SECTION 7 TROUBLESHOOTING
72
263-13228
7
LCD Display Possible Cause Remedy
Sect
ion
5 21=TMP TEMP/MB CABLE
High pump unit
temperature.
Check that the ambient temperature
around the pump is within the specified
range.
For the air-cooled models, check that
the cooling fan is operating and cooling
is not hindered by peripheral objects.
For water-cooled models, check that the
temperature and flow rate of the cooling
water are within the specified ranges.
Check that no load in excess of the
specified range is continuously applied
to the pump.
Magnetic bearing
cable is not
connected
correctly.
Check the connection of the magnetic
bearing cable. Also check that the
connector pins are not bent. Turn off the
power supply before checking the
magnetic bearing cable. Never
disconnect the cable while the power is
on.
5.3
6
22=TMP:SENSOR ERROR
46=MOTOR OVERSPEED
47=EI:R-SPEED ERROR
Rotation detection
signal from the
motor cannot be
detected correctly.
Check that equipment causing noise is
not used around the power supply unit,
pump unit, motor cable, or magnetic
bearing cable.
5.1
5.2
5.3
7
23=EI:MOTOR OVERCURR
34=EI:INV. OVERCURR
Overcurrent
supplied to the
motor.
Check the motor cable and magnetic
bearing cable.
(Check for connection and wiring likely
to cause disconnection or short circuit.)
8
31=EI:BR OVERTEMP
32=EI:DC-DC OVERTEMP
Temperature
increase in the
power supply unit.
Check that the ambient temperature
around the power supply unit is within
the specified range.
Check the ventilation of the power
supply unit.
4.1
5.1
9 33=EI:FAN ERROR Fan stopped.
Check that the fan on the power supply
unit rear panel is operating.
Remove any object obstructing its
operation.
5.1
10
35=EI:INV. OVERVOLT
36=EI:DC-DC LOW VOLT
37=EI:DC-DC OVERCURR
38=EI:DC-DC OVERVOLT
45=EI:BRAKE OVERTIME
Defective circuit in
the power supply
unit.
Turn the power on again after the pump
stops. The power supply unit must be
repaired if the problem occurs again.
11 43=EI:PARAM ERROR
Defective circuit in
the power supply
unit.
Turn the power on again after the pump
stops. The power supply unit must be
repaired if the problem occurs again.
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