Checking The Drive Unit And Converter Modules; Cleaning - Mitsubishi Electric FR-E700EX Instruction Manual

6.1.5

Checking the drive unit and converter modules

<Preparation>
(1) Disconnect the external power supply cables (R/L1, S/L2, T/L3) and motor cables (U, V, W).
(2) Prepare a tester. (Use 100 range.)
<Checking method>
Change the polarity of the tester alternately at the drive unit terminals R/L1, S/L2, T/L3, U, V, W, P/+ and N/-, and check for
electric continuity.
NOTE
 Before measurement, check that the smoothing capacitor is discharged.
 At the time of electric discontinuity, the measured value is almost . When there is an instantaneous electric
continuity, due to the smoothing capacitor, the tester may not indicate . At the time of continuity, the measured
value is several to several tens-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
Measured
Polarity
Value
R/L1 P/+ Discontinuity
D1
P/+ R/L1 Continuity
S/L2 P/+ Discontinuity
D2
P/+ S/L2 Continuity
T/L3 P/+ Discontinuity
D3
P/+ T/L3 Continuity
U P/+ Discontinuity
TR1
P/+ U Continuity
V P/+ Discontinuity
TR3
P/+ V Continuity
W P/+ Discontinuity
TR5
P/+ W Continuity
(Assumes the use of an analog meter.)
6.1.6

Cleaning

Always run the drive unit in a clean status.
When cleaning the drive unit, gently wipe dirty areas with a soft cloth immersed in neutral detergent or ethanol.
NOTE
 Do not use solvent, such as acetone, benzene, toluene and alcohol, as they will cause the drive unit surface paint to
peel off.
The display, etc. of the operation panel and parameter unit (FR-PU07) are vulnerable to detergent and alcohol.
Therefore, avoid using them for cleaning.
Tester
Measured
Polarity
Value
R/L1 N/- Continuity
D4
N/- R/L1 Discontinuity
S/L2 N/- Continuity
D5
N/- S/L2 Discontinuity
T/L3 N/- Continuity
D6
N/- T/L3 Discontinuity
U N/- Continuity
TR4
N/- U Discontinuity
V N/- Continuity
TR6
N/- V Discontinuity
W N/- Continuity
TR2
N/- W Discontinuity
Inspection items
P/+
Converter module
D1 D2 D3
R/L1
C
S/L2
T/L3
D4 D5 D6
N/-
Inverter module
TR1 TR3 TR5
U
V
W
TR4 TR6 TR2
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