If you are managing or servicing an HP DesignJet T850, T850mfp, T950, or T950mfp Series Plotter, encountering a system error code can bring your workflow to a halt.
While some errors are simply "advisory" or "silent," others are "critical" and require immediate intervention. Often, the first and best step is to try restarting your printer to see if the error clears and to get a more accurate diagnostic. To help you quickly diagnose and resolve persistent issues, we have compiled the definitive troubleshooting tables below.
Table of Contents
Table 1: Silent Error Codes
Silent error codes help with specific troubleshooting. They are accessible only through the error log and don't directly appear in the front panel.
| System Error Code | Service Part | Error Cause |
|---|---|---|
| 0026-2175 | Ink Supply Station Ink Cartridge (K) | Generic Ink Supply failure. |
| 0026-2182 | Ink Supply Station Ink Cartridge (K) | IDS startup failure (long repumps). |
| 0026-2184 | Ink Supply Station Ink Cartridge (K) | IDS startup failure (delay phase). |
| 0026-2185 | Ink Supply Station Ink Cartridge (K) | PHA primed with empty supply. |
| 0026-2186 | Ink Supply Station Ink Cartridge (K) | IDS startup failure (cycling phase). |
| 0026-2187 | Ink Supply Station Ink Cartridge (K) | IDS startup failure (shaid not covered). |
| 0026-2190 | Ink Supply Station Ink Cartridge (K) | Cartridge Altered |
| 0026-2191 | Ink Supply Station Ink Cartridge (K) | Cartridge Out of ink |
| 0026-2192 | Ink Supply Station Ink Cartridge (K) | Ink Sensor detected unexpected OOI |
| 0026-2196 | Ink Supply Station Ink Cartridge (K) | Altered cartridge OOI |
| 0026-2275 | Ink Supply Station Ink Cartridge (C) | Generic Ink Supply failure. |
| 0026-2282 | Ink Supply Station Ink Cartridge (C) | IDS startup failure (long repumps). |
| 0026-2284 | Ink Supply Station Ink Cartridge (C) | IDS startup failure (delay phase). |
| 0026-2285 | Ink Supply Station Ink Cartridge (C) | PHA primed with empty supply. |
| 0026-2286 | Ink Supply Station Ink Cartridge (C) | IDS startup failure (cycling phase). |
| 0026-2287 | Ink Supply Station Ink Cartridge (C) | IDS startup failure (shaid not covered). |
| 0026-2290 | Ink Supply Station Ink Cartridge (C) | Cartridge Altered |
| 0026-2291 | Ink Supply Station Ink Cartridge (C) | Cartridge Out of ink |
| 0026-2292 | Ink Supply Station Ink Cartridge (C) | Ink Sensor detected unexpected OOI |
| 0026-2296 | Ink Supply Station Ink Cartridge (C) | Altered cartridge OOI |
| 0026-2375 | Ink Supply Station Ink Cartridge (M) | Generic Ink Supply failure. |
| 0026-2382 | Ink Supply Station Ink Cartridge (M) | IDS startup failure (long repumps). |
| 0026-2384 | Ink Supply Station Ink Cartridge (M) | IDS startup failure (delay phase). |
| 0026-2385 | Ink Supply Station Ink Cartridge (M) | PHA primed with empty supply. |
| 0026-2386 | Ink Supply Station Ink Cartridge (M) | IDS startup failure (cycling phase). |
| 0026-2387 | Ink Supply Station Ink Cartridge (M) | IDS startup failure (shaid not covered). |
| 0026-2390 | 27.00. Printhead | Cartridge Altered |
| 0026-2391 | Ink Supply Station Ink Cartridge (M) | Cartridge Out of ink |
| 0026-2392 | Ink Supply Station Ink Cartridge (M) | Ink Sensor detected unexpected OOI |
| 0026-2396 | Ink Supply Station Ink Cartridge (M) | Altered cartridge OOI |
| 0026-2475 | Ink Supply Station Ink Cartridge (Y) | Generic Ink Supply failure. |
| 0026-2482 | Ink Supply Station Ink Cartridge (Y) | IDS startup failure (long repumps). |
| 0026-2484 | Ink Supply Station Ink Cartridge (Y) | IDS startup failure (delay phase). |
| 0026-2485 | Ink Supply Station Ink Cartridge (Y) | PHA primed with empty supply |
| 0026-2486 | Ink Supply Station Ink Cartridge (Y) | IDS startup failure (cycling phase). |
| 0026-2487 | Ink Supply Station Ink Cartridge (Y) | IDS startup failure (shaid not covered). |
