Hitachi WJ C1 Series

Chapter 9 Inverter Functions
9-11-8
9.11.8 Outputting a Warning for Cooling Fan Life
 How to be notified before the cooling fan reaches the end of life?
 Assigning "Cooling-fan life warning [WAF](40)" to one of the output terminal functions
([C021]/[C022]/[C026]) enables the inverter to output a cooling fan life warning signal.
 The life of the cooling fan is estimated based on the accumulated operating hours of the cooling
fan and the ambient temperature set for "Ambient temperature [b075]", and a signal is output
when the replacement time is reached.
 After replacing the cooling fan, life of the replaced new cooling fan can be assessed by clearing
the accumulated operating hours using the "Accumulated cooling fan run time clear [b093]".
 The status of this signal can also be monitored by the "Life assessment monitor [d022]".
 When this signal is output, check the cooling fan for clogging, etc.
 Do not clear the accumulated operating hours except when replacing the cooling fan, as the
cooling fan life assessment will not function properly.
 When the fan is stopped due to "Cooling fan control method selection [b092]", the cooling fan
operating hours are not accumulated.
Code
Item
Description
Data
[d022]
Life assessment
monitor
Indicates the life assessment of
the electrolytic capacitor on the
board and the cooling fan.
ON: Expired
OFF: Normal
1: Capacitor on board
2: Cooling fan
[b075]
Ambient
temperature
Set the ambient temperature of
the operating environment.
-10 to 50 (°C)
[b093]
Accumulated
cooling fan run
time clear
Clears the accumulated operating
hours of the cooling fan.
00: Disabled
01: Clear
[C021]
[C022]
[C026]
Output terminal
function
Cooling-fan life warning [WAF]:
Outputs a cooling fan life
warning.
OFF: No warning
ON: Time to replace the
board due to cooling
fan life expiration
40
Q
!
A
ON
OFF
2 1