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Generac Power Systems CorePower 6/7 kW 60 Hz Diagnostic Repair Manual
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Generac Power Systems CorePower 6/7 kW 60 Hz Diagnostic Repair Manual

Generac Power Systems CorePower 6/7 kW 60 Hz Diagnostic Repair Manual

Home standby generator
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DIAGNOSTIC
REPAIR
MANUAL
CorePower™ Home Standby Generator
50 & 60 Hz PowerPact™ Home Standby Generator
MODELS:
CorePower 6/7 kW 60 Hz
PowerPact 6/7 kW 60 Hz
PowerPact 6/7.5 kW 60 Hz
PowerPact 5.6 kVA 50 Hz
S TA N D B Y G E N E R AT O R S

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Summary of Contents for Generac Power Systems CorePower 6/7 kW 60 Hz

  • Page 1 MANUAL CorePower™ Home Standby Generator 50 & 60 Hz PowerPact™ Home Standby Generator MODELS: CorePower 6/7 kW 60 Hz PowerPact 6/7 kW 60 Hz PowerPact 6/7.5 kW 60 Hz PowerPact 5.6 kVA 50 Hz S TA N D B Y G E N E R AT O R S...
  • Page 2 Foreword SAFETY READ THIS MANUAL THOROUGHLY Throughout this publication, DANGER, WARNING, and CAUTION This diagnostic manual has been written and published by Generac blocks are used to alert the operator to special instructions to aid our dealers' technicians and company service personnel concerning a particular service or operation that might be hazardous when servicing the products described herein.
  • Page 3 Contents Safety ...................ii Battery ..............22 Service Schedule - Corepower ........22 Read This Manual Thoroughly ..........ii Service Schedule - Powerpact ........23 Specifications ................4 Section 1.7 – General Troubleshooting........24 Generator ..............4 Introduction ..............24 Engine ................ 4 Recommended Tools ..........
  • Page 4 Contents Part 4 – Engine/DC Control ............59 Setting Priorities ............44 Tests ..............44 Section 4.1 – Description And Components ......60 Troubleshooting ............45 General ..............60 Section 3.2 – Operational Analysis .......... 46 Terminal Strip / Interconnection Terminal Utility Voltage Present ..........
  • Page 5 Contents Check Compression ........... 84 Test 67 – Check Ignition Coil ........84 Test 68A – Check Oil Pressure Switch and Wire 86 (CorePower Only) ......... 85 Test 68B – Check Oil Level Switch and Wire 86 (PowerPact Only) .......... 86 Test 69 –...
  • Page 6 Specifications Note: Specifications are for reference only. For actual installations always use the most recent version available online. These specifications are subject to change without notice. Generator CorePower 6/7 kW PowerPact 6/7 kW PowerPact 6/7.5 kW PowerPact 5.6 kVA Rated Voltage Rated Maximum Load Current (Amps) at 29.2 29.2...
  • Page 7 Specifications Fuel Consumption Natural Gas* LP Vapor** Unit 1/2 Load Full Load 1/2 Load Full Load CorePower 6/7 kW 66/1.87 119/3.37 0.82/30/3.10 1.47/53/5.56 PowerPact 6/7 kW 73/2.07 117/3.31 0.73/26.2/2.75 1.3/46.8/4.9 PowerPact 6/7.5 kW PowerPact 5.6 kVA 81/2.29 120/3.42 0.67/ 24.4/ 2.54 1.14/ 41.5/ 4.32 * Natural gas is in cubic feet/cubic meters per hour.
  • Page 8 Specifications INTERCONNECTIONS - COREPOWER Page 6...
  • Page 9 Specifications INTERCONNECTIONS - POWERPACT (60 HZ) Page 7...
  • Page 10 Specifications INTERCONNECTIONS - POWERPACT (50 HZ) Page 8...
  • Page 11 PART 1 - GENERAL INFORMATION Section 1.1 – Generator Basics ..........10 Section 1.5 – Automatic Operating Parameters ....... 19 Introduction ..............10 Introduction ..............19 Parts ..............10 Utility Failure ............... 19 Generator Identification ..........10 Cranking ..............19 Cranking Conditions ...........
