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Zerowatt • Central Diagnostic Dictionary
176 Verified Codes in Database

Zerowatt Error Codes & Diagnostics

Access our premium database of error codes, common faults, and professional repair solutions for Zerowatt appliances.

Luxury front-loading washing machine in brushed titanium with illuminated dark glass drum
CodeAppliancesFault / DiagnosticsRepair InstructionsAction
E09
Tumble Dryer
Drive Motor, Inverter & Tachometer Sensor

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Drum motor drive semiconductor failure E09; motor triac shorted or direction reversing relay contacts burned on control PCB.

On Zerowatt tumble dryers utilizing ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Heavy drum overload inducing high stall current, inductive voltage spikes from motor reversing, or PCB component fatigue.

Inspect control PCB for burned traces or cracked solder joints around motor relays. Test triac anode-cathode resistance with multimeter (must not be 0 Ω). Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E09
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Motor drive electronic fault E09; power board detects shorted motor triac or inverter IGBT phase breakdown.

On Zerowatt washing machines featuring integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Motor overload, carbon brush sparking surge, shorted stator windings, or thermal fatigue of semiconductor junction.

Inspect motor carbon brushes (replace if length <15 mm). Test motor windings for insulation breakdown to ground (>10 MΩ). Replace power module if triac is shorted. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E9
Dishwasher
Drainage System & Drain Pump

Zerowatt ZD / Space / CompactLine Dishwasher: Turbidity optical sensor fault E9; infrared soil sensing system fails calibration during pre-wash evaluation.

On Zerowatt dishwashers featuring CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Grease film coating optical lenses in sump, disconnected sensor plug, or burned infrared transmitter LED.

Clean optical turbidity sensor prism inside sump using soft cloth and degreaser. Check 5V DC power supply on sensor connector pins. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E9
Hob / Cooktop
Heating Element, Thermostat & Safety Fuse

Zerowatt ZH Induction & Vitroceramic Cooktop: Internal bus communication failure E9; touch control panel loses data communication with induction power module.

On Zerowatt cooktops powered by ZH induction & vitroceramic heating elements, bi-metallic energy regulator controls, and residual heat indicators: Disconnected or pinched data ribbon cable, oxidized pin terminals, or power supply failure on induction board.

Inspect internal communication cable between touch panel and generator board. Reseat both ends firmly and verify low-voltage DC rails. Wipe glass dry, switch off the hob fuse breaker for 30 seconds, restore circuit and hold Key Symbol for 4 seconds.

Diagnose
E9
Refrigerator / Freezer
Refrigeration Compressor, Defrost Heater & PTC Relay

Zerowatt ZR / FrostFree Combi Refrigerator: High temperature warming warning E9; fresh food compartment temperature exceeds +12°C continuously for over 2 hours.

On Zerowatt refrigeration units featuring ZR FrostFree cooling circuit, mechanical thermostat / NTC temperature regulation, and hermetic compressor: Incomplete door seal contact, defective magnetic reed switch, or prolonged door ajar state.

Check door gasket alignment using paper slip test. Test magnetic reed switch continuity with magnet near hinge. Seal leaks and clear alarm: Hold Temperature button for 10 seconds until the interior cabinet light blinks three times signaling microprocessor reset.

Diagnose
E10
Dishwasher
Drainage System & Drain Pump

Zerowatt ZD / Space / CompactLine Dishwasher: Water diverter valve timeout E10; motorized spray arm alternator disc fails to reach requested position microswitch contact.

On Zerowatt dishwashers utilizing CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Jammed ceramic disc in diverter body, open synchronous drive motor winding (~4–9 kΩ), or defective microswitch.

Measure synchronous motor winding resistance (~4–9 kΩ). Verify cam microswitch continuity when actuated. Inspect diverter disc for foreign matter. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E10
Tumble Dryer
Door Lock Mechanism & Safety Interlock

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Moisture sensing conductivity circuit error E10; sensor bars in door opening read open circuit or shorted to chassis ground.

On Zerowatt tumble dryers powered by ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Insulating fabric softener residue coating the stainless steel sensor strips, disconnected lead, or grounded wire.