| 0026-2490 | Ink Supply Station Ink Cartridge (Y) | Cartridge Altered |
| 0026-2491 | Ink Supply Station Ink Cartridge (Y) | Cartridge Out of ink |
| 0026-2492 | Ink Supply Station Ink Cartridge (Y) | Ink Sensor detected unexpected OOI |
| 0026-2496 | Ink Supply Station Ink Cartridge (Y) | Altered cartridge OOI |
| 0027-0002 | Printhead Printhead | "PHA error: not responding at all" |
| 0027-0003 | Printhead Printhead | "PHA error: CSIO xfer completed incorrectly" |
| 0027-0004 | Printhead Printhead | "PHA error: Watchdog fault" |
| 0027-0014 | Printhead Printhead | "PHA error: TSR fault" |
| 0027-0016 | Printhead Printhead | "PHA error: Pen not heating" |
| 0027-0020 | Printhead Printhead | "PHA error: VPP short" |
| 0027-0021 | Printhead Printhead | "PHA error: VPP short" |
| 0027-0022 | Printhead Printhead | "PHA error: VPP short" |
| 0027-0023 | Printhead Printhead | "PHA error: VPP short" |
| 0027-0024 | Printhead Printhead | "PHA error: VPP short test" |
| 0027-0025 | Printhead Printhead | "PHA error: VPP short test" |
| 0027-0033 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0034 | Printhead Printhead | "PHA error: VPP check timeout" |
| 0027-0035 | Printhead Printhead | "PHA error: VDD check timeout" |
| 0027-0039 | Printhead Printhead | "PHA error: VDD too many ignored" |
| 0027-0040 | Printhead Printhead | "PHA error: VDD too many ignored" |
| 0027-0046 | Printhead Printhead | "PHA error: VPP on" |
| 0027-0047 | Printhead Printhead | "PHA error: VPP setpoint failed" |
| 0027-0049 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0050 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0051 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0053 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0054 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0055 | Printhead Printhead | "PHA error: VPP bleed failed" |
| 0027-0056 | Printhead Printhead | "PHA error: VPP expected on" |
| 0027-0059 | Printhead Printhead | "PHA error. missing" |
| 0027-0080 | Printhead Printhead | Printhead reseat required (IDS prime failed) |
| 0042-0059 | Carriage Carriage motor | Servo shutdown |
| 0043-0059 | Pick motor Pick motor | Servo shutdown |
| 0044-0059 | Feed Motor Feed motor | Servo shutdown |
| 0045-0059 | Rewinder Rewinder motor | Servo shutdown |
Table 2: Silent Error Codes with Front Panel Messages
Some front panel errors require operator intervention only (like paper jams). A SILENT system error code will be logged at the time the issue happened.
| System Error Code | Front Panel Message |
|---|---|
| 0042-0059 | Carriage jam. The print carriage cannot move. |
| 0043-0059 | Paper jam. There is a paper jam in the printer and the print job has been canceled. |
| 0044-0059 | Paper jam. There is a paper jam in the printer and the print job has been canceled. |
| 0045-0059 | Paper jam. There is a paper jam in the printer and the print job has been canceled. |
| 0024-1000 | An error occurred and the printhead start-up failed. Contact HP. Error code: 0x00241000. |
| 0024-1100 | The printhead has failed due to used cartridges installed during the startup process, and must be replaced. |
| 0027-0001 to 0027-0004 | The printhead appears to be missing, incorrectly installed or incompatible. |
| 0027-0016 to 0027-0025 | The printhead appears to be missing, incorrectly installed or incompatible. |
| 0027-0033 to 0027-0035 | The printhead appears to be missing, incorrectly installed or incompatible. |
| 0027-0046 to 0027-0060 | The printhead appears to be missing, incorrectly installed or incompatible. |
| 0027-0061 to 0027-0067 | [PH status change, not an error. No message in front panel] |
| 0027-0080 | Printhead problem. The printhead appears to be missing, not detected or incorrectly installed. |
Table 3: System Error Troubleshooting Details
Severe errors and the required diagnostics required to solve the problem.