  • Page 12 Section 1.1 PART 1 GENERAL INFORMATION Generator Basics INTRODUCTION GENERATOR IDENTIFICATION This diagnostic repair manual has been prepared especially for Data Plate familiarizing service personnel with the testing, troubleshooting The data plate that is affixed to the generator contains important and repair of the vertical home standby systems.
  • Page 13 Section 1.2 Section 1.2 PART 1 PART 1 GENERAL INFORMATION GENERAL INFORMATION Measuring Electricity Installation Basics METERS MEASURING AC VOLTAGE Devices used to measure electrical properties are called meters. An accurate AC voltmeter or a VOM may be used to read the Meters are available that allow one to measure (a) AC voltage, (b) generator’s AC output voltage.
  • Page 14 Section 1.2 PART 1 GENERAL INFORMATION Measuring Electricity MEASURING CURRENT In-Line Alternatively, to read the current flow in AMPERES, an in-line Clamp-On ammeter may be used. Most Digital Volt-Ohm-Meters (VOM) will have the capability to measure amperes. To read the current flow, in AMPERES, a clamp-on ammeter may be used.
  • Page 15 Section 1.2 PART 1 GENERAL INFORMATION Measuring Electricity Component testing may require a specific resistance value or a test for INFINITY or CONTINUITY. Infinity is an OPEN condition The OHM is the unit of RESISTANCE. In every circuit there is a between two electrical points, which would read as no resistance, natural resistance or opposition to the flow of electrons.
  • Page 16 Section 1.3 PART 1 GENERAL INFORMATION Preparation Before Use INTRODUCTION FUEL CONSUMPTION It is the responsibility of the installer to ensure that the Generator Natural Gas* LP Vapor** installation was performed properly. A careful inspection must be Unit 1/2 Load Full 1/2 Load Full Load...
  • Page 17 Section 1.3 PART 1 GENERAL INFORMATION Preparation Before Use Figure 9. Throttle Assembly - PowerPact Obtain the fuel jet for Propane (Smaller ID that has been supplied loose with the owners manual). Verify that the O-ring, supplied loose with the owners manual is installed, into the groove of the fuel jet.
  • Page 18 Section 1.4 PART 1 GENERAL INFORMATION Operating Instructions Note: Loss of utility power will cause either the AUTO or OFF CONTROL PANEL or MANUAL buttons to flash. Whichever mode the generator is in at the time of utility loss. WARNING! With the controller set to AUTO, the engine BEFORE INITIAL START-UP ...
  • Page 19 Section 1.4 PART 1 GENERAL INFORMATION Operating Instructions If the sequence is CORRECTLY entered, all the LEDs will To select automatic operation scroll from bottom to top 5 times. The OFF button will light. The following procedure applies only to those installations which The activation process has been performed successfully and utilize an air-cooled generator in conjunction with a transfer switch.
  • Page 20 Section 1.4 PART 1 GENERAL INFORMATION Operating Instructions Set the generator MLCB to the OPEN position. Allow the generator to run at no-load for several minutes to cool down. Set the generator controller to the OFF mode. Locate a means of Utility disconnect and set it to the OFF position.
  • Page 21 Section 1.5 PART 1 GENERAL INFORMATION Automatic Operating Parameters INTRODUCTION If the unit does not start during the crank sequence, the control panel Overcrank Alarm LED will illuminate. When the generator is installed in conjunction with a transfer switch, either manual or automatic operation is possible. Note: During a rest cycle the start and fuel outputs are de- energized and the magneto output is shorted to ground.
  • Page 22 Section 1.5 PART 1 GENERAL INFORMATION Automatic Operating Parameters LOAD TRANSFER PARAMETERS Exercise • Exercise will not function if the generator is already running in The transfer of load when the generator is running is dependent either AUTO or MANUAL mode. upon the operating mode as follows: •...
  • Page 23 Section 1.6 PART 1 GENERAL INFORMATION General Maintenance INTRODUCTION VISUAL INSPECTION Performing proper maintenance on a Generator will ensure proper During all service intervals, a proper visual inspection must be function during a Utility failure. Once a Generator has failed, it is conducted to ensure proper function, airflow, and to prevent fire already too late.
  • Page 24 Section 1.6 PART 1 GENERAL INFORMATION General Maintenance valve clearance and adjust as necessary. Checking of the engine BATTERY valve clearance thereafter periodically will increase reliability of Performing proper battery maintenance at the required intervals will the Generator. Refer to Test 70 for Specification and adjustment allow for proper starting of the Generator during a power outage.
