KONE traction elevators are equipped with a smart control system (LCE CPU). When something goes wrong, the system shows a fault code. These codes are stored in memory (up to 99 at a time) and help technicians find and fix problems quickly.
The latest fault always shows as F1.
In this guide, we explain the most common KONE fault codes, what they mean, and how to fix them.
KONE Elevator Fault Code Table
| Code | Fault Description | Cause | Elevator Status | How to Fix |
|---|---|---|---|---|
| 0001 | Drive timeout protection enabled | The motor ran longer than the software limit, but the car position sensor did not change | Stops immediately | Check the car‑top position sensor. Cut power and reset |
| 0004 | Three failed sync runs | During three sync runs, 77:U/N, 61:U/N, or 30 signals were wrong, so the position was not found | Stops at terminal | Check car‑top position sensors. Cut power and reset |
| 0007 | Door‑zone 30 (or B30) signal stays ON too long | After start, the 30 sensor stayed active; system did not see the car leaving the door zone | Doors open and car stops at that floor | Check door‑zone sensor. Cut power and reset |
| 0008 | NVRAM fault on LCE CPU | NVRAM size too small | — | Replace NVRAM |
| 0014 | ADO/ACL (advanced pre‑open) monitor circuit not released | In two runs in a row, contactors 486 / 443:1 / 443:2 did not release | Stops at a landing | Fix circuit; then power off and reset |
| 0015 | ADO/ACL monitor circuit not released | Same as above | Stops at a landing | Fix circuit; then power off and reset |
| Code | Fault Description | Cause | Elevator Status | How to Fix |
| 0021 | Safety circuit open | One or more safety contacts are open | Stops immediately | Find why the safety chain opened; fix and restore |
| 0022 | Landing door contact opened while running | Poor adjustment or someone opened a hall door | Stops immediately | Check landing doors |
| 0023 | Car door contact opened while running | Poor adjustment caused bad contact | Stops immediately | Check car doors |
| 0025 | Start‑permission signal fault | Main contactor did not release or has poor contact | Cannot start | Check main contactor and auxiliary contacts |
| 0026 | Drive system fault | Drive module fault; “V3F OK” LED is off | Cannot start | Check drive module and peripherals |
| 0036 | — | Not used | — | — |
| 0039 | 77:U/N temporary bridge button pressed | The U/N bridge button on LCE CPU was pressed | Cannot start | When button returns to normal, the car recovers |
| 0042 | Car lighting monitor | CPU detected no voltage in car‑light circuit | Cannot run fast speed | Check light circuit and fuses |
| 0044 | Door closing fault | After 5 tries, CPU did not see DOOR CONTACT or SHAFT DOOR CONTACT | Doors open and car stops at floor | Check car‑door and hall‑door contacts |
| 0048 | Re‑open protection held > 1 minute | Car door protection (light curtain/touch panel) was active too long | Doors stay open | Check light curtain/safety edge; remove obstacles |
| 0049 | Door closing took too long | Door close limit signal missing | After 5 tries to close, 0044 appears and doors open | Check door close limit; power off and reset |
| 0051 | Start failed | Wrong load setting, wrong drive parameters, or drive fault | After 5 start tries, doors open and car stops | Check load (weighing) setting, drive and parameters |
| 0052 | Top & bottom forced slowdown both active | 77:U and 77:N activated at same time | Stops immediately | Check magnets at top and bottom of shaft (position & polarity) |
| 0058 | No drive output within time | After drive command, car did not start within 100 s | System retries | Auto recovery |
| 0060 | “Pick‑up” signal lost while running | Control did not receive drive “pick‑up” signal | Car runs to terminal | Auto recovery |
| 0061 | Forced close time too long | Hall‑door system fault prevents closing | After four retries, 0044 also shows | Check door machine; clear obstructions |
| 0071 | Door‑zone 30 magnet fault | Magnet missing or sensor damaged | Stops at floor and cannot open | Check 30 magnet or sensor |
| 0072 | 61:U leveling sensor stuck | 61:U switch is stuck and cannot change state | Stops, returns to floor, tries to go to lowest floor; if fails, out of service | Check 61:U sensor |
| 0073 | 61:N magnet missing | 61:N magnet missing or sensor damaged | Same as above | Check 61:N magnet/sensor |
| 0074 | 61:N leveling sensor stuck | 61:N switch is stuck | Same as above | Check 61:N sensor |
| 0075 | 61:U magnet missing | 61:U magnet missing or sensor damaged | Same as above | Check 61:U magnet/sensor |
| 0076 | Door‑zone monitor not released while running | At least one of K486, K443:1, K443:2 stayed “safe released” | Car runs to target floor | Auto recovery |
| 0077 | Door‑open limit switch fault | Door open‑limit damaged; no “open‑at‑end” signal | After 15 s open, car tries to close | Check door open‑limit switch |
| 0078 | Car call button stuck | At least one car call cannot auto‑cancel within 60 s | Car does not react to car calls | Fix/replace the button (auto recovery after normal) |
| 0079 | Hall call button stuck | At least one hall call cannot auto‑cancel within 60 s | Car does not react to hall calls | Fix/replace the button (auto recovery after normal) |
| 0081 | Re‑leveling fault | 61U/61N overlap too small; cannot re‑level | Cannot level at that floor | Adjust overlap of leveling sensors |
| 0082 | Door‑zone monitor not released while running | At least one of K486, K443:1, K443:2 stayed “safe released” | Runs to target floor | Auto recovery |
