Multiquip DCA125USJ operation manual DCA-125USJ -TROUBLESHOOTING Generator

Page 49

DCA-125USJ —TROUBLESHOOTING (GENERATOR)

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, use Table 18 shown below for diagnosis of the Generator. If the problem cannot be remedied, consult our company's business office or service plant.

TABLE 18. GENERATOR TROUBLESHOOTING

SYMPTOM

POSSIBLE PROBLEM

SOLUTION

 

 

 

No Voltage Output

AC Voltmeter defective?

Check output voltage using a voltmeter.

 

 

 

 

Is wiring connection loose?

Check wiring and repair.

 

 

 

 

Is AVR defective?

Replace if necessary.

 

 

 

 

Defective Rotating Rectifier?

Check and replace.

 

 

 

 

Defective Exciter Field?

Check for 17.3 ohms across J & K on CN1

 

 

 

Low Voltage Output

Is engine speed correct?

Turn engine throttle lever to "High".

 

 

 

 

Is wiring connections loose?

Check wiring and repair.

 

 

 

 

Defective AVR?

Replace if necessary.

 

 

 

High Voltage Output

Is wiring connections loose?

Check wiring and repair.

 

 

 

 

Defective AVR?

Replace if necessary.

 

 

 

Circuit Breaker Tripped

Short Circuit in load?

Check load and repair.

 

 

 

 

Over current?

Confirm load requirements and reduce.

 

 

 

 

Defective circuit breaker?

Check and replace.

 

 

 

 

Over current Relay actuated?

Confirm load requirement and replace.

 

 

 

DCA-125USJ — OPERATION AND PARTS MANUAL — REV. #2 (01/27/11) — PAGE 49

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Contents Model DCA125USJ 2 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 Table of Contents Ordering parts has never been easier Parts Ordering ProceduresGenerator Specifications DCA-125USJ SpecificationsDimensions DCA-125USJ Dimensions TOP, Side and FrontSafety Messages DCA-125USJ Safety Information„ Always know the location of the nearest DCA-125USJ Safety Informationfire extinguisher first aid kitIf operating in speed ranges above the maximum allowable Before servicing equipment3ECURE Portable Power Cables in Cable Tray with TIE wraps „ Never use fuel as a cleaning agentFrom fuel vapors or if fuel is spilled on a hot engine „ Never use gas piping as an electrical ground Device. All installations should beDCA-125USJ Safety Information DCA-125USJ Generator Decals DCA-125USJ Generator Decals Typical Generator Grounding Application DCA-125USJ InstallationOutdoor Installation DCA-125USJ InstallationIndoor Installation MountingEngine Operating Panel DCA-125USJ Series Familiarization GeneratorGenerator Control Panel Control BoxGenerator Major Components DCA-125USJ Major Components20 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 DCA-125USJ Generator Control Panel DCA-125USJ Engine Operating Panel DCA-125USJ Engine Operating Panel Output Terminal Familiarization DCA-125USJ Output Terminal Panel FamiliarizationTwist Lock Dual Voltage 120/240 VAC Receptacles 120VAC Gfci ReceptaclesBlower Fan Connecting LoadsThree Phase Load Single Phase LoadDCA-125USJ Load Application Motors and motor-drivenGenerator OutputVoltages Voltage Selector SwitchGenerator Amperage Gfci Receptacle Load CapabilityDCA-125USJ Gauge Reading How to Read the OutputTerminal GaugesReading Amperage Uvwo Terminal Output Voltages DCA-125USJ Output Terminal Panel Connections3Ø 240/139 Output Terminal Lug Voltages 3Ø 208V/1Ø120V Output Terminal Lug Voltages1Ø 240V/120V Output Terminal Lug Voltages 3Ø 480/277 Output Terminal Lug VoltagesCircuit Breakers DCA-125USJ PRE-SETUPLubrication Oil Fuel CheckRefueling Refueling ProcedureAir Cleaner Fan Belt Tension Cleaning the RadiatorOperation FreezingWeather Must be less than 50%Battery Cable Installation BatteryWiring AlternatorEngines exhaust contains harmful emissions Before StartingDirect exhaust away from nearby personnel Starting ManualFrequency Meter Hz Place the Mpec Control Switch in the Auto position Starting Auto ModeIs placed in the Auto position Emergency Shutdown Procedure Normal Shutdown ProcedureDCA-125USJ Maintenance Check Oil Level Air RemovalReplacing Oil Filter Replacing Fuel FilterTo ensure adequate starting Battery chargerBrake Adjustment DCA-125USJ -TRAILER Brakes MaintenanceBrakes Hydraulic Surge BrakesSuspension Tires/Wheels/Lug NutsTire Wear/Inflation Lug Nut Torque Requirements DCA-125USJ -TRAILER MaintenanceStart all wheel lug nuts by hand DCA-125USJ -TRAILERWIRING Diagram Generator Wiring Diagram DCA-125USJ Generatorwiring DiagramDCA-125USJ Enginewiring Diagram DCA-125USJ -TROUBLESHOOTING Generator Engine Controller Troubleshooting Mpec DCA-125USJ -TROUBLESHOOTING Engine ControllerDCA-125USJ Operation and Parts Manual REV. #2 01/27/11 QTY. Column DCA-125USJ Explanation of Code in Remarks ColumnQty Description DCA-125USJ Suggested Spare PartsDCA-125USJ Generator Assy DCA-125USJ Generator Assy DCA-125USJ Control BOX Assy 0330000180 M32130007020601808823 LAF3630010393P58 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 DCA-125USJ Control BOX Assy DCA-125USJ Engine and Radiator Assy 0602041292 M3923200054RE504836 0602042594Engine & Radiator Assy 0602022563 06055151970602022561 0603306590DCA-125USJ Outputterminal Assy DCA-125USJ Outputterminal Assy DCA-125USJ Battery Assy 4D-2 0602220196M9310500404 M9103000504DCA-125USJ Muffler Assy 0017112030 M3330100402M3333000903 M3333200304DCA-125USJ Fueltank Assy 0605505070 M33630014020605501074 0605516090Enclosure #1 Assy DCA-125USJ Enclosure #1 AssyM3363300303 M34130018120016910030 060330679774 DCA-125USJ Operation and Parts Manual REV. #2 01/27/11 24A M3493201204 24A M34932006140010114040 25A 0030014000Enclosure #2 Assy DCA-125USJ Enclosure #2 AssyM3443000812 M3443000802M3493303203 M3443000904DCA-125USJ Rubber Seals Assy 0229201130 02292008700229201240 0228900660DCA-125USJ Nameplate and Decals Assy M15000020 M1550000204M1550000703 M15000070Freight Policy Terms and Conditions of Sale PartsDCA-125USJ Operation and Parts Manual REV. #2 01/27/11 HERE’S HOW to GET Help

