SECTION 7 TROUBLESHOOTING
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263-13228
7
Table 7-5 If the ALARM Lamp Flashes
※ When warnings of alarm codes 86 to 94 (See Table 7-7 "Table of Warnings") occur, the
alarm lamp does not flash and the display appears on the LCD only if the warning output
setting is OFF in the menu mode SETTINGS/WARNING DISPLAY item on the LCD.
LCD Display Possible Cause Remedy
Sect
ion
1
81=MB:SELFCHECK X1
82=MB:SELFCHECK Y1
83=MB:SELFCHECK X2
84=MB:SELFCHECK Y2
85=MB:SELFCHECK Z
Rattling of the
protective bearing
becomes
pronounced.
Deterioration of the protective bearing is
likely. Overhaul as soon as possible to
avoid damage to the protective bearing
in the event of a power failure etc.
2
86=MB:VIB. WARN. X1
87=MB:VIB. WARN. Y1
88=MB:VIB. WARN. X2
89=MB:VIB. WARN. Y2
90=MB:VIB. WARN. Z
Transient strong
external shock or
vibrations.
Continuous operation is possible.
However, if the shock or vibrations occur
frequently, stop the pump and remove
the source of the shock or vibrations; or
re-examine the pump mounting method.
3
91=MB:BALANCE WARN.1
92=MB:BALANCE WARN.2
Rotor inside the
pump is out of
balance.
Adhesion of reaction products is a
possibility. An overhaul is
recommended.
4
93=MB:AIR RASH A
94=MB:AIR RASH B
Atmospheric
penetration has
occurred.
Create a vacuum system not allowing
atmospheric penetration by re-
examining the operating sequence of
the back pump and valves etc.
5 99=MAINTENANCE TIME
Maintenance call
timer has reached
the set time.
Implement maintenance works
prescribed by the customer, such an
overhaul. The alarm can be cancelled by
resetting the maintenance call timer
after implementing necessary works.
6.6
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