Mitsubishi Electric FR-F 700 EC, Instruction Manual

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82
Inspection item
(2) Measuring method of life of the main circuit capacitor
·
If the value of capacitor capacity measured before shipment is considered as 100%,
Pr. 255
bit1 is turned on when
the measured value falls below 85%.
·
Measure the capacitor capacity according to the following procedure and check the deterioration level of the
capacitor capacity.
1) Check that the motor is connected and at a stop.
2) Set "1" (measuring start) in
Pr. 259
3) Switch power off. The inverter applies DC voltage to the motor to measure the capacitor capacity while the
inverter is off.
4) After confirming that the LED of the operation panel is off, power on again.
5) Check that "3" (measuring completion) is set in
Pr. 259 , then read Pr .255 and check the life of the main circuit
capacitor.
6.1.5 Checking the inverter 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
Ω
range.)
<Checking method>
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 continuity.
<Module device numbers and terminals to be checked>
(Assumes the use of an analog meter.)
REMARKS
·
The life of the main circuit capacitor can not be measured in the following conditions.
(a) FR-HC, FR-CV, FR-BU, MT-HC, MT-RC, MT-BU5, or BU is connected.
(b) Terminal R1/L11, S1/L21 or DC power supply is connected to the terminals P/
+
and N/
−
.
(c) Switch power on during measuring.
(d) The motor is not connected to the inverter.
(e) The motor is running.(The motor is coasting.)
(f) The motor capacity is two rank smaller as compared to the inverter capacity.
(g) The inverter is at an alarm stop or an alarm occurred while power is off.
(h) The inverter output is shut off with the MRS signal.
(i) The start command is given while measuring.
· Operating environment:Ambient temperature (annual average 40
°
C (free from corrosive gas, flammable gas, oil mist, dust and
dirt))
Output current (80% of the rated current of Mitsubishi standard 4P motor)
POINT
For the accurate life measuring of the main circuit capacitor, perform after more than 3h passed since the turn off of
the power as it is affected by the capacitor temperature.
Tester Polarity
Measured
Value
Tester Polarity
Measured
Value
Conver
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
vert
er
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
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 /
−