9. Maintenance and
Warranty
9-2
TNU
WARNING
1.
Maintenance and inspection
Before conducting maintenance and inspection works, be sure to stop the machine and
shut off the power supply. Take security measures like locking, etc. to ensure any unau-
thorized person cannot turn the power ON.
Otherwise, injury caused by unexpected behavior may occur.
Obligatory
1-1
Periodical inspection
1-1-1
Periodical inspection of TNU and TJU
Perform the following inspection works once every 6 to 12 months.
Inspection items
Inspection Procedures
Actions
Cleaning of the
body unit
There shall be no dust, particles or oil content
adhered on the unit.
Clean it with cloth or the like.
Loose connector/
screw
There shall be no loose connectors or fixing
screws.
Securely re-connect or re-
tighten.
Abnormality of unit
parts
There should be no discoloration, damage or
disconnection due to heating.
Replace with new one.
1-2
Standard of durability of consumables for TNU and TJU
1-2-1
Standard of durability of consumables for TNU
Parts listed in the table below are subject to aged deterioration. The periods indicated in the
durability are only for reference.
Consumables
Location
Durability
Contact relay
TDO connection circuit (with TDO connected) 100,000 cycles
• We do not provide repair service for TNU and TJU out of the warranty period. Please prepare a spare TNU
and TJU in advance or purchase new ones.
Important
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