| System Error | Problem Description | Associated Parts | Self Troubleshooting |
|---|---|---|---|
| 0000-0059 | Carriage or Paper jam. | Carriage motor, Paper motor | Follow error 0042-0117 for Carriage Jam or 0041-0017 for Paper Jam. |
| 0001-0082 | Battery or Real time clock ran down. | Main PCA | Switch power off, disconnect cord, reconnect and power on. If persists, call DPI for onsite support. |
| 0004-0001 | Bundle Board failure | Bundle FFC, Main PCA | Switch off/on. Call DPI for onsite support to change Bundle PCA if needed. |
| 0021-0017 | Service station move failure | Print Bundle PCA | Switch off. Check for paper blocking SVS. Call DPI for onsite support to change Service Station. |
| 0021-0060 | Service Station motor test failure | Print Bundle PCA | Switch off/on. Run "Test Service Station" diagnostics. |
| 0021-0062 | Service Station Electrical warm | Print Bundle PCA | Switch off, clear obstructions. Call DPI for onsite support if persists. |
| 0021-0180 | Prime pump air leakage | N/A | Switch off/on. Call DPI for onsite support to change Prime pump. |
| 0024-1000 | PHA startup failure | Supplies, primer system, encoder | Reboot and verify cartridges. Try a new HP supply. |
| 0024-1100 | Startup failure (altered supplies) | PHA | Try the process again with a new unused HP supply. |
| 0026-0061 | ISS motor stall / bad encoder | None | Restart unit. Run ISS Pump and home sensor test. Call DPI for onsite support. |
| 0026-2X75 | Generic Ink Supply failure. | None | Check cartridge presence. Remove, shake, and re-insert. Call DPI if persists. |
| 0026-2X83 | Opto trip failure | None | Switch off/on. Call DPI for onsite support to change ISS Ink Sensor. |
| 0027-00XX | PHA problem | Carriage PCA, Trailing Cable | Remove, clean and reseat PHA kit. Check latches. Arrange replacement if in warranty. |
| 0041-0017 | Paper Servo move failure | Encoder Disk, PCA | Switch off/on. Run Paper Servo diagnostic. |
| 0042-0059 | Carriage Motor Servo shutdown | None | Switch off/on. Run Test Carriage. |
| 0042-0060 | Carriage Motor Direction test | None | Switch off/on. Run Test Carriage. |
| 0042-0117 | Carriage Servo feedback failure | Motor, Belt, Strip | Switch off/on. Move carriage to check friction. Call DPI for support. |
| 0042-0162 | Carriage Motor Electrical warm | Main PCA | Switch off, clear carriage path. Check substrate weight. |
| 0043-0017 | Pick Servo move failure | None | N/A |
| 0043-0059 | Pick Motor Servo Shutdown | None | Switch off/on. Run Test Carriage. |
| 0043-0060 | Pick Motor Direction test | Pick motor, Bundle PCA | Switch off/on. Run Pick Motor test. |
| 0043-0062 | Pick Motor Electrical warm | Bundle PCA | Switch off, clear Pick Motor path. Check substrate weight. |
| 0044-0059 | Feed motor Servo shutdown | None | Check for paper jam. Run Paper Motor Test. |
| 0044-0060 | Feed motor Direction test | Main PCA | Switch off/on. Run Paper Motor Test. |
| 0044-0062 | Feed Motor Electrical warm | Main PCA | Switch off, clear Feed Motor path. Check substrate weight. |
| 0045-0017 | Rewind Servo feedback failure | Main PCA | Switch off/on. Boot unit without spindle after checking gears. |
| 0045-0059 | Rewinder Motor Servo shutdown | None | Switch off/on. Run Rewinder Motor test. |
| 0045-0060 | Rewinder motor Direction test | Main PCA | Switch off/on. Run Rewinder Motor test. |
| 0045-0062 | Rewinder Motor Electrical warm | Main PCA | Switch off, clear path obstructions. Check substrate weight. |
| 0059-0190 | NVM conflict | None | N/A |
| 0059-0191 | NVM default data found | None | N/A |
| 0059-0289 | NVM backup missing | Main PCA | Restart unit. |
| 0085-0101 | Feed index encoder failure | Encoder Disk, PCA | Switch off/on. Call DPI for onsite support to change Feed Index PCA. |
| 0085-0201 | Feed encoder sensor failure | Encoder Disk, PCA | Switch off/on. Call DPI to change Feed encoder sensor PCA. |
| 0087-0001 | Encoder Strip failure | Carriage Sensor | Switch off/on. Call DPI for onsite support to change Encoder Strip. |
| 0153-0302 | Sheet Tray not detected | MPCA | Remove Tray. Check if tray sensor physically exists. |
| 0942-0188 | Carriage homing problem | None | Reboot. Clean encoder strip. Check for paper blocking SVS. |
| 0955-0050 | Line sensor failure | Carriage PCA, Cable | Switch off/on. Run Line Sensor diagnostic. Call DPI for onsite support. |