  • Page 25 Section 1.6 PART 1 GENERAL INFORMATION General Maintenance SERVICE SCHEDULE - POWERPACT SYSTEM/COMPONENT PROCEDURE FREQUENCY X = Action W = Weekly R = Replace as Necessary Inspect Change Clean M = Monthly * = Notify Dealer if Repair is Needed. Y = Yearly FUEL Fuel lines and connections*...
  • Page 26 Section 1.7 PART 1 GENERAL INFORMATION General Troubleshooting INTRODUCTION Recommended Tools Check List This section familiarizes the service technician with the p General Mechanics Tool Box manufacturer recommended procedures for the testing and p A Meter Capable of Measuring Frequency (Hz), AC & DC volts, evaluation of various problems that can occur on the standby DC amps, and Ohms generators.
  • Page 27 PART 2 - AC GENERATORS Section 2.1 – Description and Components......26 Section 2.4 – Diagnostic Tests ..........32 Introduction ..............26 Introduction ..............32 Engine-Generator Drive System ......... 26 Safety ..............32 Alternator Assembly ............ 26 AC Troubleshooting ............ 32 Brush Holder and Brushes ..........
  • Page 28 Section 2.1 PART 2 AC GENERATORS Description and Components INTRODUCTION The alternator contained within the generator is a revolving field (rotor) type with a stationary armature (stator), and excitation to the field provided through brushes and slip rings (direct excitation). The generator may be used to supply electrical power for the STATOR operation of the 120 and/or 240 VAC, 1-phase, 60 Hz, AC loads.
  • Page 29 Section 2.1 PART 2 AC GENERATORS Description and Components BRUSH HOLDER AND BRUSHES Main Line Circuit Breaker The main line circuit breaker protects the generator against Attached to the lower bearing carrier, the brush holder and electrical overload. Refer to “Specifications” section for the specific brushes allow for electrical connection to the rotor.
  • Page 30 Section 2.2 PART 2 AC GENERATORS Operational Analysis STARTUP slip ring. This excitation voltage flows through the rotor windings and through the negative (-) slip ring and brush on the negative When the engine is started, permanent magnets embedded in (-) wire.
  • Page 31 Section 2.2 PART 2 AC GENERATORS Troubleshooting Flow Charts INTRODUCTION Use the “Flow Charts” in conjunction with the detailed instructions in Section 2.4. Test numbers used in the flow charts correspond to the numbered tests in Section 2.4. The first step in using the flow charts is to identify the correct problem on the following pages. For best results, perform all tests in the exact sequence shown in the flow charts.
  • Page 32 Section 2.3 PART 2 AC GENERATORS Troubleshooting Flow Charts Problem 1 – Generator Produces Zero Voltage or Residual Voltage (Continued) TEST 4 – PERFORM FIXED EXCITATION / ROTOR AMP DRAW TEST 9 – TEST STATOR GOOD TEST 6 – TEST 9 – TEST RESISTANCE CHECK STATOR OF ROTOR AND...
  • Page 33 Section 2.3 PART 2 AC GENERATORS Troubleshooting Flow Charts Problem 3 – Generator Produces High Voltage at No-Load Problem 3 – Generator Produces High Voltage at No-Load TEST 11 – CHECK TEST 12 – CHECK TEST 13 – ADJUST AC OUTPUT AC OUTPUT ENGINE HIGH...
  • Page 34 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests INTRODUCTION Procedure The generator main circuit breaker is located in the external This section familiarizes the service technician with acceptable customer connection box. If loads are not receiving power, make procedure for the testing and evaluation of various problems that sure the breaker is set to “On”...
  • Page 35 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests NOTE: Depending on the model being serviced, starting and 14. Start the engine in MANUAL mode (Refer to note above). stopping the engine is performed differently. Refer to the fol- Allow the engine to start and run. lowing to start or stop the engine in this procedure.
  • Page 36 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests Note: To calculate rotor amp draw take the battery voltage the Red Wire. applied, divided by the actual resistance reading of the rotor. 22. Set the VOM to measure DC amperage. Note: be sure To determine actual rotor resistance, refer to “Step 4”...
