Hilti Cordless Vacuums Error Codes

BAT-HOT

Battery temperature icon appears; vacuum will not run until cooled

Battery Overtemperature Protection

BAT-LOW

Battery icon flashes and vacuum stops; no other error code shown

Low Battery Voltage Cutoff

E1

Cordless vacuum will not power on; display briefly flashes then turns off

Undervoltage / Battery Protection Triggered

E10

Vacuum LEDs flash in a pattern corresponding to E10; tool unresponsive to trigger

User Interface / Switch Circuit Fault

E2

Cordless vacuum stops shortly after starting; display shows E2 or two-blink fault pattern

Overcurrent / Motor Overload Protection

E3

Vacuum shuts down after a few seconds of operation; error E3 or triple-blink LED pattern

Motor Overtemperature Protection

E4

Vacuum does not start; LEDs indicate fault E4; battery works fine on other Hilti tools

Electronics / Control PCB Failure

E5

Vacuum runs only at low power or surges; error E5 appears intermittently

Motor Speed Control / Hall Sensor Fault

E6

Vacuum will not start with certain batteries; E6 or battery symbol flashes

Battery Communication / Compatibility Error

E7

Vacuum stops and shows E7 when used in very dusty environments

Dust Sensor / Filter Monitoring Fault (if equipped)

E8

Vacuum will not start; E8 displayed after suspected liquid ingress

Moisture / Short-Circuit Protection

E9

Vacuum runs but then shuts off with E9 when using high-power mode

Overload / Power Stage Fault

FILTER

Filter warning icon illuminated; suction reduced

Filter Clogged / Restricted Airflow

LED-BLINK-2

Status LED blinks twice repeatedly; vacuum does not start

Short Circuit Detected at Motor Output

LED-BLINK-3

Status LED blinks three times repeatedly; vacuum starts then stops

Motor Stall / Rotor Blocked

Symptom

Battery drains unusually fast when using the vacuum

Excessive Current Draw / Reduced Battery Capacity

Symptom

Excessive vibration felt in handle and housing while vacuum is running

Fan Imbalance / Loose Components

Symptom

Hose keeps disconnecting from vacuum or tools during use

Worn Hose Coupling / Locking Mechanism

Symptom

On/off switch feels loose or does not click; vacuum only starts intermittently

Mechanical Switch Wear

Symptom

Static shocks felt when touching vacuum or hose during operation

Static Electricity Build-Up

Symptom

Strong burning smell from vacuum during or after use

Motor Overheating / Electrical Insulation Breakdown

Symptom

Vacuum body or handle becomes excessively hot to the touch during normal use

Overheating Due to Restricted Cooling

Symptom

Vacuum cannot be mounted or clipped to Hilti tools or accessories as before

Broken Mounting Clip / Interface

Symptom

Vacuum does not turn on at all; no lights, no sound, even with charged battery

Complete Power Loss

Symptom

Vacuum emits unusual rattling noise from inside container

Loose Internal Components / Debris

Symptom

Vacuum leaves fine dust haze in the air; filtration seems poor

Insufficient Filtration / Wrong Filter Type

Symptom

Vacuum makes loud grinding or screeching noise during operation

Worn Motor Bearings / Fan Damage

Symptom

Vacuum performance drops significantly when using long hose or multiple accessories

Excessive System Resistance

Symptom

Vacuum runs but dust escapes from around the lid or filter area

Seal Failure / Filter Bypass

Symptom

Vacuum runs but has very weak suction even with clean filter

Airflow Loss / Internal Leak

Symptom

Vacuum runs only at one speed; power selector has no effect

Speed Control Failure

Symptom

Vacuum shuts off randomly during use without any error indication

Intermittent Power Loss

Symptom

Vacuum trigger or switch area gets dusty inside clear cover (if equipped)

Ingress of Dust into Control Area

Symptom

Vacuum will not latch or close properly; lid pops open during use

Container Latch / Hinge Failure

Symptom

Vacuum will not stand or store properly; base feels unstable

Damaged Base / Support Feet