Filter
Top Products
135
Maintenance function
2
FUNCTIONS
1) H1 (Pr. 503) "maintenance timer"
•The cumulative energization time of the inverter is stored into the EEPROM every
hour and indicated in 1000h increments. (Cannot be written.)
•The maintenance timer is clamped at 999 (999000h).
2) H2 (Pr. 504) "maintenance alarm output set time"
•Set the time when the maintenance timer alarm signal (Y95) is output.
•The setting unit is 1000h.
3) Maintenance timer alarm signal (Y95)
•Made valid by setting "95" (maintenance timer alarm output signal) in Pr. 64 or Pr.
65 (output terminal function selection).
•If the value set in H2 is equal to or greater than the H1 setting, the maintenance
timer alarm output (Y95) turns off.
2.12.2 Output phase failure protection selection (H8 )
The parameter number in parentheses is the one for use with the parameter unit (FR-PU04).
<Setting>
When output phase failure protection is made valid (H8 = "1"), the inverter stops
output if output phase failure protection (LF) functions when one of the three phases
(U, V, W) on the inverter output side (load side) opens at motor start. (This function is
invalid at an automatic restart after instantaneous power failure.)
Choose "without output phase failure protection" when the motor capacity is smaller
than the inverter capacity (two ranks or less as a guideline), since performing
operation in such a case may activate output phase failure protection.
REMARKS
The factory setting (87000h) is the guideline for the main circuit smoothing capacitor life (about 10
years in the operating environment of 40
°C ambient temperature, 24h/day, and 365 days/year) of
the inverter. The lifetime changes depending on the operating environment of the inverter.
♦Related parameters♦
• Assignment of Y95 signal to terminal ⇒ Pr. 64 "RUN terminal function selection", Pr. 65 "A, B, C
terminal function selection" (Refer to page 111)
You can select whether to enable/disable the output phase failure protection
function that stops the inverter output if one of the inverter output side (load
side) three phases (U, V, W) opens at motor start.
Parameter Name
Factory
Setting
Setting
Range
Remarks
H8(251)
Output phase failure
protection selection
0 0, 1
Setting is enabled
when Pr. 30 = "1"
H8 Setting Description
0 Without output phase failure protection
1 With output phase failure protection
REMARKS
When parameters are copied from the conventional version of the inverter, setting value of H8
is displayed as "- - -" (65535) and output phase failure protection becomes invalid.