  • Page 37 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests TEST 6 – RESISTANCE CHECK OF ROTOR Inspect the rotor slip rings. If their appearance is dull or tarnished, polish with a fine grade abrasive material. AND ROTOR CIRCUIT Procedure A Locate and disconnect the Red (Wire 4) and White (Wire Do not use metallic grit to polish slip rings.
  • Page 38 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests Stator Resistances – CorePower Power Windings White/Blue 0.173 Ohms White/Black 0.173 Ohms STATOR Blue/Black 0.346 Ohms BLUE Sensing Winding Green/White 0.064 Ohms DPE Winding Blue/Blue 1.158 Ohms Figure 25. CorePower Stator Lead Connections Stator Resistances –...
  • Page 39 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests Note: Stator winding resistance values are very low and Table 8. Test Points – Shorted Condition (CorePower) some VOM’s will not read such a low resistance, and will simply indicate CONTINUITY. The manufacturer recommends Test Point A Test Point B a high quality digital type meter capable of reading a very...
  • Page 40 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests If the voltage reading is higher than residual, but is lower PROCEDURE - CorePower than the stated limits, go to Test 12. Ensure throttle rod and anti-lash spring are moving freely by If a high voltage is indicated, go on to Test 12.
  • Page 41 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests Figure 29. Set Governor Arm and Shaft by rotating the arm in the direction shown to the wide open throttle position. Rotate the Shaft counter-clockwise until it stops. (See Figure 30) Figure 31. TEST 14 –...
  • Page 42 Section 2.4 PART 2 AC GENERATORS Diagnostic Tests Adjusting screw clockwise will increase voltage, adjusting TEST 16 – CHECK VOLTAGE AND counterclockwise will lower the voltage. FREQUENCY UNDER LOAD Results Discussion If no change in voltage while adjusting refer back to flow It is possible for the generator AC output frequency and voltage chart.
  • Page 43 PART 3 - TRANSFER SWITCH Section 3.1 – Description and Components......42 Section 3.4 – Diagnostic Tests ..........50 General ..............42 Introduction ..............50 Enclosure ..............42 Safety ..............50 EZ Transfer Operator (GenReady Switch Only) ..42 Transfer Switch Troubleshooting ....... 50 Fuse Holder ..............
  • Page 44 Section 3.1 PART 3 TRANSFER SWITCH Description and Components GENERAL VAC for the battery charging. The charger maintains battery voltage anytime the load terminals have voltage available. The 50 amp transfer switch is designed to operate in conjunction with all product which utilizes the Wire 194/15B and Wire 23 control systems.
  • Page 45 Section 3.1 PART 3 TRANSFER SWITCH Description and Components The modules can be set to a load priority between 1 and 8 or Table 12. Priority Dial Settings be set in a lock out only mode for loads that do not need to run Priority Recovery Time during a power outage, which reduces the necessary size of the...
  • Page 46 Section 3.1 PART 3 TRANSFER SWITCH Description and Components TESTS Table 15. Electrical Specifications Input Voltage 240 VAC Utility Test Current Rating 50A resistive, 40A inductive Turn utility power ON and enable all module feeding circuits. Locked Rotor Amp Rating 240A Verify LED begins to flash at one second intervals.
  • Page 47 Section 3.1 PART 3 TRANSFER SWITCH Description and Components TROUBLESHOOTING Return to Utility Test 1. Return utility power by setting the MLCB (service disconnect) See troubleshooting flowcharts. to ON. a. All modules should begin flashing at one second intervals. b. All modules will recover in five minutes (including units with lockout switch enabled).
  • Page 48 Section 3.2 PART 3 TRANSFER SWITCH Operational Analysis UTILITY VOLTAGE PRESENT 7 close completing a path for current to flow to the servo motor. • The servo motor will operate till LS2 is mechanically opened, When Utility voltage is present, the circuit may be briefly described interrupting the current flow to the servo motor.
  • Page 49 Section 3.3 PART 3 TRANSFER SWITCH Troubleshooting Flowcharts INTRODUCTION Use the “Flow Charts” in conjunction with the detailed instructions in Section 3.4 for the GenReady switch with CorePower and the 50A Switch with PowerPact. Test numbers used in the flow charts correspond to the numbered tests in Section 3.4. The first step in using the flow charts is to identify the correct problem on the following pages.
