
4. DAILY MAINTENANCE AND PERIODIC INSPECTION AND MAINTENANCE
4.3 Replacement Methods
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4.3.3 Unit
(1) Control
unit
The basic configuration of the control unit is the type with the control section installed on the
display section.
a) Replacement procedures
Always replace the control unit with the control section power turned OFF.
①
Check that the control section power is turned OFF. (If the power is not OFF, turn it OFF.)
②
Open the operation box door.
③
Disconnect all cables connected to the display section and control section.
④
Remove the fixing screws fixing the control unit onto the operation box, and remove the
control unit from the operation box.
⑤
Replace with a new control unit, and fix the control unit onto the operation box with the fixing
screws.
⑥
Connect all cables connected to the display unit and control section. (Connect the cables to
the designated connectors.)
⑦
Close the operation box door.
Control unit
Operation box
Open the operation box door.
Operation box door
Fixing screws (6 screws)
Incorrect connections may damage the devices, so connect the cables to the specified
connectors.
Do not replace the control unit while the power is ON.
Do not connect or disconnect the connection cables between each unit while the power is ON.
CAUTION