
Could not connect. Check the PSK settings.
The network key (PSK) of a wireless router to be connected is not set to the machine correctly.
●
Check the network key (PSK) of the wireless router, and set it to the machine again.
Checking the SSID and Network Key(P. 150)
Setting Up Connection by Selecting a Wireless Router(P. 143)
Setting Up Connection by Specifying Detailed Settings(P. 146)
●
If the problem persists even after checking the network key, check whether the machine is properly
installed and ready to connect to the network.
Installation/Settings Problems(P. 369)
Could not connect. Max connections to access point reached
You tried to connect to a wireless LAN router to which the maximum possible number of devices are
already connected.
●
Decrease the number of devices connected to the wireless LAN router (the number of clients). For the
maximum number of devices that can be connected to a wireless LAN
router, see the instruction manual for the router or contact the manufacturer of the router.
Could not detect any connections from wireless devices.
It was not possible to detect any mobile device within the predetermined length of time.
●
Connect again paying attention to the time limit.
Make Direct Connection (Access Point Mode)(P. 125)
Could not perform cleaning.
Paper jammed during cleaning.
●
Remove the jammed paper, set paper correctly, and perform cleaning again.
Clearing Jams(P. 350)
Fixing Unit(P. 394)
The amount remaining in toner cartridge required for cleaning the fixing unit is insufficient.
●
Cleaning requires sufficient toner cartridge remaining. Replace the toner cartridge, and perform the
cleaning again.
Replacing Toner Cartridges(P. 396)
Could not perform Open System auth. Check WEP settings.
The authentication method of the machine is set to <Open System>, but that of a wireless router is set to
"Shared Key."
Troubleshooting
359
Summary of Contents for LBP251
Page 1: ...LBP252dw LBP251dw User s Guide USRMA 0786 00 2016 06 en Copyright CANON INC 2015 ...
Page 35: ...LINKS Using the Operation Panel P 30 Basic Operations 29 ...
Page 69: ...Exiting Sleep Mode Press any key on the operation panel Basic Operations 63 ...
Page 75: ...Printing 69 ...
Page 83: ...LINKS Basic Printing Operations P 70 Checking the Printing Status and Log P 78 Printing 77 ...
Page 117: ...LINKS Printing via Secure Print P 112 Printing 111 ...
Page 122: ...Checking the Printing Status and Log P 78 Printing 116 ...
Page 178: ...3 Click OK 4 Click Close LINKS Setting Up Print Server P 173 Network 172 ...
Page 233: ...LINKS Configuring Printer Ports P 168 Security 227 ...
Page 316: ...0 Auto Shutdown is disabled 1 to 4 to 8 hr Setting Menu List 310 ...
Page 355: ...Troubleshooting 349 ...
Page 470: ...Appendix 464 ...
Page 478: ...Manual Display Settings 0W20 08J Appendix 472 ...