Pentair Pool Products Nocchi R2T, Use And Maintenance Manual

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Problem/Causes
Problem Causes
A - The motor fails to run when started 1 - The line voltage has been interrupted
2 - Burnt fuse
3 - Tripped thermal relay
4 - No conduction in the starter contacts or faulty coil
5 - Burnt fuses in the auxiliary circuit
6 - Faulty motor
B - The starter thermal switch trips when voltage is applied 1 -
Burnt fuse
2 - Faulty starter contacts
3 - Faulty electric connections
4 - Faulty motor windings
5 - The machine is mechanically blocked
6 - The thermal relay calibration is too low
C - The thermal relay trips occasionally without apparent
reason
1 - The thermal relay calibration is too low
2 - The line voltage is periodically missing
3 - The line voltage in peak periods is too low
D - The thermal relay has not tripped, but the machine is
unable to run
1 - The line voltage has been interrupted
2 - Burnt fuse
3 - No conduction in the starter contacts or faulty coil
4 - Burnt fuses in the auxiliary circuit
E - The machine flow rate is irregular
1 - Air present in the suction tube or in the pump
2 - The pressure on the suction side is insufficient
3 - The suction pipe is partially obstructed
F - The machine runs but fails to supply fluid
1 - The suction pipe or pump are obstructed
2 - The bottom (or stop) valve is blocked in closed position
3 - Leaks in the suction line
4 - Air in the suction line or pump
G - When stopped the machine runs in opposite direction 1 - Leaks in the suction pipe
2 - Faulty bottom (or stop) valve
3 - The bottom (or stop) valve is blocked in partially or fully
opened position
H - Fluid leaks in mechanical seals 1 - Misaligned pump shaft.
2 - Faulty mechanical seal
I - The pump is too noisy
1 - Pump cavitation due to insufficient pressure on the suction
side.
2 - Misaligned pump shaft.
3 - Foreign material inside the pump.