Clean both stainless steel moisture sensor bars below door seal with vinegar and cloth to remove wax film. Check sensor wire continuity to PCB. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E10
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Program selector / drum position sensor error E10; dial input signal unrecognized or top-loader drum positioning sensor missing.

On Zerowatt washing machines utilizing integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Oxidized rotary selector contacts, misaligned reed/Hall drum position sensor, or disconnected harness.

Clean rotary switch contacts with contact cleaner. On top-loaders, verify drum magnet alignment with Hall sensor on tub outer shell. Check continuity. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E11
Tumble Dryer
Heating Element, Thermostat & Safety Fuse

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Exhaust air temperature overheat E11; air temperature leaving the drum exceeds 80°C triggering thermal protection.

On Zerowatt tumble dryers utilizing ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Heavily choked condenser unit, clogged exhaust ductwork, or blocked rear air intake grille behind machine.

Allow appliance to cool for 30 minutes. Remove and wash heat exchanger condenser. Test safety thermostat continuity with a multimeter. Ensure machine has minimum 10 cm rear clearance from wall. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E11
Washing Machine
NTC Temperature Sensor & Thermistor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Washer-dryer drying heating fault E11; air heating duct fails to reach temperature or dryer thermistor open circuit.

On Zerowatt washer-dryers with integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Tripped manual reset safety thermostat (Klixon), burned drying heating element (~25–35 Ω), or defective duct NTC (~20 kΩ).

Check Klixon push-button on top of drying duct. Measure drying element resistance (~25–35 Ω). Test drying duct NTC sensor (~20 kΩ at 25°C). Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E12
Dishwasher
Drainage System & Drain Pump

Zerowatt ZD / Space / CompactLine Dishwasher: Software sequence logic fault E12; program execution controller detects an illegal cycle state or memory jump.

On Zerowatt dishwashers powered by CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Mains supply noise surge, defective microcontroller clock crystal, or corrupted program ROM memory bank.

Perform full power reset by unplugging unit for 15 minutes. Verify line filter capacitor health. If error reappears immediately, replace control board. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E12
Tumble Dryer
Electronic Control Board (PCB) & Bus Communications

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Serial communication timeout E12; display console fails to exchange data telegrams with main chassis power board.

On Zerowatt tumble dryers powered by ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Disconnected or pinched data ribbon cable, corroded edge connectors, or damaged low-voltage DC power supply on board.

Inspect wiring harness connecting display module to power PCB. Reseat connectors and check pin continuity. Test 5V DC and 12V DC test pads. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E12
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Washer-dryer ventilation error E12; air circulation blower motor stall or drying auxiliary controller communication loss.

On Zerowatt washer-dryers with integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Fluff build-up jamming centrifugal fan impeller, open fan motor winding (~60–120 Ω), or defective drying PCB.

Dismantle drying duct assembly and clear lint obstructions from impeller. Measure fan motor winding (~60–120 Ω). Verify power supply plug. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E13
Tumble Dryer
General System & Mechanical Integration

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Condensate collection container full alert E13; water reservoir float switch trips and halts program execution.

On Zerowatt tumble dryers utilizing ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Water container completely filled with extracted condensate, stuck microswitch lever, or slime coating the float.

Empty condensate drawer completely and re-insert firmly until it clicks. If code persists empty, clean sump float switch chamber in lower rear. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E13
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Bus communication fault E13; user interface display panel loses serial handshake with main chassis power board.

On Zerowatt washing machines featuring integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Corroded ribbon cable edge connectors, electrical noise spikes, or defective 5V DC low-voltage rail on main board.

Inspect wiring harness between display and main power board for continuity and terminal crimp tension. Verify 5V DC and 12V DC test points on power PCB. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E14
Dishwasher
Water Level Pressure Switch & Air Dome

Zerowatt ZD / Space / CompactLine Dishwasher: Flowmeter signal missing during fill E14; pressure switch senses water rising in tub but zero flowmeter impulses arrive at PCB.

On Zerowatt dishwashers featuring CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Jammed impeller wheel in side air-break matrix, disconnected reed switch sensor board, or broken wire harness.

