List Of Periodical Replacement Parts - ADT iMaster-U1 Instruction Manual

Check part
1) Check for chatters during
Magnetic
contactor
and relay
2) Check for rough contacts.
1) Check for loose screws and
Printed
circuit
boards
2) Check for abnormal odor and
3) Check for cracks, breakage,
4) Check the capacitors for
1) Check for abnormal noise and
Cooling fan
2) Check for loose bolts.
3) Check for discoloration caused by
Check the heat sink, intake and
Ventilation
exhaust ports for clogging and foreign
path
materials.
Remove dust accumulating on the inverter with a vacuum cleaner. If the inverter is stained, wipe
it off with a chemically neutral cloth.

7.3 List of Periodical Replacement Parts

The inverter consists of many electronic parts including semiconductor devices. Table 7.2
lists replacement parts that should be periodically replaced for preventive maintenance (Use the
lifetime judgment function as a guide). These parts are likely to deteriorate with age due to their
constitution and properties, leading to the decreased performance or failure of the inverter.
When the replacement is necessary, consult your ADT Co., Ltd. representative.
DC link bus capacitor
Electrolytic capacitors on the printed circuit boards
Cooling fan
(Note) These replacement intervals are based on the inverter's service life estimated under the
following conditions.
- Ambient temperature: 40°C
- Load factor: 80% of the rated current given in parentheses ( ) in Chapter 8 "Specifications
- Running 12 hours/day
In environments with an ambient temperature above 40°C or a large amount of dust or dirt, the
replacement intervals may be shorter.
Standard replacement intervals mentioned above are only a guide for replacement, not a
guaranteed service life.
Table 7.1 List of Periodic Inspections (Continued)
Check item
operation.
connectors.
discoloration.
deformation and remarkable rust.
electrolyte leaks and deformation.
excessive vibration.
overheat.
Table 7.2 Replacement Parts
Part name
How to inspect
1) Hearing
inspection
2) Visual inspection
1) Retighten.
2) Olfactory and
visual inspection
3), 4)
Visual inspection
1) Auditory and
visual inspection,
or turn manually
(be sure to turn
the power OFF).
2) Retighten.
3) Visual inspection
Visual inspection
Standard replacement intervals
(See Note below.)
10 years
10 years
10 years
7-3
Evaluation criteria
1), 2)
No abnormalities
1), 2), 3), 4)
No abnormalities
1) Smooth rotation
2), 3)
No abnormalities
No abnormalities