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MQ Power WHISPERWATT DCA400SSI4F3PD Instruction Manual

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OPERATION MANUAL
WHISPERWATT™ SERIES
MODEL
DCA400SSI4F3PD
60 Hz GENERATOR
(ISUZU BQ-6WG1X DIESEL ENGINE)
INSTRUCTION MANUAL NO. C3844304014
Revision #4 (05/20/25)
To find the latest revision of this publication or
associated parts manual, visit our website at:
www.mqpower.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.

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  • Page 1 OPERATION MANUAL WHISPERWATT™ SERIES MODEL DCA400SSI4F3PD 60 Hz GENERATOR (ISUZU BQ-6WG1X DIESEL ENGINE) INSTRUCTION MANUAL NO. C3844304014 Revision #4 (05/20/25) To find the latest revision of this publication or associated parts manual, visit our website at: www.mqpower.com THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.

  • Page 2: Proposition 65 Warning

    PROPOSITION 65 WARNING PAGE 2 — DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25)

  • Page 3: Table Of Contents

    TABLE OF CONTENTS DCA400SSI4F3PD NOTICE 60 Hz Generator Specifications are subject to change without notice. Proposition 65 Warning ........... 2 Table of Contents ............. 3 Safety Decals ............4 Safety Information ..........5–10 Specifications ............11 Dimensions ............12 Installation ............13–14 General Information ..........

  • Page 4: Safety Decals

    SAFETY DECALS SAFETY DECALS NOTICE Safety decals are attached to the generator as shown in For safety decal part numbers, refer to the associated Figure 1. Keep these safety decals clean at all times. When parts manual. the safety decals become worn or damaged, contact your nearest dealer or the Multiquip Parts Department.

  • Page 5: Safety Messages

    SAFETY INFORMATION Do not operate or service the generator before reading the Potential hazards associated with the operation of this entire manual. Safety precautions should be followed at all generator will be referenced with hazard symbols which times when operating this generator. Failure to read and may appear throughout this manual in conjunction with understand the safety messages and operating instructions safety messages.

  • Page 6: General Safety

    „ NEVER use accessories or attachments that are not being used. The generator should be stored in a clean, recommended by MQ Power for this generator. Damage dry location out of the reach of children and unauthorized to the generator and/or injury to the user may result.

  • Page 7: Engine Safety

    SAFETY INFORMATION ENGINE SAFETY „ Operation of the generator may create sparks that can start fi res around dry vegetation. A spark arrestor DANGER may be required. The operator should contact local fi re agencies for laws or regulations relating to fi re prevention „...

  • Page 8: Fuel Safety

    „ The trailer should be adjusted to a level position at all times when towing. „ Refer to the MQ Power trailer manual for additional safety information. „ Raise and lock the trailer wheel stand in the upright position when towing.

  • Page 9: Electrical Safety

    SAFETY INFORMATION ELECTRICAL SAFETY „ Make sure power cables are securely connected to the generator’s output receptacles. Incorrect connections DANGER may cause electrical shock and damage to the generator. „ NEVER touch the output terminals NOTICE during operation. Contact with the „...

  • Page 10: Emissions Information

    SAFETY INFORMATION EMISSIONS INFORMATION „ If the battery liquid (dilute sulfuric acid) comes into contact with eyes, rinse eyes immediately with plenty NOTICE of water and contact the nearest doctor or hospital to seek medical attention. The diesel engine used in this equipment has been designed to reduce harmful levels of carbon monoxide CAUTION (CO), hydrocarbons (HC), and nitrogen oxides (NOx)

  • Page 11: Specifications

    SPECIFICATIONS Table 1. Generator Specifications Model DCA400SSI4F3PD Type Revolving field, self-ventilated, open protected type synchronous generator Armature Connection Star with Neutral Phase 3Ø Standby Output 336 kW (420 kVA) Prime Output 320 kW (400 kVA) 3Ø Voltage (L–L/L–N) 208Y/120, 220Y/127, 240Y/139 Voltage Change-Over Bd.

  • Page 12: Dimensions

    DIMENSIONS TOP VIEW SIDE VIEW Figure 2. Dimensions FRONT VIEW Table 3. Dimensions Reference Dimension Reference Dimension Letter in. (mm) Letter in. (mm) 31.89 (810) 22.83 (580) 22.83 (580) 31.89 (810) 26.00 (660) 21.46 (545) TIER 4F 27.16 (690) 30.71 (780) 25.59 (650) 107.87 (2,740) 27.16 (690)

  • Page 13: Generator Grounding

    GENERATOR GROUND LUG GROUND ROD GROUND CABLE REFERENCE NEC 250 Figure 3. Typical Generator Grounding Application NOTICE Trailer-mounted generators are the sole responsibility of MQ Power. DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25) — PAGE 13...

  • Page 14: Outdoor Installation

    INSTALLATION OUTDOOR INSTALLATION MOUNTING Install the generator in an area that is free of debris, The generator must be mounted on a solid foundation bystanders, and overhead obstructions. Make sure the (such as concrete) and set firmly on the foundation to generator is on secure, level ground so that it cannot slide isolate vibration of the generator when it is running.

