Checking The Inverter And Converter Modules - Mitsubishi FR-F500 Instruction Manual

Checking the inverter and converter modules

<Preparation>
1) Disconnect the external power supply cables (R, S, T) L
2) Prepare a meter. (Use 100 range.)
<Checking method>
Change the polarity of the tester alternately at the inverter terminals R, S, T, U, V, W, P and N L
V, W, and , and check for continuity.
Note: 1. Before measurement, check that the smoothing capacitor is discharged.
2. At the time of continuity, the measured value is several to several ten's-of ohms depending on the
module type, circuit tester type, etc. If all measured values are almost the same, the modules are
without fault.
<Module device numbers and terminals to be checked>
Tester Polarity
R L P
1
D1
P R L
1
S L P
2
D2
P S L
2
T L P
3
D3
P T L
3
U P
TR1
P U
V P
TR3
P V
W P
TR5
P W
(Assumes the use of an analog meter.)
Measured Value
Discontinuity
D4
Continuity
Discontinuity
D5
Continuity
Discontinuity
D6
Continuity
Discontinuity
TR4
Continuity
Discontinuity
TR6
Continuity
Discontinuity
TR2
Continuity
Converter module
D1 D2 D3
R
L
1
S
L
2
T
L
3
D4 D5 D6
PROTECTIVE FUNCTIONS
, L , L and motor cables (U, V, W).
1 2 3
Tester Polarity
Measured Value
R L N Continuity
1
N R L Discontinuity
1
S L N Continuity
2
N S L Discontinuity
2
T L N Continuity
3
N T L Discontinuity
3
U N Continuity
N U Discontinuity
V N Continuity
N V Discontinuity
W N Continuity
N W Discontinuity
P + Inverter module
TR1 TR3 TR5
C
TR4 TR6 TR2
N –
179
, L
1 2
U
V
W
, L U,
3,