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5.5 Protection feature
Protection feature to show for table 3 is incorporated in a protection feature
motor driver circuit.
When even one protection that showed in table 3 works, it is output as an
alarm signal by an outside interface connector.
Table 3 Protection feature
Protection
item
Contents
1 Overheat
protection
Be motor stopping when do rise in heat to
80
℃
±10%
2
Power supply over voltage
protection
Be more than AC144V or AC288V, and a
motor stops
3 Anomaly of a Hall element IC
Motor stops unless signal from a Hall
element IC are detected.
4 System error
Motor stops in computer anomaly
5 Over speed protection
When rotating speed goes over 4200min
-1
, be
motor stopping
6 Over current protection
Be motor stopping when go over torque
0.96N
・
m
7 Over current electric fuse
AC250V 10A
8
Magnet coupling step out
detection
Be step out detection when become less
than torque 0.13N
・
m
Operation mode 3
A protection feature is reset by exclusion of an error cause and electric
source off more than 10 second.
But 3 4 7 of protection item becomes repair required.
Please contact store or our company overseas business division.
Customer service department copes adequately.
When requesting the manufacturer’s service department to overhaul the
pump, always write the type of the vacuumed gas on the “Pump Usage
Check Sheet” attached at the back of this manual and submit it. Note that
if toxic gases are exhausted, both the pump itself and pump oil will
become contaminated. Please be sufficiently aware that use with some
gases will preclude overhaul.
Danger
