6
To use the product safely for a long time, please follow the instructions below.
1. For regular inspections, contact your vender or electrician.
2. The estimated life expectancy of the motor is about 20,000 hours, but it may vary depending on the use conditions.
If you find any abnormal noise, please replace the motor.
Regular inspection (for service company)
Inspect the product by following the table.
Meaning of symbols:
: needs regular inspection
: needs to replace regular replacement parts
Maintenance and Inspection
Daily check (for customer)
1. Check if the product generates any abnormal noise or vibration compared with the initial condition (by hearing and touching
etc.)
2. Remove the drain gum, and check that no water remains inside the product. If any water remains, remove it completely and
ask a professional cleaning service to clean inside the product. And, take measured to prevent water from entering the product.
After checking is completed, be sure to mount the drain gum.
Note:
Regular inspections will extend the product life as well as maintain the operation efficiency and prevent the excessive energy consumption.
(When the product is used in severe conditions, the inspection cycle should be shorter than that in the below table.)
Note:
The table above gives general indications, and the contents may vary depending on the use situation or installation condition.
The typical sample operation time is 10 hours per day, 300 days per year, and 3000 hours as a standard use.
Part name
Elapsed years
Inspection
Criteria
(Indication)
Maintenance
Remarks
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
1
Entire fan
Update equipment
2
Casing
Guide vanes
3
Wheel
5
Terminal
• Check noise and
vibration.
(by hearing and
touching)
• Check attaching
screws for looseness.
(with tool)
• Check the
appearance.
(visually)
• Check noise and
vibration.
(by hearing and
touching)
• Check the
appearance.
(visually)
• Check rotation.
(visually, with
manual rotation)
• Check noise and
vibration.
(by hearing and
touching)
• Check the
appearance.
(visually)
• Check noise and
vibration.
(by hearing and
touching)
• Check terminal
block and screws
for looseness.
(with tool)
• Tighten foundation
bolt and hanging bolt.
• If difficult to repair,
replace the product.
• Clean and remove
extraneous material.
• If there is abnormal
rust, corrosion, crack,
or deformation,
replace the part.
• Tighten each
attaching screw.
• If there is damage
by contact, replace
the part.
• Clean and remove
extraneous material.
• If there is abnormal
rust, corrosion, crack,
or deformation,
replace the part.
• If there is damage by
contact, replace the
part.
• Tighten with tool.
• Clean and remove
extraneous material.
• If there is abnormal
rust, corrosion, crack,
or deformation,
replace the part.
• If there is any
problem, replace the
part.
• Tighten with tool.
• Tighten with tool.
• Regular replacement
parts.
(The terminal is not
supplied with
K25DSF2NET.)
• No abnormal noise
or vibration.
• No looseness.
• No abnormal rust,
corrosion,
extraneous
material, or
deformation.
• No abnormal noise
or vibration.
• No abnormal rust,
corrosion,
extraneous
material, or
deformation.
• No abnormal sound.
• No contact with fan
casing.
• No looseness.
• No abnormal rust,
corrosion,
extraneous material,
or deformation.
• No abnormal noise
or vibration.
• No looseness.
4
Motor
