Mitsubishi Electric 800 Series Instruction Manual page 184

 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.
• Whether or not the parts of the control circuit capacitor, main circuit capacitor, cooling fan, inrush current limit circuit, or
relay contacts of terminals A, B, and C have reached the life alarm output level can be checked with Pr.255 Life alarm
status display and the Life alarm (Y90) signal.
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
• Diagnosable parts differ depending on the type of the inverter.
Part
Control circuit capacitor
Main circuit capacitor
Cooling fan
Inrush current limit circuit
Main circuit capacitor (estimated residual life)
ABC relay contact
○: Diagnosable, ×: Undiagnosable
• The Life alarm (Y90) signal turns ON when the life alarm output level is reached for either of the following: the control circuit
capacitor life, main circuit capacitor life, cooling fan life, inrush current limit circuit life, estimated residual-life of the main
circuit capacitor, ABC1 relay contact life, or ABC2 relay contact life.
• For the terminal used for the Y90 signal, set "90" (positive logic) or "190" (negative logic) in any of Pr.190 to Pr.196 (Output
terminal function selection).
0
1
bit0 Control circuit capacitor life
bit1 Main circuit capacitor life
(Standard models)
bit2 Cooling fan life
bit3 Inrush current limit circuit life
(Standard models)
bit4 Always 0
bit5 Estimated residual-life of main circuit capacitor
(Standard models)
bit 6 bit 5 bit 4 bit 3
○ ○ × ○
× × × ×
× × × ×
Standard model
○
○
○
○
○
○
• Pr.255 read
bit 2 bit 1 bit 0
○ ○ ○ 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.
Applicable inverter
Separated converter type
○
×
○
×
×
○
5.4 (E) Environment setting parameters
• Pr.255 setting read
Bit image is displayed
in decimal
Remarks
183
5. PARAMETERS
3
4
5
5
5
6
7
8
9
10