| 0083 | Position lost | Car cannot know current position | Returns to terminal to find position | Auto recovery after terminal reached |
| 0084 | Door‑open limit switch fault | Open‑limit damaged; “open at end” stays ON | Stops | Check the open‑limit switch |
| 0085 | “Door open inhibit” active | On LCE CPU, the “no‑open” switch was not reset in normal run | Doors cannot open | Return the “no‑open” switch to normal |
| 0086 | Start‑permission signal stuck ON | Wiring/circuit issue | — | Check the “start‑permission” circuit against drawings |
| 0089 | DOM function failed | Optional function | — | — |
| 0145 | EBD function failed | Optional function | — | — |
| 0146 | EBD function failed | Optional function | — | — |
| 0150 | NTS short‑circuit switch fault | NTS short switch did not work when needed | Stops, returns to nearest floor, then to terminal | Check NTS switch position per drawings |
| 0151 | NTS switch error | NTS switch position changed | Stops, returns to nearest floor, then to terminal | Check NTS switch position per drawings |
| 0152 | NTS emergency stop fault | Shown together with 0150/0151 | — | — |
| 0165 | Door contact monitor active | Hall‑door or car‑door contact opened | Stops immediately | — |
| 0169 | Low emergency battery | LCE CCB found car‑top emergency battery low/bad | No emergency lighting | Replace the battery |
| 0170 | AC power failed | Building power issue | — | Check power supply |
| 0171 | 24V control power failed | Control power lost | — | Check power supply |
| 0172 | 24V car/shaft power problem | Car or shaft 24V issue | — | Check power supply |
| 0101 | Drive stopped | Drive detected a fault and stopped | — | Check other fault codes |
| 0102 | Motor overcurrent | Drive detected overcurrent | — | Check motor |
| 0103 | Brake resistor fault | Brake resistor damaged | — | Replace brake resistor |
| 0104 | Motor overheated | Motor thermistor triggered | — | — |
| 0106 | Inverter problem | VFD overheated | — | — |
| 0107 | Weighing device fault | Weighing device output wrong | — | Re‑adjust or replace the weighing device |
| 0108 | Motor or tacho fault | Tacho polarity wrong or balance issue | Cannot run | — |
| 0109 | Drive lost position | — | Returns to terminal to find position; then recovers | — |
| 0110 | Brake resistor thermal switch tripped | Brake resistor too hot | Out of service | — |
| 0111 | 61:N magnet is under 61:U | Leveling magnets/sensors mis‑placed | — | Move 61:N relative to 61:U |
| 0112 | 61:N overlap under 61:U too small | Overlap distance too small | — | Adjust overlap per drawings |
| 0113 | 77:S sync switch fault | 77:S switch fault | — | Check/replace 77:S |
| 0114 | Floor‑to‑floor distance too small | Distance between adjacent floors is less than minimum | — | Check leveling magnets distance |
| 0115 | TACHO scaling/problem | Wrong TACHO voltage setting causes wrong speed during shaft setup | — | Correct TACHO setting |
| 0116 | Floor counting error | Displayed floors do not match reality | — | Re‑do shaft setup |
| 0125 | Torque over limit | — | Stops and cannot start | — |
| 0126 | Safety contactor open | — | Cannot run | — |
| 0127 | Main contactor fault | Main contactor did not respond in time | Stops; cannot start | — |
| 0128 | Weighing device not set | Load setting missing | — | Do weighing setup |
| 1101 | LCE CCB (car‑top connection board) fault | Board damaged or wiring error | — | Check/replace LCE CCB |
| 1201 | COP 1st extension board fault | LCE CEB damaged or jumpers wrong | — | Check jumpers or replace LCE CEB |
| 1202 | COP 2nd extension board fault | LCE CEB damaged or jumpers wrong | — | Check jumpers or replace LCE CEB |
| 120n | COP n‑th extension board fault | LCE CEB damaged or jumpers wrong | — | Check jumpers or replace LCE CEB |
| 2201 | B‑side COP 1st extension board fault | LCE CEB damaged or jumpers wrong | — | Check jumpers or replace LCE CEB |
| 2202 | B‑side COP 2nd extension board fault | LCE CEB damaged or jumpers wrong | — | Check jumpers or replace LCE CEB |
| 220n | B‑side COP n‑th extension board fault | LCE CEB damaged or jumpers wrong | — | Check jumpers or replace LCE CEB |
| 1301 | A‑side LCE COB (car operating board) fault | Board damaged or power fault | — | Check power or replace LCE COB |
| 2301 | B‑side LCE COB fault | Board damaged or power fault | — | Check power or replace LCE COB |
| 1401 | 1st landing board fault (top‑down order) | Board damaged, jumper wrong, or wiring issue | — | Check/replace; fix jumpers/wiring |
| 1402 | 2nd landing board fault | Board damaged, jumper wrong, or wiring issue | — | Check/replace; fix jumpers/wiring |
| 140n | n‑th landing board fault | Board damaged, jumper wrong, or wiring issue | — | Check/replace; fix jumpers/wiring |
| 2401 | B‑side 1st landing board fault (top‑down order) | Board damaged, jumper wrong, or wiring issue | — | Check/replace; fix jumpers/wiring |
| 2402 | B‑side 2nd landing board fault | Board damaged, jumper wrong, or wiring issue | — | Check/replace; fix jumpers/wiring |
| 240n | B‑side n‑th landing board fault | Board damaged, jumper wrong, or wiring issue | — | Check/replace; fix jumpers/wiring |
| 1601 | LCE GTW (group control interface) board fault | Board damaged | — | Replace |
| Code | Fault Description | Cause | Elevator Status | How to Fix |
| 3501 | 1st display board damaged | — | — | Replace |
| 3502 | 2nd display board damaged | — | — | Replace |
| 350n | n‑th display board damaged | — | — | Replace |
