Checking The Converter Module; Cleaning - Mitsubishi Electric FR-HC2-7.5K Instruction Manual

Inspection items
5.1.4

Checking the converter module

<Preparation>
(1) Disconnect the external power supply cables (R4/L14, S4/L24, T4/L34, P/+, N/-)
(2) Prepare a tester. (Use 100 range.)
<Checking method>
Change the polarity of the tester alternately at the converter terminals R4/L14, S4/L24, T4/L34, P/+, N/- and check the 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 electric continuity, the
measured value is several  to several tens of . If all measured values are almost the same, although these values
are not constant depending on the module type and tester type, the modules are without fault.
(3) <Module device numbers and terminals to be checked>
Converter Tester Polarity
module
R4/L14
TR1
P R4/L14
S4/L24
TR2
P S4/L24
T4/L34
TR3
P T4/L34
R4/L14
TR4
N R4/L14
S4/L24
TR5
N S4/L24
T4/L34
TR6
N T4/L34
(Assumes the use of an analog meter.)
5.1.5

Cleaning

Always run the converter in a clean status.
When cleaning the converter, gently wipe dirty areas with a soft cloth immersed in neutral detergent.
NOTE
Do not use solvent, such as acetone, benzene, toluene and alcohol, as they will cause the surface paint of the converter
to peel off.
The display, etc. of the operation panel and parameter unit are vulnerable to detergent and alcohol. Therefore, avoid
using them for cleaning.
140
Measured
Value
P Discontinuity
Continuity
P Discontinuity
Continuity
P Discontinuity
Continuity
N Continuity
Discontinuity
N Continuity
Discontinuity
N Continuity
Discontinuity
TR1 TR2
R4/L14
S4/L24
T4/L34
TR4 TR5
P/+
TR3
C
TR6
N/-