  • Page 15: General Information

    • Voltage Change-Over Board generator. Refer to Table 2 for engine specifications. In keeping with MQ Power’s policy of constantly improving OUTPUT TERMINAL PANEL its products, the specifications quoted herein are subject The output terminal panel is provided with the following: to change without prior notice.

  • Page 16: Load Sharing

    GENERAL PARALLELING INFORMATION PARALLELING REACTIVE POWER (KVAR) LOAD SHARING Paralleling is the sharing of a load between two or more When generator sets operate in parallel, the alternator generator sets. field excitation system of each generator set controls the proportional sharing of the total reactive power LOAD SHARING requirements (kVAR) of the system.

  • Page 17: Major Components

    MAJOR COMPONENTS Table 4. Major Components ITEM NO. DESCRIPTION Muffler Assembly Battery Switch (S/N 3979256 and Above) Battery Switch (S/N 3979255 and Below) Generator Assembly Battery Assembly Engine Assembly DEF Supply Module Assembly Fuel Tank Assembly WHISPERWATT 400 kVA AC GENERATOR Emergency Stop Switch (S/N 3960359 and Above) Emergency Stop Switch (S/N 3960358 and Below) TIER 4F...

  • Page 18: Control And Operation Panel

    CONTROL AND OPERATION PANEL 9 10 Figure 5. Control And Operation Panel 8. Ethernet Port — An ethernet cable can be plugged The definitions below describe the controls and functions of the control and operation panel (Figure 5). into this port for testing/configuration of the AGC-4 controller via a remote computer.

  • Page 19: Output Terminal Panel Familiarization

    OUTPUT TERMINAL PANEL FAMILIARIZATION OUTPUT TERMINAL PANEL OUTPUT TERMINAL FAMILIARIZATION The output terminal panel (Figure 6) shown below is The output terminal panel is provided with the following: provided for the connection of electrical loads. Lift up on „ Three (3) 240/139-volt output receptacles @ 50 amps the cover to gain access to receptacles and terminal lugs.

  • Page 20: Reset Button

    OUTPUT TERMINAL PANEL FAMILIARIZATION 120-Volt AC GFCI Receptacles NOTICE It is recommended that the GFCI receptacles be tested when the generator is initially uncrated. The receptacles should then be tested daily at startup. SINGLE-PHASE CS-6369 240/139 VAC TWIST-LOCK 50-AMP OUTPUT RECEPTACLES There are two 120-volt, 20-amp GFCI (duplex NEMA 5-20R) receptacles provided on the output terminal panel.
  • Page 21 OUTPUT TERMINAL PANEL FAMILIARIZATION Connecting Loads OVERCURRENT RELAY An overcurrent relay (Figure 11) is connected to the Loads can be connected to the generator via the output terminal panel, convenience receptacles, or cam-loks main circuit breaker. In the event of an overload, both the (Figure 10).

  • Page 22: Load Application

    LOAD APPLICATION SINGLE-PHASE LOAD THREE-PHASE LOAD Always be sure to check the nameplate on the generator When calculating the power requirements for 3-phase and equipment to ensure the wattage, amperage, power, use the following equation: frequency, and voltage requirements are satisfactorily VOLTAGE ×...

  • Page 23: Powerbalance

    POWERBALANCE ® PowerBalance (Figure 12) is an optional load management ® solution that helps protect the engine generator from problems resulting from sustained low-load operations (defined as less than 30% of the generator full-load rating). POWERBALANCE ® ASSEMBLY Figure 12. PowerBalance ®...

  • Page 24: Generator Outputs

    GENERATOR OUTPUTS GENERATOR OUTPUT VOLTAGES Maximum Amps Table 8 shows the maximum amps the generator can A wide range of voltages (Table 7) is available for many different applications. provide. DO NOT exceed the maximum amps as listed. Table 7. Available Voltages Table 8.

  • Page 25: Output Terminal Panel Connections

    OUTPUT TERMINAL PANEL CONNECTIONS UVWO TERMINAL OUTPUT VOLTAGES 2. Connect the load wires to the UVWO terminals as shown in Figure 15. Various output voltages can be obtained using the UVWO output terminal lugs. The voltages at the terminals are BLUE WHITE GREEN...
  • Page 26 OUTPUT TERMINAL PANEL CONNECTIONS Single-Phase 120-Volt 3-Phase 480-Volt UVWO Terminal Output Voltages UVWO Terminal Output Voltages 1. Jumper the voltage change-over board for 480-volt operation as shown in Figure 18. This configuration 1. Make sure the voltage change-over board is jumpered uses 6 jumper plates in 3 different positions.
  • Page 27 OUTPUT TERMINAL PANEL CONNECTIONS Single-Phase 480-Volt Single-Phase 277-Volt UVWO Terminal Output Voltages UVWO Terminal Output Voltages 1. Make sure the voltage change-over board is jumpered 1. Make sure the voltage change-over board is jumpered for 480-volt operation as shown in Figure 18. for 480-volt operation as shown in Figure 18.