DCA125USJ specifications

The Multiquip DCA125USJ is a robust, high-performance generator designed to meet the diverse needs of various industries, including construction, events, and emergency backup. This generator boasts a compact size and impressive output, making it a reliable choice for both temporary and permanent power solutions.

At the heart of the DCA125USJ is a powerful diesel engine, providing an impressive 125 kVA output. This engine is engineered for efficiency, ensuring that the generator can continuously deliver reliable power while maintaining low operational costs. The generator operates at low RPM, which not only extends the engine's lifespan but also reduces noise levels, making it ideal for urban environments and sensitive locations.

One of the standout features of the DCA125USJ is its advanced electronic control system. This technology allows for seamless monitoring and management of the generator's performance, ensuring optimal operation. The control panel is user-friendly, offering real-time data on voltage, frequency, and operating hours, which simplifies maintenance and troubleshooting.

The DCA125USJ is equipped with a sturdy, weather-resistant enclosure that protects it from the elements, making it suitable for outdoor applications. This enclosure also contributes to noise reduction, ensuring quieter operation compared to traditional generators. Additionally, its compact design allows for easy transport and installation, making it a versatile option for various job sites.

Safety is a top priority in the design of the DCA125USJ. It features multiple safety mechanisms, such as an automatic shut-off system that activates in the event of low oil pressure or overheating, protecting the generator and prolonging its operational life.

Moreover, the DCA125USJ is compliant with rigorous emissions standards, making it an environmentally responsible choice. It offers options for multiple voltage outputs, which adds to its adaptability for different applications, from powering heavy machinery to providing electricity for small tools.

In summary, the Multiquip DCA125USJ stands out for its powerful diesel engine, state-of-the-art electronic controls, robust construction, and focus on safety and efficiency. Whether used in construction, outdoor events, or as a backup power source, the DCA125USJ is engineered to deliver reliable performance in a user-friendly package. This makes it a top contender for anyone needing dependable generator capabilities.
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