Mitsubishi Electric MELSEC iQ-F FX5UC Series, User Manual

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16 MAINTENANCE AND INSPECTION
16.1 Daily Inspection
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16
16
MAINTENANCE AND INSPECTION
16.1
Daily Inspection
Perform the following inspections on a daily basis.
16.2
Periodic Inspection
Perform the following inspections once or twice every 6 months to a year.
Also perform the inspections when facilities have been relocated or modified or when wiring has been changed.
*1 The operating ambient temperature is 0 to 55

for products manufactured before June 2016.
The product life of relay output contacts varies considerably depending on the load type used. Note that loads
generating reverse electromotive force or rush current may cause poor contact or welding of contacts which
may lead to considerable reduction of the contact product life.

Page 191 Product life of relay output contacts
Item Inspection item Description
1 Installation
status of the
module Looseness of mounting
screws Retighten the mounting screws.
Mounting status of the
module The module should be securely mounted.
Looseness of cover The cover should not be off.
2 Connection
status Looseness of terminal
screws Retighten the terminal screws.
Proximity of crimp terminals Check the proximity between crimp terminals and correct the clearance.
Looseness of connectors Connect cable connectors securely.
3 LED status Check that the LED status is normal.

Page 253 Checking with LEDs
User's manuals for each module
Item Inspection item Description
1 Ambient
environment Operating ambient
temperature The temperature in the control panel should be -20 to 55

.
*1
(FX5U CPU module/ FX5UC CPU
module)
The temperature in the control panel should be 0 to 55

. (FX5UJ CPU module/ FX5S CPU
module)
Operating ambient humidity The humidity in the control panel should be 5 to 95%RH.
Working atmosphere Free from corrosive or flammable gas and excessive conductive dust.
2 Power supply voltage Voltage within the specified range should be supplied.
3 Installation
status Looseness, rattling Retighten mounting screws.
Dirt, foreign objects Wipe away any dirt or foreign objects. Clean the module.
4 Connection
status Looseness of terminal
screws Retighten the terminal screws.
Proximity of crimp terminals Check the proximity between crimp terminals and correct the clearance.
Looseness of connectors Connect cable connectors securely.
5 Battery BAT LED The BAT LED should be turned off. When flashing, replace the battery with a new one.
Period following the battery
purchase Replace the battery with a new one if 5 years or more have passed since the battery was
purchased.
OFF status of SM51
(SM8005), SM52 (SM8006) SM51 (SM8005) and SM52 (SM8006) should be off. When SM51 (SM8005) and SM52 (SM8006)
are on, replace the battery with a new one.
6 Module diagnostics The normal status of the system should be checked with the Module Diagnostics.

Page 256 Module diagnostics
7 Relay contacts Check the product life of relay outputs.

Page 191 Product life of relay output contacts