  • Page 28: Engine Oil Check

    INSPECTION/SETUP ENGINE OIL CHECK NOTICE 1. To check the engine oil level, place the generator on When adding engine oil, DO NOT overfill (Figure 23B). secure, level ground with the engine stopped. 2. Remove the dipstick from its holder (Figure 22) and wipe it clean.

  • Page 29: Fuel Check

    INSPECTION/SETUP FUEL CHECK Refueling Procedure DANGER WARNING Fuel spillage on a hot engine can cause a Diesel fuel and its vapors are dangerous fire or explosion. If fuel spillage occurs, to your health and the surrounding wipe up the spilled fuel completely to prevent environment.

  • Page 30: Diesel Exhaust Fluid

    INSPECTION/SETUP DEF Refilling 3. NEVER overfill the fuel tank. When refueling, DO NOT wait for fuel to rise inside the filler neck NOTICE (Figure 28). Leave room for fuel expansion. Fuel expands when heated (Figure 29). ONLY fill the DEF tank with diesel exhaust fluid. Any other type of fluid may cause severe engine damage.
  • Page 31 INSPECTION/SETUP COOLANT Operation In Freezing Weather (ANTIFREEZE/SUMMER COOLANT/WATER) When operating in freezing weather, be certain the proper amount of antifreeze (Table 11) has been added. Isuzu recommends antifreeze/summer coolant for use in their engines, which can be purchased in concentrate (and mixed Table 11.

  • Page 32: Fan Belt Tension

    INSPECTION/SETUP FAN BELT TENSION Before charging the battery with an external electrical source, be sure to disconnect the battery cables. A slack fan belt may contribute to overheating, or to Battery Cable Installation insufficient charging of the battery. Inspect the fan belt for damage and wear and adjust it in accordance with the Connect the two 12-volt batteries in series (24-volt system) Isuzu engine owner’s manual.
  • Page 33 INSPECTION/SETUP WIRING NOTICE Inspect the entire generator for bad or worn electrical wiring If the battery cables are connected incorrectly, electrical or connections. If any wiring or connections are exposed damage to the generator will occur. Pay close attention (insulation missing) replace wiring immediately. to the polarity of the battery when connecting the battery.

  • Page 34: Generator Start-Up Procedure (Single Unit)

    GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) BEFORE STARTING 3. Make sure the GFCI and auxiliary circuit breakers are placed in the OFF position (Figure 38). CAUTION The engine’s exhaust contains harmful emissions. ALWAYS have adequate ventilation when operating. Direct exhaust away from nearby personnel.
  • Page 35 GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) 6. Verify that the Main Circuit Breaker OFF lamp 9. On the touch display, press the Page Down button (Figure 41) is illuminated (RED). This indicates that (Figure 44) to scroll back to the Home screen (1 of 7). the circuit breaker contacts are open.

  • Page 36: Application Selection

    GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) APPLICATION SELECTION 5. Verify that the A1 - Single DG/Analog LS status indicator is ON (GREEN). See Figure 50. 1. On the touch display, press the AOP button (Figure 46). Figure 46. AOP Button 2.
  • Page 37 GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) STARTING (SEMI-AUTO MODE) NOTICE 1. On the touch display, press the Mode Change The Mode Change button will display one of the four button (Figure 53). Operational Mode icons, depending on which mode is selected.
  • Page 38 GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) 10. Place the GFCI and auxiliary circuit breakers NOTICE (Figure 61) in the ON position to send power to the GFCI (120V) and auxiliary (dual-voltage) receptacles. When the Idle Speed Inhibit button (located on the AOP1 screen) has been pressed and the Low Idle Speed Inhibited status indicator is ON (GREEN), the engine will not undergo the standard idling warmup...
  • Page 39 GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) 13. Press the Page Up button (Figure 64) to scroll to 9/30/2020 - 5:45:32 PM screen 5 of 7. Active Power (P) GEN ISLAND SEMI 2500 2000 Apparent Power (S) GEN 1500 6 / 7 1000...

  • Page 40: Auto Mode

    GENERATOR START - UP PROCEDURE ( SINGLE UNIT ) STARTING (AUTO MODE) STARTING (MANUAL MODE) Manual mode enables the use of the Voltage Up/Down WARNING buttons (Figure 71) on the AOP1 screen for manual voltage When running the generator in Auto mode, remember adjustment.

  • Page 41: Generator Shutdown Procedure (Single Unit)

    GENERATOR SHUTDOWN PROCEDURE ( SINGLE UNIT ) NORMAL SHUTDOWN PROCEDURE 5. Press the STOP button (Figure 77) on the touch display. The engine will stop after a 30-second WARNING cool-down period. NEVER stop the engine suddenly except in an emergency. 1.