Inspect flowmeter connector at left side water jacket. Test reed switch closing action with small magnet and ohmmeter. Replace sensor circuit board. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E14
Tumble Dryer
Drive Motor, Inverter & Tachometer Sensor

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Condensate lift pump motor fault E14; pump fails to lift water from bottom collector to upper reservoir.

On Zerowatt tumble dryers powered by ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Open pump motor winding (~120–280 Ω), lint slime seizing impeller shaft, or pinched transfer hose.

Access lower rear pump compartment. Clean lint residue from impeller chamber. Measure lift pump motor winding resistance (~120–280 Ω). Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E14
Washing Machine
Heating Element, Thermostat & Safety Fuse

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Wash water heating failure E14; water temperature does not rise after 20 minutes of active wash program operation.

On Zerowatt washing machines powered by integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Open wash heating element (~25–30 Ω), desoldered heater relay on main PCB, or thermal fuse blown.

Disconnect element terminals. Measure heater resistance across element pins (nominal ~25–30 Ω). Inspect heater relay contacts for pitting on power PCB. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E15
Dishwasher
Water Level Pressure Switch & Air Dome

Zerowatt ZD / Space / CompactLine Dishwasher: Spray arm rotation / water pressure discrepancy E15; dynamic wash hydraulic pressure falls below operational threshold.

On Zerowatt dishwashers powered by CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Blocked spray arm nozzles, excessive foam from incorrect detergent, or low water level from partial siphonage.

Unclip upper and lower spray arms and clear lime/debris from all jet holes. If excessive suds present, run cold rinse cycle without detergent. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E15
Tumble Dryer
Drive Motor, Inverter & Tachometer Sensor

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Inverter compressor driver fault E15; heat-pump variable speed compressor trips on overcurrent or locked rotor protection.

On Zerowatt tumble dryers utilizing ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Low suction refrigerant pressure causing compressor piston seizure, defective inverter board, or shorted BLDC windings (~5–15 Ω).

Disconnect compressor plug. Measure resistance between all 3 compressor pins (must be balanced ~5–15 Ω phase-to-phase). Test insulation to ground (>10 MΩ). Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E15
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Microcontroller memory failure E15; main control module detects an invalid EEPROM checksum or unconfigured firmware parameter.

On Zerowatt washing machines featuring integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: AC mains voltage transient surge, corrupted non-volatile memory cell, or replacement blank module installed.

Attempt hard power cycle by removing mains plug for 10 minutes. If error returns, re-program configuration code or replace pre-programmed control module. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E16
Dishwasher
Drainage System & Drain Pump

Zerowatt ZD / Space / CompactLine Dishwasher: Water softener regeneration valve fault E16; salt chamber regeneration solenoid open-circuit or shorted on power board.

On Zerowatt dishwashers featuring CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Open solenoid coil on water softener matrix (~2.0–3.5 kΩ), corroded spade terminals, or shorted driver triac on PCB.

Gain access to salt reservoir assembly underneath sump. Measure regeneration valve solenoid resistance (~2.0–3.5 kΩ). Inspect wiring terminals. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E16
Tumble Dryer
General System & Mechanical Integration

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Heat pump evaporator coil freezing alert E16; evaporator temperature drops below -5°C during active drying cycle.

On Zerowatt tumble dryers powered by ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Blocked airflow starving evaporator of warm air, low refrigerant charge (gas leak), or defective capillary tube.

Clean all filters and condenser package completely to restore full process airflow. If evaporator remains iced with clean airflow, professional refrigeration service is required. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E16
Washing Machine
Heating Element, Thermostat & Safety Fuse

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Heating element earth insulation leak E16; appliance trips residual current device (RCD / breaker) or detects stray current to chassis ground.

On Zerowatt washing machines powered by integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Micro-cracked stainless steel element sheath allowing wash water into magnesium oxide core (>1 mA leakage).

Measure element insulation resistance with 500V megohmmeter between terminal pins and earth grounding tab (nominal >10 MΩ; replace if <2 MΩ). Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E17
Dishwasher
Drainage System & Drain Pump

Zerowatt ZD / Space / CompactLine Dishwasher: High water inlet flow / pressure fault E17; flowmeter impeller velocity exceeds maximum rate (>15 bar surge).

On Zerowatt dishwashers utilizing CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Mains supply water hammer pressure spike, missing flow restrictor inside inlet valve, or defective flowmeter transducer.

