OEM VERIFIED BENCH

OFFICIAL FAULT CODEPU

Airlux // OFFICIAL DIAGNOSTIC BENCH

Airlux PU

Air ConditionerDrive Motor, Inverter & Tachometer Sensor

Luxury front-loading washing machine in brushed titanium with illuminated dark glass drum

Air Conditioner

Other Brands Sharing Code PU:Gree / MacePU

Symptom / Description

FAULT

Capacitor charge malfunction

TELEMETRY // LIVESIG: FAULT_DETECTED

Root Cause

ROOT CAUSE

Defective 3-Phase Motor Windings / Tacho Generator / Carbon Brushes, open/short circuit in the wiring harness, or faulty connector on the drive motor, inverter & tachometer sensor.

CIRCUIT // SUBSYSTEMLOGIC: ROOT_ISOLATED

Repair Instructions

UNLOCKED

1Check inverter board capacitor and charging circuit.

AI diagnostic workshop engine analyzing appliance circuit schematics and error telemetry in real time

AI WORKSHOP PROTOCOL ENGINE

Direct extraction from OEM factory manuals & wiring schematics

Field Actions

DISPATCH

Need Help? Call a Certified Technician Worldwide Airlux Parts Finder

Electrical & Safety Protocol

Always disconnect appliance from 230V/400V mains before opening panels. Use CAT III multimeter for circuit testing.

CALIBRATED BENCH PROTOCOL // CAT III 600V

Workshop Verification & Safety Checklist

WORKSHOP VERIFICATION PROTOCOLDrive Motor, Inverter & Tachometer SensorAir Conditioner / Heat Pump

2. Multimeter & Electrical Bench Tests (Ω)

MODE: OHMMETER (Ω)AUTO-RANGE

Precision digital multimeter probes measuring electrical resistance in Ohms on an appliance control board

CALIBRATED METROLOGY RESISTANCE BENCH (CAT III)

Nominal Resistance (Ω)

3Ω–6Ω (BLDC phase U-V-W) / 60Ω–180Ω (Tacho coil) / 1.5Ω–3.5Ω (Universal stator)NOMINAL

0 Ω (SHORT)CALIBRATED BAND∞ OL (OPEN)

▲ NOMINAL OPERATING WINDOW

Target Component:3-Phase Motor Windings / Tacho Generator / Carbon Brushes

Test Pins & Connections

PROBE (+)

PROBE (-)

Across phase pins U-V, V-W, U-W on motor harness; across tacho pins

Tolerance & Diagnostic CriteriaBLDC phase winding values must be strictly balanced within ±0.3Ω. Hand rotation generates 1V–4V AC on tacho.

1. Pre-Intervention Electrical Safety Protocols

!High-Voltage Safety Protocol & DC Bus: Wait at least 5 minutes after power cutoff to allow inverter DC bus capacitors (380V DC) to bleed down.
!Verify 0V DC across inverter filter capacitors before unplugging motor harness connectors.
!Keep hands clear of drive belt and pulleys during any manual rotation tng.

3. Preliminary Mechanical & Visual Checks

Slip off drive belt and spin drum/motor shaft by hand to check for roaring or seized ball bearings.
For universal motors: verify carbon brushes have at least 10mm remaining length and smooth contact faces.
Inspect motor suspension rubber mounts and drive belt tension/groove profile.

Perform these diagnostic steps before triggering AI Deep Search or replacing boards.Certified Workshop Routine

Frequently Asked Questions: Airlux PU

FAQ TREE

What does error code PU mean on a Airlux appliance?

Airlux error code PU indicates: Capacitor charge malfunction.

What is the root cause of Airlux error code PU?

The primary root cause for Airlux code PU is: Defective 3-Phase Motor Windings / Tacho Generator / Carbon Brushes, open/short circuit in the wiring harness, or faulty connector on the drive motor, inverter & tachometer sensor..

How do I fix or resolve Airlux error code PU?

To resolve error code PU: Check inverter board capacitor and charging circuit.

Is it safe to clear Airlux error code PU by resetting power?

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Airlux code PU persists, the physical component causing Defective 3-Phase Motor Windings / Tacho Generator / Carbon Brushes, open/short circuit in the wiring harness, or faulty connector on the drive motor, inverter & tachometer sensor. must be inspected or replaced.

How do I test electrical resistance for Airlux code PU using a multimeter?

Set a digital multimeter to ohms (Ω). Disconnect power and test 3-Phase Motor Windings / Tacho Generator / Carbon Brushes across Across phase pins U-V, V-W, U-W on motor harness; across tacho pins. Expected nominal reading is 3Ω–6Ω (BLDC phase U-V-W) / 60Ω–180Ω (Tacho coil) / 1.5Ω–3.5Ω (Universal stator). Tolerance: BLDC phase winding values must be strictly balanced within ±0.3Ω. Hand rotation generates 1V–4V AC on tacho..