  • Page 42: Emergency Shutdown Procedure

    NEVER be used for routine stopping of protection devices and fault codes. If necessary, contact the engine. MQ Power for additional technical support. To stop the engine in the event of an emergency: NOTICE 1. Press the Emergency Stop switch (Figure 80).
  • Page 43 NOTES DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25) — PAGE 43...

  • Page 44: Generator Start-Up Procedure (Parallel Operation)

    GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) PARALLEL SIGNAL SWITCH GENERATOR #1 OUTPUT TERMINAL PANEL GENERATOR #2 Figure 81. Communication Cable Connections (Two Generators) PARALLEL SIGNAL SWITCH GENERATOR #1 GENERATOR #2 OUTPUT TERMINAL PANEL GENERATOR #3 Figure 82. Communication Cable Connections (Three Or More Generators) PAGE 44 —...
  • Page 45 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) COMMUNICATION AND POWER CONNECTIONS NOTICE (THREE OR MORE GENERATORS) To ensure stable operation of multiple generator units NOTICE connected in parallel and working as one unit, it is necessary to maintain equal voltage, frequency, and A maximum of 32 generators can be operated in engine governor characteristics between them.
  • Page 46 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) PARALLEL OPERATION Application Selection (50/50 Loadshare) (TWO OR MORE GENERATORS) Perform the following procedure on each generator: There are two available applications for parallel operation of 1. On the touch display, press the AOP button (Figure 83). multiple generators —...
  • Page 47 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 5. Verify that the A2 - 50/50 Loadshare CAN status 8. Verify that the Home screen (1 of 7) is displayed. See indicator is ON (GREEN). See Figure 87. Figure 90. 9/30/2020 - 5:45:07 PM Active Power (P)GEN DG BLOCKED FOR START...
  • Page 48 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 12. Verify that the Main AOP screen (Figure 94) is 4. Press the Controller Settings Shortcut button displayed. If the Main AOP screen is not displayed, (Figure 96) on the touch display. press the Main AOP button (Figure 85).
  • Page 49 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 7. Verify that the Text Keyboard screen (Figure 99) is displayed. 7531 Figure 101. Password Required Screen 12. Verify that the Passcode Keypad screen (Figure 102) Figure 99. Text Keyboard Screen is displayed.
  • Page 50 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 17. Press the Save button (Figure 105). The touch display NOTICE will return to the Search Results screen (Figure 106). The Internal Communication ID value is unique for each generator (Figure 103). A different numerical value must be entered for each generator.
  • Page 51 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) Starting (50/50 Loadshare) 3. Press the Semi Mode button (Figure 110). SEMI MODE NOTICE When multiple generators are connected in parallel to act as a single unit, it is important that the voltage and phasing of each generator be synchronized.
  • Page 52 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 9. Verify that the Main Circuit Breaker ON lamp NOTICE (Figure 115) is illuminated (GREEN). This indicates If the engine fails to start on the first crank attempt, that the circuit breaker contacts are closed and two additional crank cycles will occur automatically.
  • Page 53 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) EZ CONNECT APPLICATION 2. Verify that the Main AOP screen (Figure 118) is displayed. Perform the following procedures to operate two or more units in parallel using the EZ Connect application. Before Starting WARNING ALWAYS connect the output terminals to...
  • Page 54 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 6. Press the EZ Connect Setup ON/OFF button 9. Next, the Receiving Application screen will be (Figure 122). displayed (Figure 125). 9/30/2020 - 5:45:45 PM EZ Connect Setup ON/OFF Receiving Application A1 - Single DG/ 480V-3PH-60Hz Auto Mode...
  • Page 55 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 13. Press the Main Menu button (Figure 128). 17. Verify that screen 2 of 7 is displayed (Figure 132), then press the Power Management button. 9/30/2020 - 5:45:16 PM EIC Engine Speed (SPN) ISLAND SEMI Auto.
  • Page 56 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 21. Verify that the Main AOP screen (Figure 135) is 28. Verify that the Main Menu screen is displayed displayed. If the Main AOP screen is not displayed, (Figure 138), then press the Supervision button. press the Main AOP button (Figure 119).
  • Page 57 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) Starting (EZ Connect, Semi-Auto Mode) 3. Press the Semi Mode button (Figure 142). SEMI MODE NOTICE DO NOT try to run parallel units in Manual mode. 1. On generator #1, press the Mode Change button (Figure 140) on the touch display.
  • Page 58 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 6. Listen for any abnormal noises. If any abnormalities 9/30/2020 - 5:46:31 PM exist, shut down the engine and correct the problem. 7. On the touch display (Figure 144), verify that the Easy connect appl.
  • Page 59 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 19. Before proceeding, confirm that there are no active 3. The paralleled system will now start up or shut down alarms on any of the generators in the layout. The connected generators as needed, utilizing a 90/30 presence of the Alarm icon (Figure 149) on the status threshold scheme: Once the load has reached 90% of bar indicates that there are active alarms.
  • Page 60 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 3. Verify that the EZ Connect Setup Enabled status WARNING indicator (Figure 152) is OFF. Incorrect electrical connections could cause severe EZ Connect Setup damage to equipment and serious injury or death to personnel.

