leak on suction, insufficient net inlet head, or blocked inlet

Action / Part: Check for air entrainment in pumped liquid, inspect suction line for leaks, increase suction head, clear inlet blockage including foot valve/strainer

Likely Cause: Air or gas in liquid, blocked foot valve/strainer, restriction in line, or excessive suction lift

Action / Part: Eliminate air entrainment, clean foot valve and strainer, remove restrictions in suction line, reduce suction lift below 6 metre maximum

Likely Cause: Cavitation (see above) or pump not bolted down firmly

Action / Part: Address cavitation issues, secure all pump mounting bolts firmly to baseplate, check support foot (AL CP800 6200) mounting

Likely Cause: Worn stator, rotor, or both

Action / Part: Replace stator (RR CP800 2200) and rotor (SF CP800 2520) - always replace together as matched set, check mechanical seal (OO CP800 1060) condition

Likely Cause: Viscosity greater than rating, voltage/frequency differ from rating, thermal overload set too low, motor defect, or pump overloaded

Action / Part: Note: Motor normally runs too hot to hold. Reduce product viscosity, verify voltage matches motor rating (240V or 415V), adjust thermal overload setting (three-phase), check motor current draw, verify motor (CPE1251CSM for 240V, CPE1253M for 415V)

Likely Cause: Low voltage, too frequent starting (single-phase), overload set too low (three-phase), pump overloaded, or motor not protected from sun

Action / Part: Verify voltage at motor terminals, reduce start/stop frequency, adjust thermal overload setting, check current draw against motor rating, provide motor shade/ventilation

Likely Cause: Incorrect pressure switch setting, leaking non-return valve, leak in system, pressure tank too small, or air pre-charge too low

Action / Part: Adjust pressure switch cut-in/cut-out settings, replace non-return valve, repair system leaks, install larger pressure tank, check/adjust pressure tank air pre-charge, inspect air bag in pressure tank

Likely Cause: Three-phase wiring incorrect

Action / Part: CRITICAL: Remove pump from motor before checking direction. Running pump in reverse can cause rotor to unscrew from motor shaft causing severe damage. Correct rotation is clockwise viewed from shaft end. If incorrect, swap any two of the three-phase supply wires