Mitsubishi Electric 800 Series Instruction Manual page 43

2
Inverter parts life display
The degree of deterioration of the control circuit capacitor, main circuit capacitor, cooling fan, inrush current limit
circuit, and relay contacts of terminals A, B, and C can be diagnosed on the monitor. When the life span of each part
is near its end, the self-diagnostic warning is output to prevent a fault. (Use the life check of this function as a guideline
only, since the life span of each part except for the main circuit capacitor is calculated theoretically.)
Pr. Name
255
Life alarm status display
E700
507 Display/reset ABC1 relay
E706 contact life
508 Display/reset ABC2 relay
E707 contact life
*1 The setting range (read-only) differs depending on the inverter model (standard model, separate converter type, or IP55 compatible
model).
 Life alarm display and signal output (Y90 signal, Pr.255)
• In the life diagnosis of the main circuit capacitor, the alarm signal (Y90) is not output unless measurement by turning
OFF the power supply is performed.
• Pr.255 Life alarm status display and the Life alarm (Y90) signal can be used to check whether or not the life alarm output
level is reached for the following parts: the control circuit capacitor, main circuit capacitor, cooling fan, inrush current limit circuit,
relay contacts of terminals A, B, and C, and internal air circulation fan. (Internal air circulation fans are equipped with IP55
compatible models.)
bit 15 7
0 0 0 0 0 0 0 0 0 0 0 0 1 0 0
bit6 ABC1 relay contact life
bit7 ABC2 relay contact life
• When the parts have reached the life alarm output level, the corresponding bits of Pr.255 turns ON. The ON/OFF state of the
bits can be checked with Pr.255. The following table shows examples.
Pr.255
bit 7
Decimal Binary
239 11101111 ○
5 101 ×
0 0 ×
○: Parts reaching alarm output level ×: Parts not reaching alarm output level
Initial
value
0
100%
100%
0
1
bit0 Control circuit capacitor life
bit1 Main circuit capacitor life
(Standard models and IP55 compatible models only)
bit2 Cooling fan life
bit3 Inrush current limit circuit life (Standard models and IP55 compatible models only)
bit4 Life of internal air circulation fans (IP55 compatible models only)
bit5 Estimated residual-life of main circuit capacitor (Standard models and IP55 compatible models only)
bit 6 bit 5 bit 4
○ ○ ×
× × ×
× × ×
Setting range
Displays whether or not the life alarm output level is
reached for the following parts: the control circuit
*1
capacitor, main circuit capacitor, cooling fan, inrush
(0 to 255)
current limit circuit, and relay contacts of terminals A,
B, and C. Read-only.
Displays the degree of deterioration of the relay
(0 to 100%)
contacts of terminals A1, B1, and C1.
Displays the degree of deterioration of the relay
(0 to 100%)
contacts of terminals A2, B2, and C2.
• Pr.255 read
bit 3 bit 2 bit 1
○ ○ ○
× ○ ×
× × ×
2
Description
• Pr.255 setting read
Bit image is displayed
in decimal
bit 0 Remarks
All parts have reached alarm output
○
level for standard structure models.
Control circuit capacitor and cooling
○
fan have reached alarm output level.
No parts have reached alarm output
×
level.
BCN-C22005-931