  • Page 61: Select Application

    GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 4. Press the Select Application 4 button (Figure 156). 9/30/2020 - 5:45:07 PM SELECT Active Power (P)GEN DG BLOCKED FOR START APPLICATION 4 Apparent Power (S)GEN 1 / 7 GEN Voltage L3-L1 Figure 156.
  • Page 62 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 11. Repeat steps 1–3 to return to the Main AOP screen NOTICE (Figure 163). Verify that the Fixed Power status While operating in Auto mode, should a power outage indicator is ON (GREEN). occur while connected to an automatic transfer switch (ATS), the ATS will start the generator automatically via the generator’s auto-start contacts connected to...
  • Page 63 GENERATOR START - UP PROCEDURE ( PARALLEL OPERATION ) 2. Verify that the four Operational Mode buttons 5. When the generator is connected to a building’s AC (Figure 165) are displayed just above the Mode power source via an automatic transfer switch (ATS), Change button.

  • Page 64: Generator Shutdown Procedure (Parallel Operation)

    GENERATOR SHUTDOWN PROCEDURE ( PARALLEL OPERATION ) SHUTDOWN PROCEDURE 6. On generator #1, press the STOP button (Figure 171) on the touch display. The engine will shut down after (PARALLEL OPERATION) a 30-second cool-down period. WARNING NEVER stop the engine suddenly except in an emergency.
  • Page 65 GENERATOR SHUTDOWN PROCEDURE ( PARALLEL OPERATION ) 10. The Receiving Application screen will be displayed next (Figure 174). After this message has cleared, repeat steps 8–10 on the remaining units. 9/30/2020 - 5:45:45 PM Receiving Application A1 - Single DG/ 480V-3PH-60Hz Auto Mode Island...

  • Page 66: Maintenance

    MAINTENANCE Every Every 500 Every 1,000 Table 12. Inspection/Maintenance Daily Other Hours Hours Hours Check Engine Oil and Coolant Levels Check Fuel Filter/Water Separator Bowl Check Battery Fluid Level Check Air Cleaner Check for Leaks Visual Walk Around Inspection Clean Air Cleaner Element Drain Bottom of Fuel Tank Replace Engine Oil and Oil Filter* Replace Fuel Filter Elements...

  • Page 67: General Inspection

    MAINTENANCE GENERAL INSPECTION Primary And Secondary Air Cleaner Elements Every 250 hours: Remove the air cleaner elements and Prior to each use, the generator should be cleaned and inspected for deficiencies. Check for loose, missing, or clean them with a light spray of compressed air. damaged nuts, bolts, or other fasteners.
  • Page 68 MAINTENANCE Air Cleaner Restriction Indicator Draining The Fuel Filter The air cleaner is equipped with a restriction indicator 1. Loosen the air bleeder plug (Figure 178) on the fuel (Figure 177). As the air cleaner element becomes clogged, filter body. air intake restriction increases and the indicator signal shows RED, indicating that the element needs to be replaced.
  • Page 69 MAINTENANCE Fuel Filter Element Replacement REMOVING WATER FROM THE FUEL TANK 1. Using a filter wrench, remove the element case from After prolonged use, water and other impurities accumulate the fuel filter body (Figure 179). in the bottom of the fuel tank. Occasionally inspect the fuel tank for water contamination and drain the contents if required.

  • Page 70: Draining The Engine Oil

    MAINTENANCE DRAINING THE ENGINE OIL ENGINE OIL FILTER REPLACEMENT 1. Run the engine until the engine coolant reaches a NOTICE temperature of 140°F (60°C). Filter head appearance may vary. 2. Turn the engine OFF. 3. Remove the oil dipstick from its holder. 1.

  • Page 71: Cleaning The Radiator

    MAINTENANCE 6. Run the engine for several minutes. Watch for oil 3. After the coolant has completely drained, place the leakage. Shut the engine down and allow it to sit for coolant drain valve in the CLOSED position. several minutes. Top off the oil to the upper limit on 4.

  • Page 72: Drive Belt

    MAINTENANCE DRIVE BELT TESTING THE GFCI RECEPTACLE Drive Belt Tension NOTICE The GFCI receptacle is designed to interrupt power A slack drive belt may contribute to overheating or when a ground fault exists to prevent injuries and shock insufficient charging of the battery. Adjust the drive belt in hazards.

  • Page 73: Generator Storage

    MAINTENANCE GENERATOR STORAGE 5. Press the RESET button (Figure 190) to restore power to the GFCI receptacle and verify that the status LED For long-term storage of the generator the following is is ON (GREEN). recommended: „ Drain the fuel tank completely. Treat with a fuel stabilizer if necessary.
  • Page 74 MAINTENANCE ENGINE BLOCK HEATER AND When using the generator in hot climates there is no reason to apply power to the engine block heater. However, if the INTERNAL BATTERY CHARGER generator will be used in cold climates it is always a good 120 VAC INPUT RECEPTACLES idea to apply power to the heater at all times.

