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Table 1.2
Check what alarm the alarm display of theamplifier indi-
cates.
of the indication lamp (see Appendix 8).
At which of phase R, S, and T a fuse is blown?
(Control circuit input fuse)
Does the trouble or fault repeatedly occur?
Is the ambient temperature and temperature in the
panel normal?
During what situation does the trouble or fault occur?
During acceleration, deceleration, or constant speed?
At what speed it occurs?
Does the trouble or fault differ between the forward
rotation and reverse rotation?
Is there an instantaneous power failure?
Does the trouble or fault occur when a special opera-
tion or instruction is executed?
How often does the trouble or fault occur?
At what load situation does the trouble or fault occurs?
10
Whether a load is applied or removed?
Is a suspicious part replaced with a new one or a
temporary repair conducted against the trouble or
fault?
12
How many years has the equipment been operated?
Is the power voltage normal?
13
Does it vary remarkably depending on the time zone?
By referencing the trouble classification shown in Table 1.4,
check the power voltage listed in Table 1.3 before conducting
troubleshooting and countermeasures.
Check items upon occurrence of trouble
In addition, check old alarms in the alarm mode
(Is that 55°C or less?)
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