  • Page 50 Section 3.3 PART 3 TRANSFER SWITCH Troubleshooting Flowcharts Problem 12 – Blown F1 or F2 Fuse Problem 12 – Blown F1 or F2 Fuse TEST 33 – CHECK TEST 32 – CHECK INSPECT/REPLACE GOOD FUSE F1 & F2 N1 & N2 WIRING CONTROLLER GOOD FINISH...
  • Page 51 Section 3.3 PART 3 TRANSFER SWITCH Troubleshooting Flowcharts SMM Problem 2 – Load Management Module (SMM) LED is ON, Load Not Powered SMM Problem 2 – Load Management Module (SMM) LED is ON, Load Not Powered SMM LED ON – TEST 37 –...
  • Page 52 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests INTRODUCTION TEST 26 – CHECK MANUAL TRANSFER SWITCH OPERATION This section familiarizes the service technician with acceptable procedure for the testing and evaluation of various problems that Discussion can occur on pre-packaged transfer switches. Use this section in conjunction with Section 3.3, “Troubleshooting Flow Charts.”...
  • Page 53 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests Repeat Step 5 several times. When the contactor lever TEST 29 – CHECK 15B/194 CIRCUIT is moved, slight force should be needed until the lever Procedure reaches its center position. As the lever moves past its “over center”...
  • Page 54 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests Connect one meter test lead to Wire 23 on the customer Procedure connection block and the other meter test lead to Wire 15B. On the generator panel, set the controller to the OFF mode. a.
  • Page 55 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests TEST 33 – CHECK N1 AND N2 WIRING Procedure On the generator panel, set the controller to the OFF mode. Discussion A shorted Wire N1 or N2 to ground can cause fuse F1 or F2 to blow. Disconnect Utility from the transfer switch.
  • Page 56 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests Place the meter leads across the load (output) terminals and Procedure record the voltage. Set the controller to the OFF mode and remove the 7.5 amp fuse. Results Remove F1, F2, F3 and F4 from the fuse holder in the If the meter indicated less than approximately 240 VAC in transfer switch.
  • Page 57 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests TEST 40 – CHECK UTILITY VOLTAGE AT Procedure TRANSFER SWITCH With utility source voltage available to terminal lugs N1 and N2, use a VOM to test for utility source line-to-line voltage across terminal locations N1 and N2 terminals.
  • Page 58 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests Figure 46. Interconnection Diagram - CorePower Page 56...
  • Page 59 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests Figure 47. Interconnection Diagram - PowerPact (60 Hz) Page 57...
  • Page 60 Section 3.4 PART 3 TRANSFER SWITCH Diagnostic Tests Figure 48. Interconnection Diagram - PowerPact (50 Hz) Page 58...
  • Page 61 PART 4 - ENGINE/DC CONTROL Section 4.1 – Description And Components ......60 Section 4.5 – Diagnostic Tests ..........75 General ..............60 Introduction ..............75 Terminal Strip / Interconnection Terminal Safety ..............75 (Corepower Only) .......... 60 Engine/DC Troubleshooting ........75 Controller ..............
  • Page 62 Section 4.1 PART 4 ENGINE/DC CONTROL Description and Components GENERAL An 18-pin and a 4-pin connector are used to interconnect the controller with the various circuits of the DC systems. Connector This section will familiarize the reader with the various components pin numbers, associated wires and circuit functions are listed in that make up the DC control system.
  • Page 63 Section 4.1 PART 4 ENGINE/DC CONTROL Description and Components J2 CONNECTOR J1 CONNECTOR (CONTROLLER END) (CONTROLLER END) 10 11 12 13 14 15 16 17 18 J2 CONNECTOR J1 CONNECTOR (HARNESS END) (HARNESS END) N1/N2 CONNECTOR N1/N2 CONNECTOR (CONTROLLER END) (HARNESS END) Figure 51.
  • Page 64 Section 4.1 PART 4 ENGINE/DC CONTROL Description and Components J5 CONNECTOR J4 CONNECTOR (CONTROLLER END) (CONTROLLER END) J5 CONNECTOR J4 CONNECTOR (HARNESS END) (HARNESS END) Figure 52. PowerPact Controller Pin Descriptions 6/7 kW PowerPact Connector Pin Descriptions WIRE CIRCUIT FUNCTION WIRE CIRCUIT FUNCTION J4-1...