  • Page 75: Emission Control

    MAINTENANCE EMISSION CONTROL PREVENTIVE MAINTENANCE PROGRAMS The emission control system employed with this diesel Most challenging to a rental organization is the fact that a engine consists of a diesel oxidation catalyst (DOC) customer’s power assumptions may not meet the minimum and a selective catalytic reduction (SCR) catalyst load requirements of the power equipment selected.
  • Page 76 MAINTENANCE SELECTIVE CATALYTIC REDUCTION (SCR) 1. Check Engine Indicator (Yellow) — This symbol is displayed when an engine fault occurs. Check active Diesel engines can be run with a lean burn air-to-fuel diagnostic trouble codes (DTC). ratio, to ensure the full combustion of soot and to prevent 2.
  • Page 77 MAINTENANCE SCR Purge Operation Guidelines Automatic Purge Operation The Automatic Purge operation is performed automatically For the safe operation of equipment, protection of the surrounding area, and prevention of bodily harm, use the every 30 hours. No operator action is required for this guidelines below when a purge operation is required: process.
  • Page 78 Figure 199. Exhaust After-Treatment Dashboard approximately another two hours, manual purging will (Check DEF Indicator) become impossible. If this occurs, contact your nearest Table 13. DEF Level System Action MQ Power or Sunbelt dealer. DEF Level Below 15% Below 10% Below 5%...
  • Page 79 MAINTENANCE INDUCEMENT NOTICE When the system senses improper usage such as no Replace the DEF filter (located in the urea SCR system supply of DEF, use of poor quality DEF, problems with supply module) every 1,000 hours of operation. Refer DEF dosing, or disconnection of sensors, a warning will be to the Replacement of DEF Filter section in the Isuzu issued before the situation becomes critical.

  • Page 80: Escape Mode

    MAINTENANCE Table 15. DEF Inducement (Poor Quality, Tampering, and Repeat Offense) Check Engine Check Engine Engine Emission Stage DEF Indicator Indicator (Yellow) Indicator (Red) Indicator Stage 1 — Warning Level 1 Stage 2 — Warning Level 2 Slow Flashing Stage 3 Shutdown Fast Flashing Escape Mode...
  • Page 81 MAINTENANCE Escape Mode Activation 5. To deactivate Escape mode, press the STOP button (Figure 203) on the touch display to stop the engine, 1. Navigate to the AOP1 screen (Figure 200) and press then place the Control Power switch (Figure 204) in the Enter Diagnostic Mode button.

  • Page 82: Troubleshooting (Faults)

    TROUBLESHOOTING ( FAULTS ) FAULTS/ALARMS 4. To reset an alarm, stop operation and shut down the engine. Allow a sufficient cooling period, then inspect This unit is equipped with engine protection devices that the unit and repair the problem before restarting automatically shut down the engine when a fault occurs.

  • Page 83: Diagnostic Mode

    TROUBLESHOOTING ( FAULTS ) DIAGNOSTIC MODE Diagnostic mode allows the digital controller to communicate with the engine control module (ECM) to view active fault messages and codes as well as previous fault occurrences which have been recorded in the ECM. Whenever the generator cannot be started due to a fault, place the generator in Diagnostic mode to identify the problem.
  • Page 84 TROUBLESHOOTING ( FAULTS ) Table 16. Automatic Engine Shutdown System Fault Code Condition Display Message Setpoint Timer Fail Class 1000 Reverse Power Reverse Power 1 –10% 30 s Warning 1010 Reverse Power Reverse Power 2 –15% 10 s Trip + Stop 1030 Over Current Over Current 1...
  • Page 85 TROUBLESHOOTING ( FAULTS ) Table 16. Automatic Engine Shutdown System Fault Code Condition Display Message Setpoint Timer Fail Class 3460 Crank Case SW Clogged Crank Case Pres Shutdown 3490 Emergency Stop Emergency STOP Shutdown 3570 Force Regeneration Request Error Force purge ERR Controlled Stop 4120 Low Fuel...
  • Page 86 TROUBLESHOOTING ( FAULTS ) Table 17. Fail Class Actions (Engine Running) Alarm Cool Down Fail Class Alarm Horn De-Load Trip of GB Trip of MB Stop Genset Display Generator Block – – – – –   Warning   –...

  • Page 87: Troubleshooting (Generator)

    TROUBLESHOOTING ( GENERATOR ) Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, use Table 19 below for diagnosis of the generator. If the problem cannot be remedied, consult our company’s business office or service plant.

  • Page 88: Troubleshooting (Engine)

    TROUBLESHOOTING ( ENGINE ) Troubleshooting (Engine) Symptom Possible Problem Solution No fuel reaching injection pump? Add fuel. Check entire fuel system. Defective fuel pump? Replace fuel pump. Fuel fi lter clogged? Replace fuel fi lter and clean tank. Faulty fuel supply line? Replace or repair fuel line.
  • Page 89 TROUBLESHOOTING ( ENGINE ) Troubleshooting (Engine) - continued Symptom Possible Problem Solution Air fi lter blocked? Clean or replace air fi lter. Low engine power output and low speed, Incorrect valve clearances? Adjust valves per engine specifi cation. black exhaust smoke. Malfunction at injector? See engine manual.

