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Melitta LOOK User Manual

Melitta LOOK
40 pages
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Service Manual
Type MVTU
Definite Time Delayed Relays

Table of Contents

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Melitta LOOK Specifications

General IconGeneral
TypeFilter Coffee Machine
Capacity10 cups
Keep Warm FunctionYes
ProgrammableNo
Coffee TypeGround coffee
Water Level IndicatorYes
Water TankRemovable
Water Tank Capacity1.25 L
Automatic Shut-OffYes

Summary

Handling of Electronic Equipment

Electrostatic Discharge (ESD) Precautions

Guidelines for preventing damage from static electricity when handling electronic modules.

Safety Section: Symbols and General Practices

Safe Installation and Servicing Practices

Emphasizes safety during equipment installation, commissioning, and servicing, including connections.

Safety Section: Operational and Component Precautions

Operating Conditions and Circuit Warnings

Covers operating conditions, warnings for CT circuits, resistors, batteries, and modules.

Relay Settings and Auxiliary Equipment

Voltage, Time, and Trip Indicator Settings

Describes how to configure voltage, time, and trip indication settings.

Commissioning Tests: Initial Checks

Inspection, Wiring, and Earthing

Verifying physical condition, wiring integrity, and proper earthing connections.

Test Block Connection and Insulation Testing

Procedures for connecting test blocks and performing insulation dielectric strength tests.

Commissioning Tests: Functional Testing

DC Supply and Test Block Setup

Checking DC auxiliary supply and preparing test blocks and VT circuits.

Commissioning Tests: Voltage Setting Verification

Measuring Pick-up and Drop-off Voltages

Detailed procedure for measuring voltage settings using test tables.

Commissioning Tests: Timer Setting Verification

Testing Time Delay Accuracy

Procedures for checking the accuracy of the relay's time delay settings.

Commissioning Tests: Final Checks

Verifying Settings, Indicators, and Contacts

Final checks on settings, trip indicators, and output contacts before service.

Problem Analysis: PCB Voltage and Current Tests

Voltage Supply Verification

Procedures for checking the presence and polarity of AC and DC voltage supplies to the module.

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