  • Page 65 Section 4.2 PART 4 ENGINE/DC CONTROL Engine Protective Devices ALARMS RPM Sensor Loss (Shutdown Alarm) During cranking, if the controller does not see a valid RPM signal Low Oil Pressure (Shutdown Alarm) - CorePower within three (3) seconds, it will shut down and lock out on RPM sensor loss.
  • Page 66 Section 4.3 PART 4 ENGINE/DC CONTROL Operational Analysis - CorePower UTILITY SOURCE AVAILABLE - COREPOWER Utility voltage is available to the transfer switch terminals N1/N2 and the transfer switch in the normal utility position. Utility sensing voltage is delivered to the controller via Wires N1/N2 from a transfer switch. This voltage is 240 VAC sensing voltage only for the controller.
  • Page 67 Section 4.3 PART 4 ENGINE/DC CONTROL Operational Analysis - CorePower When the utility sensing voltage drops out the controller will start a 10 second timer. If the voltage does not return fully of is below 60 percent of normal the generator will start to crank. The controller action delivers 12 VDC to the starter contactor via Wire 56.
  • Page 68 Section 4.3 PART 4 ENGINE/DC CONTROL Operational Analysis - CorePower UTILITY FAILURE AND ENGINE RUNNING - COREPOWER The generator is running, the controller’s engine warm up timer is timing out and the generator is producing AC voltage. 12 VDC is delivered to the actuator motor (in the EZ Transfer Operator) via Wire 15B. This 12 VDC circuit is completed back to the controller via Wire 23.
  • Page 69 Section 4.3 PART 4 ENGINE/DC CONTROL Operational Analysis - PowerPact UTILITY SOURCE AVAILABLE - POWERPACT Utility voltage is available to the transfer switch terminals N1/N2 and the transfer switch in the normal utility position. Utility sensing voltage is delivered to the controller via Wires N1/N2 from a transfer switch. Sensing voltage only for the controller is: •...
  • Page 70 Section 4.3 PART 4 ENGINE/DC CONTROL Operational Analysis - PowerPact UTILITY FAILURE AND ENGINE CRANKING - POWERPACT When the utility sensing voltage drops out, the controller will start a 5 second timer. If utility voltage does not return or is below 60 percent of nominal, the generator will start to crank.
  • Page 71 Section 4.3 PART 4 ENGINE/DC CONTROL Operational Analysis - PowerPact UTILITY FAILURE AND ENGINE RUNNING - POWERPACT The generator is running, the controller’s engine warm up timer is timing out and the generator is producing AC voltage. 12 VDC is delivered to the Transfer Relay (TR1) via Wire 194. This 12 VDC circuit is completed back to the controller via Wire 23. When the engine warm up timer expires, the controller will take Wire 23 to ground to energize the transfer relay.
  • Page 72 Section 4.4 PART 4 ENGINE/DC CONTROL Troubleshooting Flowcharts Problem 20 – Engine Will Not Crank When Utility Power Source Fails Problem 20 – Engine Will Not Crank When Utility Power Source Fails TEST 52 – CHECK TEST 53 – TRY A SWITCH IS VERIFY UTILITY POSITION OF...
  • Page 73 Section 4.4 PART 4 ENGINE/DC CONTROL Troubleshooting Flowcharts Problem 22 – Engine Cranks but Won’t Start Problem 22 – Engine Cranks but Won’t Start TEST 60 – CHECK TEST 61 – CHECK TEST 62 – CHECK GOOD GOOD FUEL SUPPLY AND CONTROLLER FUEL SOLENOID PRESSURE...
  • Page 74 Section 4.4 PART 4 ENGINE/DC CONTROL Troubleshooting Flowcharts Problem 23 – Engine Starts Hard and Runs Rough / Lacks Power / Backfires Problem 23 – Engine Starts Hard and Runs Rough / Lacks Power / Backfires IF RECONFIGURED TO LP GAS, TEST 60 –...
  • Page 75 Section 4.4 PART 4 ENGINE/DC CONTROL Troubleshooting Flowcharts Problem 24 – Shutdown Alarm/Fault Occurred Problem 24 – Shutdown Alarm/Fault Occurred CHECK FAULT LIGHTS PROCEED TO PROBLEM 22 OVERCRANK CHECK INSTALLATION FOR TEST 69 – CHECK HIGH PROPER AIRFLOW OR OIL TEMPERATURE HIGH TEMP REPLACE DEFECTIVE SWITCH SWITCH...
