Epson TM-m30III troubleshooting: lights, errors and fixes

CauseNo power reaches the printer, or the power button wasn't held long enough.

Fix

1. Check the AC cable at the adapter and the socket, and the DC cable at the rear of the printer, under the covers.
2. Hold the power button until the Power LED lights. A flashing Power LED means the printer is starting its network, shutting down or updating firmware: wait and don't unplug it.

CauseWith the Error LED also on, no paper is detected. With only the Paper LED, the roll is nearly empty (about 24 mm of roll diameter left).

Fix

1. Open the roll paper cover with the cover open lever and remove the empty core.
2. Drop in a new 80 mm roll, up to 83 mm in diameter, so it unrolls as in Epson's loading diagram.
3. Pull out a little paper and close the cover. The printer cuts the paper and goes back online.

CauseThe roll paper cover is open, the autocutter blade is blocked, paper has jammed, or the head or motor is too hot.

Fix

1. Close the roll paper cover firmly.
2. If it was closed, open it and remove any jammed receipt or foreign object, such as a staple, near the cutter. The printer recovers when you close the cover.
3. After long print runs, let the printer cool for a few minutes. Temperature errors clear by themselves. Don't touch the hot thermal head.

CauseA receipt is caught in the paper path or cutter, often because it was held while printing or before the cut finished.

Fix

1. Switch the printer off and open the roll paper cover.
2. Remove the jammed paper. Never pull it out forcibly.
3. Close the cover and switch on. If the cover won't open with the lever, restart the printer and try again.

CauseAn unrecoverable error, such as a voltage, CPU or communication unit error.

Fix

1. Switch the printer off at once: hold the power button until the Power LED flashes, or unplug the DC cable.
2. Wait 10 seconds, then switch it on again.
3. If the Error LED still flashes, the printer may be faulty. Contact us for service.

CauseThe device on the USB-A or USB-C port isn't supported, or it is connected through a USB hub.

Fix

1. Remove the device or hub.
2. Connect only supported accessories directly, such as the OT-WL06, a DM-D30 or DM-D70 customer display, or a barcode scanner.

CauseThermal paper only darkens on its coated side, so a roll loaded the wrong way round prints blank receipts. Faint print usually means a dirty thermal head.

Fix

1. Turn the roll over and reload it as in Epson's loading diagram.
2. Use thermal paper 48–80 µm thick and adjust the print density to the paper type.
3. Clean the cooled thermal head with a cotton swab moistened with ethanol or isopropyl alcohol, with the printer off. Epson suggests doing this about every three months.

CauseThe printer works, but the computer, tablet or POS app can't reach it.

Fix

1. Run a self-test: hold Feed while you switch the printer on. If it prints, the problem is the connection.
2. Check the Ethernet LED: steady means connected, flashing means still getting an IP address, off means no link.
3. Print a status sheet (open the cover, hold Feed for one second, close the cover, follow the "Next Action" guidance). Check that the IP address is in the same range as your device and enter it in your app or driver. On Windows, check the port as shown in our driver guide.
4. Check "Security Mode" on the status sheet. With "RED" (EU printers), Secure Printing is on by default and only encrypted network printing works: unencrypted jobs, such as raw printing on port 9100, don't print. Use RED-compatible Epson software, such as Epson Advanced Printer Driver 6 version 6.10 or later, and ask your POS app supplier whether their app supports it.

Secure Printing can be switched off in Web Config under Advanced Settings › Print › Secure Printing, with the administrator password ("Initial Password:" on the status sheet). Epson does not recommend this: it allows unencrypted communication and is only an option on a secure, managed network. Loyverse POS can't find the printer? Follow our Loyverse setup guide.

CauseC31CK50112 has no built-in radio: Wi-Fi needs the OT-WL06 unit, and Bluetooth needs the Wi-Fi + Bluetooth model.

Fix

1. Unplug the Ethernet cable. While it is connected, wireless LAN stays off.
2. Check that Wireless Chip Mode is set to Option Unit and the OT-WL06 is in the USB-A port.
3. Re-enter the network name and password, or reset the network settings (see the FAQ below) and start again.
4. Bluetooth model: print the status sheet and pair within one minute. Bluetooth is off while Option Unit mode is in use.

Full steps: Connect the TM-m30III to Wi-Fi or Bluetooth.