  • Page 90: Generator Wiring Diagram (C3814005913)

    GENERATOR WIRING DIAGRAM ( C3814005913 ) PAGE 90 — DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25)

  • Page 91: Engine Wiring Diagram (C3814106213)

    ENGINE WIRING DIAGRAM ( C3814106213 ) DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25) — PAGE 91...

  • Page 92: Parallel Circuit Diagram (C3814300913)

    PARALLEL CIRCUIT DIAGRAM ( C3814300913 ) PAGE 92 — DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25)

  • Page 93: Controller Wiring Diagram (A) (C3844304004)

    CONTROLLER WIRING DIAGRAM ( A ) ( C3844304004 ) DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25) — PAGE 93...

  • Page 94: Controller Wiring Diagram (B) (C3844304004)

    CONTROLLER WIRING DIAGRAM ( B ) ( C3844304004 ) PAGE 94 — DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25)

  • Page 95: Mcb Sequence Diagram (C3814206413)

    MCB SEQUENCE DIAGRAM ( C3814206413 ) DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25) — PAGE 95...

  • Page 96: Battery Charger Wiring Diagram

    BATTERY CHARGER WIRING DIAGRAM BLACK 14 AWG. LINE (L)120VAC INPUT WHITE 14 AWG. NEUTRAL (N) GREEN 14 AWG. GROUND (G) TO CHASSIS GROUND GREEN 16 AWG. TO STARTER “B” TERMINAL RED 16 AWG. 120 VAC INPUT, INSERT EXTERNAL POWER CORD HERE. NOTES: NEMA 5-15, 15A, 120 VAC, P/N EE6176 (HBL5278C/HUBBLE RECEPTACLE).

  • Page 97: Engine Block Heater Wiring Diagram

    ENGINE BLOCK HEATER WIRING DIAGRAM BLACK 14 AWG. LINE (L)120VAC INPUT WHITE 14 AWG. NEUTRAL (N) GREEN 14 AWG. GROUND (G) ENGINE BLOCK HEATER TEMP. BLACK 14 AWG. SWITCH LINE (L)120VAC INPUT HEATING 120 VAC WHITE 14 AWG. ELEMENT NEUTRAL (N) GREEN 14 AWG.