  • Page 76 Section 4.4 PART 4 ENGINE/DC CONTROL Troubleshooting Flowcharts Problem 25 – 7.5 Amp Fuse (F1) Blown Problem 25 – 7.5 Amp Fuse (F1) Blown FUSE BLOWS WHEN TEST 73 – CHECK PLACED IN “AUTO” CRANKING AND OR “MANUAL” RUNNING CIRCUITS Problem 26 –...
  • Page 77 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests INTRODUCTION ENGINE/DC TROUBLESHOOTING This section familiarizes the service technician with acceptable It is always good practice to continue to ask questions during the procedures for the testing and evaluation of various problems that troubleshooting process.
  • Page 78 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests TEST 54 – TEST AUTO OPERATIONS Procedure With the controller set to the AUTO mode, test automatic Discussion operation. Testing of automatic operation can be accomplished by turning off the Utility power supply to the transfer switch. When Initial Conditions: The generator is in AUTO, ready to run, and the the utility power is turned off, the standby generator should crank transfer switch is running on Utility.
  • Page 79 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests TEST 56 – CHECK BATTERY AND CABLES and cables would be ideal, most of them will contain at least some voltage drop. The maximum voltage readings you Discussion should see are as follows: Battery power is used to (a) crank the engine and (b) to power the a.
  • Page 80 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Note: Use of a quality Conductance Battery Tester is also 1220 recommended. 1230 D. Test Battery State of Charge: LIQUID (Non-Maintenance Free Battery Only) 1240 LEVEL 1250 1260 USE A TEMPERATURE COMPENSATED 1270 80°...
  • Page 81 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Results If battery voltage is indicated in Step 3 refer back to flow TEST POINT 1 chart. If CONTINUITY is not measured in Step 5, repair or WHITE replace Wire 56. TEST 58 – TEST STARTER CONTACTOR TEST POINT 2 STARTER STARTER...
  • Page 82 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Set the AUTO-OFF-MANUAL Switch to its “MANUAL” position and • Minimum recommended gaseous fuel pressure at the genera- tor fuel inlet connection is 5 inches water column for natural observe the meter. Meter should indicate battery voltage, starter gas (NG) or 10 inches water column for LP gas.
  • Page 83 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests If generator starts but runs rough or lacks power, repeat the Set the controller to the MANUAL Mode. above procedure with the generator running and under load. Proper gas pressure should be measured during cranking. If The fuel system must be able to maintain 10-12 inches water gas pressure is measured, the fuel solenoid is operating.
  • Page 84 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests does not cycle, verify that the choke can be manually closed. Results There should be no binding or interference. If battery voltage was not measured in Step 7 and wire continuity is good, replace the controller. If Choke Solenoid coil resistance is not measured in Step 9, replace the Choke Solenoid.
  • Page 85 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Results Clean and re-gap, or replace plugs as necessary, then re-test. If spark plugs are good or have been replaced, refer back to flow chart. Figure 72. Checking Spark Plug Gap NORMAL MISFIRES Figure 71.
  • Page 86 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests CYLINDER LEAK DOWN TEST CHECK COMPRESSION Discussion Discussion The Cylinder Leak Down Tester checks the sealing (compression) Lost or reduced engine compression can result in a failure of the ability of the engine by measuring air leakage from the combustion engine to start, or a rough operation.
  • Page 87 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Major components of the ignition system include (a) the ignition coil assembly, (b) the spark plug, and (c) the engine flywheel. Solid-state components encapsulated in the ignition coil are not accessible and cannot be serviced. If the coil is defective, the entire assembly must be replaced.
  • Page 88 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests b. Connect one test lead to Wire 86 (disconnected from d. Disconnect the J5 Connector from the controller. LOP). Connect the other test lead to Pin Location 4 (Wire e. Connect one test lead to harness Wire 86 (disconnected 86) of the J1 Connector at the controller.
  • Page 89 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests If the switch tested good in Step 4, and a true over Remove spark plug wire and position wire away from plug. temperature condition has not occurred, check Wire 85 for Remove spark plug. a short to ground on Core Power or an open on PowerPact.
