Mitsubishi Electric FR-A700 EC, Инструкция по эксплуатации

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Maintenance and inspection Inspection
FR-A700 EC 8 - 7
8.1.5 Checking the inverter and converter modules
Disconnect the external power supply cables (R/L1, S/L2, T/L3) and motor cables (U, V, W).
Prepare a tester. (Use 100
Ω
range.)
Change the polarity of the tester alternately at the inverter terminals R/L1, S/L2, T/L3, U, V, W,
P/+ and N/
−
, and check for continuity.
At the time of discontinuity, due to the smothing capacitor, the tester may not indicate
앝
. At the
time of continuity, the measured value is several to several ten's-of ohms depending on the mod-
ule type, circuit tester type, etc. If all measured values are almost the same, the modules are
without fault.
b
CAUTION:
Before measurement, check that the smoothing capacitor is discharged.
Fig. 8-3:
Module device numbers and terminals to be
checked
I001305E
Tester Polarity
Measured Value
Tester Polarity
Measured Value
Converter
module
D1
R/L1 P/+ Discontinuity
D4
R/L1 N/
−
Continuity
P/+ R/L1 Continuity N/
−
R/L1 Discontinuity
D2
S/L2 P/+ Discontinuity
D5
S/L2 N/
−
Continuity
P/+ S/L2 Continuity N/
−
S/L2 Discontinuity
D3
T/L3 P/+ Discontinuity
D6
T/L3 N/
−
Continuity
P/+ T/L3 Continuity N/
−
T/L3 Discontinuity
Inverter
module
TR1
U P/+ Discontinuity
TR4
U N/
−
Continuity
P/+ U Continuity N/
−
U Discontinuity
TR3
V P/+ Discontinuity
TR6
V N/
−
Continuity
P/+ V Continuity N/
−
V Discontinuity
TR5
W P/+ Discontinuity
TR2
W N/
−
Continuity
P/+ W Continuity N/
−
W Discontinuity
Tab. 8-4: Continuity check of the modules
Converter module Inverter module