  • Page 98: Appendix

    APPENDIX TOUCH DISPLAY UNIT DIGITAL ICONS 9/30/2020 - 5:45:07 PM Figure 210. Status Bar Table 20. Status Bar Icons Item Description Fuel Level Indicates the current fuel level. Running Hours Indicates the total running hours. Date and Time Indicates the controller date and time. Language Press to open Language (shortcut).
  • Page 99 APPENDIX 9/05/2019 - 12:46:16 255 h ISLAND SEMI Active Power (P) GEN Apparent Power (S) GEN 1 / 7 GEN Voltage L3-L1 GEN Frequency L1 CAN ID: 1 0.00 Priority: 1 Figure 211. Home Screen (1 of 7) Table 21. Home Screen Icons Item Description Settings...
  • Page 100 APPENDIX 9/30/2020 - 5:45:16 PM EIC Engine Speed (SPN) DG BLOCKED FOR START Auto. Mains Island operation Peak shaving Failure EIC Engine Oil Pressure 0.00 Mains Power Fixed Power Load take over Export 2 / 7 EIC Engine Coolant Power Remote Dry alternator management...
  • Page 101 APPENDIX 9/30/2020 - 5:45:20 PM GEN Voltage L1-L2 DG BLOCKED FOR START BB Voltage L1-L2 480 V 480 V 60.0 Hz 60.0 Hz 3 / 7 GEN Frequency L1 0.00 240 V 208 V 60.0 Hz 60.0 Hz Busbar Frequency L1 0.00 Figure 213.
  • Page 102 APPENDIX 9/30/2020 - 5:45:24 PM GEN Voltage L1-L2 ISLAND SEMI 1000 1000 1000 GEN Voltage L2-L3 4 / 7 GEN Voltage L3-L1 Phi BB L1-DGL1 -180.0 G V L1-L2 G V L2-L3 G V L3-L1 deg. Figure 214. Output Voltage Status Screen (4 of 7) Table 24.
  • Page 103 APPENDIX 9/30/2020 - 5:45:28 PM Current L1 ISLAND SEMI 1200 1200 1200 Current L2 5 / 7 Current L3 Active Power (P) GEN Current L1 Current L2 Current L3 Figure 215. Generator Amperage Screen (5 of 7) Table 25. Generator Amperage Screen Icons Item Description Menu...
  • Page 104 APPENDIX 9/30/2020 - 5:45:32 PM Active Power (P) GEN ISLAND SEMI 2500 2000 Apparent Power (S) GEN 1500 6 / 7 1000 Reactive Power (Q) GEN 180.0 90.00 1800 kVAR 0.80 EIC Coolant EIC Engine Oil EIC speed temperature Pressure Figure 216.
  • Page 105 APPENDIX 9/30/2020 - 5:45:36 PM GEN Voltage L1-L2 SYNCHRONIZING BB Voltage L1-L2 7 / 7 GEN Frequency L1 60.10 -0.5 -1.0 Busbar Frequency L1 60.10 df [Hz] dV [%] Figure 217. Synchronization Status Screen (7 of 7) Table 27. Synchronization Status Screen Icons Item Description Menu...
  • Page 106 APPENDIX 9/30/2020 - 5:45:23 PM Figure 218. Main Menu Screen Table 28. Main Menu Screen Icons Item Description Home Press to return to the Home screen. Alarm Press to view Alarm(s). Logs Press to view logs. Service Press to view the Service Menu. Setup Press to view the Setup screen.
  • Page 107 APPENDIX 9/30/2020 - 5:47:22 PM Figure 219. Controller Settings Groups Screen Table 29. Controller Settings Groups Screen Icons Item Description Back Press to return to the previous display. Protection Press to view a list (group) of controller Protection settings. Synchronization Press to view a list (group) of controller Synchronization settings.
  • Page 108 APPENDIX 9/30/2020 - 5:46:31 PM Easy connect appl. Figure 220. Supervision Screen Table 30. Supervision Screen Icons Item Description Menu Press to view the Menu screen. Displays the system state. Live System Overview NOTE: Actual system shown depends on your plant configuration. Figure 221.
  • Page 109 APPENDIX Figure 222. Value Keyboard Table 32. Value Keyboard Icons Item Description Value Displays the value you are entering. Cancel Press to cancel the changes. Backspace Press to delete the last character. Forward Delete Press to delete the next character. Enter Press to confirm the value entered.
  • Page 110 APPENDIX Figure 223. Passcode Keypad Table 33. Passcode Keypad Icons Item Description Value Displays the value you are entering. Cancel Press to cancel the changes. Backspace Press to delete the last character. Forward Delete Press to delete the next character. Enter Press to confirm the value entered.
  • Page 111 APPENDIX 9/30/2020 - 5:45:45 PM A1 - Single DG/ 480V-3PH-60Hz Auto Mode Island Analog LS Series Wye A2 - 50/50 Power 460V-3PH-60Hz Semi-Auto Mode Loadshare CAN Management Series Wye 208V-3PH-60Hz A3 - EZ Connect Fixed Power Parallel Wye A4 - Fixed Power EZ Connect Setup 240V-3PH-60Hz to Mains...
  • Page 112 APPENDIX 9/30/2020 - 5:45:56 PM Diagnostic Mode Manual Purge Manual Mode Active Active ECU Activated Low Idle Speed Manual Purge E- Inhibited IDSS Activated Force Purge Activated Analog Loadshare Active Enter Diagnostic Enter Isuzu Voltage UP Enter Manual Mode Escape Mode [Manual Mode] Mode Voltage DOWN...
  • Page 113 APPENDIX 9/30/2020 - 5:46:44 PM 7531 Internal COM ID 1 / 1 Search Results Figure 226. Controller Settings List Screen Table 36. Controller Settings List Screen Icons Item Description Edit Press to edit the setting. Scroll Page Right Press to scroll the page to the right. Scroll Page Left Press to scroll the page to the left.
  • Page 114 APPENDIX 9/30/2020 - 5:47:22 PM 7351 Int. comm. ID Setpoint Enable High Alarm Inverse Proportional Auto-Acknowledge Figure 227. Edit Internal Communication ID Screen Table 37. Edit Internal Communication ID Screen Icons Item Description Setting Displays the name of the current setting. Cancel Press to cancel the changes.
  • Page 115 APPENDIX 9/05/2019 - 12:46:16 255 h Figure 229. Alarm Screen Table 39. Alarm Screen Icons Item Description Indicates the current state of the alarm: Alarm State Acknowledged alarm. Unacknowledged alarm. Acknowledge Press to acknowledge alarm. Alarm Settings Press to view the alarm configuration. Alarm List Swipe to scroll the alarm list up or down.
  • Page 116 APPENDIX 9/30/2020 - 5:45:45 PM Figure 230. Exhaust After-Treatment Dashboard Screen Table 40. Exhaust After-Treatment Dashboard Screen Icons Item Description Minimum DEF Level (%) Displays the minimum level for the diesel exhaust fluid. Diesel Exhaust Fluid Level (%) Indicates the current level of the diesel exhaust fluid. Diesel Particle Filter (DPF) Inhibit Not used with this engine model.
  • Page 117 NOTES DCA400SSI4F3PD 60 HZ GENERATOR • OPERATION MANUAL — REV. #4 (05/20/25) — PAGE 117...

  • Page 118: Here's How To Get Help

    © COPYRIGHT 2025, MULTIQUIP INC. Multiquip Inc ., the MQ logo and the MQ Power logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other trademarks are the property of their respective owners and used with permission.

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