Справочник Пользователя для Mitsubishi Electronics FR-V500

94

Do not conduct a pressure test. Deterioration may occur.

General

Surrounding 
environment

Check ambient 
temperature, humidity, 
dust, dirt, etc.

"

Measure 5cm away from 
the inverter.
(Refer to page 6.)

Ambient 
temperature: -10°C 
to +50°C , non-
freezing.
Ambient humidity: 
90% or less, non-
condensing.

Therm om eter, 
hygrom eter, 
recorder

Overall unit

Check for unusual 
vibration and noise.

"

Visual and auditory 
checks.

No fault.

Power supply 
voltage

Check that the main 
circuit voltages are 
normal.

"

Measure voltages 
across the inverter 
terminal block R, S and 
T phases.

Within permissible 
AC (DC) voltage 
fluctuation (refer to 
page 99)

Tester, digital 
multimeter

Main circuit

General

(1) Check with megger 

(across main circuit 
terminals and earth 
(ground) terminal).

(2) Check for loose 

screws and bolts.

(3) Check for overheat 

traces on the parts.

(4) Clean.

"

"

"

"

(1) Disconnect all cables 

from the inverter and 
measure across 
terminals R, S, T, U, 
V, W and earth 
terminal with 
megger.

(2) Retighten.
(3) Visual check.

(1) 5M

Ω

 or more.

(2), (3) No fault.

500VDC 
class megger

Conductors, 
cables

(1) Check conductors 

for distortion.

(2) Check cable 

sheaths for 
breakage.

"

"

(1), (2) Visual check.

(1), (2) No fault.

Terminal block Check for damage.

"

Visual check

No fault

Relay

(1) Check for chatter 

during operation.

(2) Check for rough 

surface on contacts.

"

"

(1) Auditory check.
(2) Visual check.

(1), (2) No fault.

Resistor

(1) Check for crack in 

resistor insulation.

(2) Check for open 

cable.

"

"

(1) Visual check. 

Cement resistance, 
wire-wound resistor.

(2) Disconnect one end 

and measure with 
tester.

(1) No fault.
(2) Indication

Control cir-

cuit

Protective 

circuit

Operation 
check

(1) Check balance of 

output voltages 
across phases with 
the inverter 
operated alone.

(2) Perform sequence 

protective operation 
test to ensure no 
fault in protective 
and display circuits.

"

"

(1) Measure voltages 

across the inverter 
output terminals U-
V-W.

(2) Simulatively short or 

open the protective 
circuit output 
terminals of the 
inverter.

(1) Phase-to-phase 

voltage balance 
within 4V (8V) for  
200V (400V).

(2) Fault must occur 

because of 
sequence.

Digital 
multimeter, 
rectifier type 
voltmeter

Cooling 

system

Cooling fan

(1) Check for unusual 

vibration and noise.

(2) Check for loose 

connection.

"

"

"

"

(1) Turn by hand with 

power off.

(2) Visual check.

No unusual vibration 
and noise.