Partially close water tap valve to regulate inlet flow rate. Install water pressure regulator if line pressure exceeds 10 bar. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E17
Tumble Dryer
Drive Motor, Inverter & Tachometer Sensor

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Drum drive belt breakage detected E17; tensioner pulley safety microswitch opens when belt tension is lost.

On Zerowatt tumble dryers utilizing ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Snapped poly-V drive belt, broken tensioner return spring, or dislodged belt pulley bearing.

Remove side panel or top lid. Fit new OEM drive belt around drum and motor spindle. Route belt correctly through tensioner idler pulley. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E17
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: Motor speed signal frequency anomaly E17; tachometer pulse cadence does not match inverter drive excitation frequency.

On Zerowatt washing machines featuring integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Slipping drive belt, worn motor shaft bearings, loose rotor pole sensor, or defective inverter driver IC.

Check poly-V drive belt tension (replace if stretched or glazed). Spin drum manually to test bearing drag. Check tachometer signal waveform with oscilloscope. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
E18
Dishwasher
Water Level Pressure Switch & Air Dome

Zerowatt ZD / Space / CompactLine Dishwasher: Low water level during circulation E18; circulation wash pump sucks air pockets causing cavitation and pressure loss.

On Zerowatt dishwashers powered by CompactLine hydraulic wash circuit, mechanical water pressure regulation, and micro-switch anti-flood float protection: Upside-down pots trapping excessive wash water, partial siphoning through low drain hose, or foaming detergent.

Arrange hollow dishes so they drain freely. Ensure drain hose loop is at least 65 cm above floor. Pour 2 liters of water in tub and reset. Hold Start button for 5 seconds until the program run LED stops blinking, close the door to complete drain, then power off.

Diagnose
E18
Tumble Dryer
General System & Mechanical Integration

Zerowatt ZTD Condenser & Heat-Pump Tumble Dryer: Power supply voltage or frequency fault E18; AC mains input deviates outside allowable 190V–255V operating window.

On Zerowatt tumble dryers powered by ZTD condensation airflow duct system, bi-metal safety thermal cut-out, and electromechanical program timer: Mains line voltage drop under heavy household load, generator frequency variation, or worn filter capacitors.

Verify wall socket voltage with multimeter under active load (must be 230V ±10%). Do not operate dryer on light-gauge extension cables. Rotate dial to Off, press Start and Low Heat buttons for 5 seconds until the buzzer chirps twice, then release and turn to Off.

Diagnose
E18
Washing Machine
Drive Motor, Inverter & Tachometer Sensor

Zerowatt SpazioTop / LadyPiù / Optima Washing Machine: AC mains power supply out of limits E18; voltage fluctuates outside 185V–260V AC or frequency deviates from 50/60 Hz.

On Zerowatt washing machines utilizing integrated GIAS Invensys circuit architecture, electronic commutator drive motor, and mechanical pressure calibration: Heavy grid brownout, electrical generator distortion, loose wall outlet wiring, or worn power PCB filtering capacitors.

Measure line voltage and frequency at wall receptacle using multimeter under load (must be 230V ±10%, 50/60 Hz). Avoid multi-gang extension leads. Turn dial to Off, hold Start/Pause and Spin speed buttons together for 5 seconds until the status lamps pulse, then power cycle.

Diagnose
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Zerowatt — Complete Error Code Catalog

88 Verified Error Codes

Server-side index of all verified manufacturer error codes for technicians and automated crawlers.

Dishwasher32

AL03AL05E01E1E02E2E03E3E04E4E05E5E06E6E07E7E08E8E9E10E12E14E15E16E17E18EdEFEhELi20i30

Washing Machine8

CLrE20E22FAFC0FC1FC2Unb

Tumble Dryer10

E09E11E13E21F1F2F3F4F5F6

Oven / Microwave25

Er01Er02Er03Er04Er05Er06Er07Er08Er09Er15Er20Er21Er22Er31Er36Er47Er56F01F02F03F04F08LocSabbSTOP

Hob / Cooktop9

E0FF0F7F8F9HLU

Refrigerator / Freezer4

AL01AL02EAEr

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