Справочник Пользователя для Mitsubishi Electronics FR-A700

The self-diagnostic alarm is output when the life span of the control circuit capacitor, cooling fan, each parts of the

inrush current limit circuit is near its end. It gives an indication of replacement time .

 Refer to page 386 to perform the life check of the inverter parts.

(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

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 conduction.

(Assumes the use of an analog meter.)

Always run the inverter in a clean status.
When cleaning the inverter, gently wipe dirty areas with a soft cloth immersed in neutral detergent or ethanol.

Main circuit capacitor

85% of the initial capacity

Control circuit capacitor

Estimated 10% life remaining

Inrush current limit circuit

Estimated 10% life remaining (Power on: 100,000 times left)

Cooling fan

Less than 50% of the predetermined speed

1. Before measurement, check that the smoothing capacitor is discharged.

2. At the time of electric discontinuity, due to the smoothing capacitor, the tester may not indicate 

∞. At the time of electric

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.

C

onv

er

ter

 

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

In

ve

rte

r 

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

Do not use solvent, such as acetone, benzene, toluene and alcohol, as they will cause the inverter surface paint to peel off.
The display, etc. of the operation panel (FR-DU07) and parameter unit (FR-PU04/FR-PU07) are vulnerable to detergent and
alcohol. Therefore, avoid using them for cleaning.

Converter module

Inverter module

D1

D2

D3

D4

D5

D6

TR1

TR3

TR5

TR4

TR6

TR2

U

V

W

R/L1

S/L2

T/L3

C

P/+

N/

−