OEM VERIFIED BENCH

OFFICIAL FAULT CODEi5B

Castor // OFFICIAL DIAGNOSTIC BENCH

Castor i5B

DishwasherDrive Motor, Inverter & Tachometer Sensor

Dishwasher

Other Brands Sharing Code i5B:ElectroluxI5B AEGI5B ZanussiI5B Arthur MartinI5B FaureI5B FrigidaireI5B KelvinatorI5B WestinghouseI5B ZoppasI5B

Symptom / Description

FAULT

Castor CDF Series / Lavastoviglie Silenziosa Dishwasher: Circulation pump inverter DC bus overvoltage alarm i5B; rectified bus voltage exceeds 430V DC.

TELEMETRY // LIVESIG: FAULT_DETECTED

Root Cause

ROOT CAUSE

On Castor (Castor CDF Series / Lavastoviglie Silenziosa Dishwasher) models: Mains electrical grid voltage surge, rapid deceleration of heavy wash arm water momentum, or defective DC bus capacitor bank.

CIRCUIT // SUBSYSTEMLOGIC: ROOT_ISOLATED

Repair Instructions

UNLOCKED

1Measure incoming AC line voltage (nominal 230V AC ± 10%). Disconnect power for 10 minutes to discharge capacitors, then retest. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

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 Castor 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 SensorDishwasher

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: Castor I5B

FAQ TREE

What does error code I5B mean on a Castor appliance?

Castor error code I5B indicates: Castor CDF Series / Lavastoviglie Silenziosa Dishwasher: Circulation pump inverter DC bus overvoltage alarm i5B; rectified bus voltage exceeds 430V DC..

What is the root cause of Castor error code I5B?

The primary root cause for Castor code I5B is: On Castor (Castor CDF Series / Lavastoviglie Silenziosa Dishwasher) models: Mains electrical grid voltage surge, rapid deceleration of heavy wash arm water momentum, or defective DC bus capacitor bank..

How do I fix or resolve Castor error code I5B?

To resolve error code I5B: Measure incoming AC line voltage (nominal 230V AC ± 10%). Disconnect power for 10 minutes to discharge capacitors, then retest. Hold Start and Reset keys for 5 seconds until the display clears the alarm code and restores standby status.

Is it safe to clear Castor error code I5B by resetting power?

Resetting power (unplugging for 5–10 minutes) clears temporary memory errors. However, if Castor code I5B persists, the physical component causing On Castor (Castor CDF Series / Lavastoviglie Silenziosa Dishwasher) models: Mains electrical grid voltage surge, rapid deceleration of heavy wash arm water momentum, or defective DC bus capacitor bank. must be inspected or replaced.

How do I test electrical resistance for Castor code I5B 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 Castor code I5B?

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.

Community Verification

COMMUNITY

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OEM VERIFIED BENCH

OFFICIAL FAULT CODEi5B

Castor // OFFICIAL DIAGNOSTIC BENCH

Castor i5B

DishwasherDrive Motor, Inverter & Tachometer Sensor

Dishwasher

Other Brands Sharing Code i5B:ElectroluxI5B AEGI5B ZanussiI5B Arthur MartinI5B FaureI5B FrigidaireI5B KelvinatorI5B WestinghouseI5B ZoppasI5B

Symptom / Description

FAULT

Castor CDF Series / Lavastoviglie Silenziosa Dishwasher: Circulation pump inverter DC bus overvoltage alarm i5B; rectified bus voltage exceeds 430V DC.

TELEMETRY // LIVESIG: FAULT_DETECTED

Root Cause

ROOT CAUSE

CIRCUIT // SUBSYSTEMLOGIC: ROOT_ISOLATED

Repair Instructions

UNLOCKED

AI WORKSHOP PROTOCOL ENGINE

Direct extraction from OEM factory manuals & wiring schematics

Field Actions

DISPATCH

Need Help? Call a Certified Technician Worldwide Castor 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 SensorDishwasher

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: Castor I5B

FAQ TREE

What does error code I5B mean on a Castor appliance?

Castor error code I5B indicates: Castor CDF Series / Lavastoviglie Silenziosa Dishwasher: Circulation pump inverter DC bus overvoltage alarm i5B; rectified bus voltage exceeds 430V DC..

What is the root cause of Castor error code I5B?

How do I fix or resolve Castor error code I5B?

Is it safe to clear Castor error code I5B by resetting power?

How do I test electrical resistance for Castor code I5B using a multimeter?

What safety protocol must be followed before servicing Castor code I5B?

Community Verification

COMMUNITY

Did this solution resolve the issue?

Castor i5B

Symptom / Description

Root Cause

Repair Instructions

Field Actions

Workshop Verification & Safety Checklist

Frequently Asked Questions: Castor I5B

Community Verification

Related Castor Dishwasher Error Codes

Castor i5B

Symptom / Description

Root Cause

Repair Instructions

Field Actions

Workshop Verification & Safety Checklist

Frequently Asked Questions: Castor I5B

Community Verification

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