What safety protocol must be followed before servicing Airlux code PU?

Standard electrical safety protocol: 1. Disconnect 230V mains power before opening panels. 2. Verify zero voltage at test points. 3. Allow hot water or heating elements to cool below 30°C before handling.

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COMMUNITY

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OEM VERIFIED BENCH

OFFICIAL FAULT CODEPU

Airlux // OFFICIAL DIAGNOSTIC BENCH

Airlux PU

Air ConditionerDrive Motor, Inverter & Tachometer Sensor

Air Conditioner

Other Brands Sharing Code PU:Gree / MacePU

Symptom / Description

FAULT

Capacitor charge malfunction

TELEMETRY // LIVESIG: FAULT_DETECTED

Root Cause

ROOT CAUSE

Defective 3-Phase Motor Windings / Tacho Generator / Carbon Brushes, open/short circuit in the wiring harness, or faulty connector on the drive motor, inverter & tachometer sensor.

CIRCUIT // SUBSYSTEMLOGIC: ROOT_ISOLATED

Repair Instructions

UNLOCKED

1Check inverter board capacitor and charging circuit.

AI WORKSHOP PROTOCOL ENGINE

Direct extraction from OEM factory manuals & wiring schematics

Field Actions

DISPATCH

Need Help? Call a Certified Technician Worldwide Airlux Parts Finder

Electrical & Safety Protocol

Always disconnect appliance from 230V/400V mains before opening panels. Use CAT III multimeter for circuit testing.

CALIBRATED BENCH PROTOCOL // CAT III 600V

Workshop Verification & Safety Checklist

WORKSHOP VERIFICATION PROTOCOLDrive Motor, Inverter & Tachometer SensorAir Conditioner / Heat Pump

2. Multimeter & Electrical Bench Tests (Ω)

MODE: OHMMETER (Ω)AUTO-RANGE

CALIBRATED METROLOGY RESISTANCE BENCH (CAT III)

Nominal Resistance (Ω)

3Ω–6Ω (BLDC phase U-V-W) / 60Ω–180Ω (Tacho coil) / 1.5Ω–3.5Ω (Universal stator)NOMINAL

0 Ω (SHORT)CALIBRATED BAND∞ OL (OPEN)

▲ NOMINAL OPERATING WINDOW

Target Component:3-Phase Motor Windings / Tacho Generator / Carbon Brushes

Test Pins & Connections

PROBE (+)

PROBE (-)

Across phase pins U-V, V-W, U-W on motor harness; across tacho pins

Tolerance & Diagnostic CriteriaBLDC phase winding values must be strictly balanced within ±0.3Ω. Hand rotation generates 1V–4V AC on tacho.

1. Pre-Intervention Electrical Safety Protocols

!High-Voltage Safety Protocol & DC Bus: Wait at least 5 minutes after power cutoff to allow inverter DC bus capacitors (380V DC) to bleed down.
!Verify 0V DC across inverter filter capacitors before unplugging motor harness connectors.
!Keep hands clear of drive belt and pulleys during any manual rotation tng.

3. Preliminary Mechanical & Visual Checks

Slip off drive belt and spin drum/motor shaft by hand to check for roaring or seized ball bearings.
For universal motors: verify carbon brushes have at least 10mm remaining length and smooth contact faces.
Inspect motor suspension rubber mounts and drive belt tension/groove profile.

Perform these diagnostic steps before triggering AI Deep Search or replacing boards.Certified Workshop Routine

Frequently Asked Questions: Airlux PU

FAQ TREE

What does error code PU mean on a Airlux appliance?

Airlux error code PU indicates: Capacitor charge malfunction.

What is the root cause of Airlux error code PU?

How do I fix or resolve Airlux error code PU?

To resolve error code PU: Check inverter board capacitor and charging circuit.

Is it safe to clear Airlux error code PU by resetting power?

How do I test electrical resistance for Airlux code PU using a multimeter?

What safety protocol must be followed before servicing Airlux code PU?

Community Verification

COMMUNITY

Did this solution resolve the issue?

Airlux PU

Symptom / Description

Root Cause

Repair Instructions

Field Actions

Workshop Verification & Safety Checklist

Frequently Asked Questions: Airlux PU

Community Verification

Related Airlux Air Conditioner / Heat Pump Error Codes

Airlux PU

Symptom / Description

Root Cause

Repair Instructions

Field Actions

Workshop Verification & Safety Checklist

Frequently Asked Questions: Airlux PU

Community Verification

Related Airlux Air Conditioner / Heat Pump Error Codes