Mitsubishi FR - S500 151, Inspection Description, Interval, Daily 1 year, Method Criterion

Areaof Inspection	Inspection	Description
	Item
		(1) Check with
		megger
		(across
		main circuit
		terminals
General		and ground
	General	terminal).
		(2) Check for
		loose screws
		and bolts.
		(3) Check for
		overheat on
		each part.
		(4) Clean.
		(1) Check
		conductors
	Conductors,	for distortion.
	cables	(2) Check cable
		sheaths for
		breakage.
	Terminal	Check for
	block	damage.
	Inverter	Check
	module	resistance
	Converter	across
	module	terminals.
circuit		(1) Check for
Main
		liquid
		leakage.
		(2) Check for
	Smoothing	safety valve
	capacitor	projection
		and bulge.
		(3) Measure
		electrostatic
		capacity.
		(1) Check for
		chatter
		during
	Relay	operation.
		(2) Check for
		rough
		surface on
		contacts.

Interval

Periodic*

Daily 1 year 2 years

Method	Criterion	Instrument
(1) Disconnect	(1) 5MΩ or	500VDC
all cables	more.	class
from inverter	(2), (3) No	megger
and measure	fault.
across
terminals R,
S, T, U, V, W
and ground
terminal with
megger.

(2)Retighten.

(3)Visual check.

(1), (2) Visual	(1), (2) No fault.
check.

Visual check	No fault
Disconnect
cables from
inverter and
measure across
terminals R, S,	Refer to page	Analog
T↔ P, N, and	153.	meter
across U, V,
W↔ P, N with a
meter with a
100Ω range.
(1), (2) Visual	(1), (2) No fault. Capacity
check.	(3) 85% or	meter
(3) Measure with	more of
capacity	rated
meter.	capacity.

(1)	Auditory	(1) No fault.
	check.	(2) No fault.
(2)	Visual check.

151