Printer Not Printing Receipts — What to Do
Printer Not Printing Receipts — What to Do
Section titled “Printer Not Printing Receipts — What to Do”Symptom: after a payment or at the administrator’s request, no receipt comes out — no sound, no paper movement.
When This Happens
Section titled “When This Happens”- USB cable unplugged or damaged
- Paper ran out or is loaded incorrectly
- Wrong port or printer model selected in IZI settings
- Printer driver failed after a Windows update
- Printer hung — needs a reboot
- For fiscal printers: no connection to the fiscal data operator (OFD) server, or fiscal storage error
Quick Checks — Under 5 Minutes
Section titled “Quick Checks — Under 5 Minutes”-
Printer indicators — is the power button lit? Blinking orange/red indicator = error (paper, cover, overheat).
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Paper — open the printer cover. The roll must be loaded with the heat-sensitive side facing out (toward the print head). If the roll is ending — replace it.
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USB cable — disconnect and reconnect the cable at both ends. Try a different USB port on the computer.
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Test page — on most receipt printers: hold the paper feed button while powering on. If the test printed — the printer works; the problem is in IZI settings.
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Check the port in IZI — open Settings → Hardware → Receipt Printer. Confirm the correct COM port or IP address is selected.
If That Doesn’t Help — Go Deeper
Section titled “If That Doesn’t Help — Go Deeper”Reboot the Printer
Section titled “Reboot the Printer”- Power off the printer using the power button
- Wait 10 seconds
- Power back on
- Wait for full initialization (indicator is steady, no blinking)
- Try printing a test receipt from IZI
Check Printer Settings in IZI
Section titled “Check Printer Settings in IZI”- Open Settings → Hardware
- Find the Receipt Printer section
- Verify:
- Printer model is correctly selected
- Port is correct (COM1/COM2 for USB-COM adapters, or IP for network printers)
- Click Test Print — IZI will send a test command to the printer
If the port changed (typical after a Windows update or USB port change): open Windows Device Manager → Ports (COM & LPT) → find the printer and note the port number.
Reinstall the Driver
Section titled “Reinstall the Driver”If the printer doesn’t appear in the system or the port isn’t detected:
- Download the driver from the printer manufacturer’s website
- Remove the current driver via Device Manager (right-click → Uninstall device)
- Install the downloaded driver
- Restart the computer
- Reconfigure the printer in IZI
Fiscal Printer: Specific Errors
Section titled “Fiscal Printer: Specific Errors”If using a fiscal printer (fiscal cash register):
| Symptom | Likely Cause | Action |
|---|---|---|
| Printer can’t connect to fiscal data operator | No internet or port blocked | Check network, ensure port 443 is open |
| Fiscal storage error | Storage is full or defective | Contact your fiscal data operator service |
| ”Shift not open” when printing a receipt | Cash register shift not opened on the fiscal printer | Open the shift on the fiscal printer |
| Receipt not transmitted to fiscal data operator | Accumulated receipts waiting to send | Wait for connection to be restored — fiscal storage holds receipts for up to 30 days |
For fiscal printer operation without internet: the fiscal storage saves receipts internally and transmits them to the fiscal data operator when the connection is restored. Receipt printing for clients continues normally.
Prevention
Section titled “Prevention”- Use thermal paper of the recommended width (usually 58mm or 80mm) — the wrong roll jams.
- Keep a paper supply — running out mid-shift causes issues with clients and reporting.
- Clean the print head once a month — accumulated dust degrades print quality.
- Don’t connect the printer through a USB hub — direct connection to the PC is more reliable.
See Also
Section titled “See Also”Frequently asked questions
Printer used to work, stopped after Windows update — why?
Windows updates sometimes reinstall drivers or change the COM/USB port number. Go to Settings → Hardware → Receipt Printer in IZI and check whether the correct port is selected. If the port changed — select the right one and save.
Printer indicator is green but receipt doesn't come out — what is this?
Printer is powered on and shows no error, but the job isn't reaching it. Check the USB cable and port in IZI settings. Also try the test print directly from the printer's system menu — if that works, the problem is in CRM settings.
Printer prints garbled characters instead of text — how to fix?
Most likely incorrect encoding or font in settings. Check Settings → Hardware → Receipt Printer and ensure the correct printer model is selected — this affects formatting commands.
Can a receipt be reprinted?
Yes. Open the transaction in the Transactions section → Print Receipt button. Reprint is available for any completed transaction.
Printer works in other apps but not in IZI — what to do?
IZI communicates with the printer directly via the RAW protocol, not the standard Windows driver. Ensure the correct printer model and correct port/IP are selected in IZI settings.