  • Page 90 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests TEST 72 – TEST EXERCISE FUNCTION Discussion The following parameters must be met in order for the weekly exercise to occur: • Controller set to AUTO Mode. • Utility Voltage Available Procedure Set the controller to MANUAL Mode.
  • Page 91 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Table 19. Components Resistance Values TEST 74 – CHECK BATTERY CHARGER SUPPLY VOLTAGE Starter Contactor 8Ω Discussion Main Fuel Solenoid 16Ω The battery charger is supplied with 120 VAC. The output of the Transfer Relay 115Ω...
  • Page 92 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests a. If 13.4 VDC is not measured, replace the battery Procedure charger. Refer to Figure 83. b. If 13.4 VDC is measured, the charger is working. Set VOM to measure DC voltage. NOTE: Battery charger voltage will be higher than battery supply voltage.
  • Page 93 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests TEST 79 – CHECK SHUTDOWN WIRE Discussion Circuit board action during shutdown will ground Wire 18. Wire 18 is connected to the Ignition Magneto(s). The grounded magneto will not be able to produce spark. Figure 82.
  • Page 94 Section 4.5 PART 4 ENGINE/DC CONTROL Diagnostic Tests Figure 83. Test 76, 77, and 78 Test Points - CorePower Page 92...
  • Page 95 PART 5 - DISASSEMBLY Section 5.1 – Major Disassembly - Corepower ......94 Section 5.2 – Major Disassembly - Powerpact ...... 100 Section 5.3 – Exploded Views ..........106 Page 93...
  • Page 96 Section 5.1 PART 5 DISASSEMBLY Major Disassembly DISASSEMBLY - COREPOWER Disconnect and remove the battery. Using a 10 mm socket remove the front two enclosures Tools Required: braces. • 7 mm Socket • 8 mm Socket • 10 mm Socket •...
  • Page 97 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Figure 88. Figure 91. Using a 10 mm socket remove the three (3) bolts holding the exhaust housing from the engine support and base. Refer to Figure 89 and 90. Figure 92. Disconnect the red and black brush wires. Figure 89.
  • Page 98 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Figure 97. Figure 94. 12. Disconnect the fuel supply hose from the air box assembly. 10. Disconnect the ground and neutral connections. Figure 98. Figure 95. 13. Disconnect the choke solenoid. 11. Using an 8 mm socket remove the two bolts supporting the muffler.
  • Page 99 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Figure 100. Figure 102. 15. Using a 10 mm socket remove the two bolts connecting 17. Using a 13 mm wrench remove the rotor bolt from the support to the base. alternator. Figure 101. Figure 103.
  • Page 100 Section 5.1 PART 5 DISASSEMBLY Major Disassembly 18. Install a harmonic balancer or steering wheel puller onto the 19. Using a 13 mm socket remove the four stator bolts. fan assembly. Figure 108. Figure 105. Note: Make a note of the orientation of the brush wire exit passage on the stator.
  • Page 101 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Figure 110. Figure 112. Warning! Do not cut the rotor bolt unless you have a  replacement rotor bolt. 22. Rotor Removal: Cut 2.5 inches from the rotor bolt. Slot the end of the bolt to suit a flat blade screwdriver. Slide the rotor bolt back through the rotor and use a screwdriver to screw it into the crankshaft.
  • Page 102 Section 5.2 PART 5 DISASSEMBLY Major Disassembly DISASSEMBLY - POWERPACT d. Remove rubber weather strip seal. Refer to Figure 117. Tools Required • 4 mm, 6 mm and 1/8” Allen Wrench • 7 mm, 8 mm, 10 mm, 13 mm and 16 mm Sockets •...
  • Page 103 Section 5.2 PART 5 DISASSEMBLY Major Disassembly c. Place a second 2x4 wood block as shown in Figure 120 g. Remove divider panel fasteners and carefully remove and 120. divider panel with muffler attached. Refer to Figure 123. Figure 123. Figure 120.
  • Page 104 Section 5.1 PART 5 DISASSEMBLY Major Disassembly d. Unscrew the bearing carrier vibration isolators from the base, leaving them loose in the bearing carrier. Refer to Figure 126. Figure 128. Figure 126. Note: these will be removed as the stator is slid off over rotor.
  • Page 105 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Figure 131. Figure 134. e. Apply torque to the M12x1.75 bolt until taper breaks free. f. Remove rotor and cut-bolt. Assembly Rotor Install: a. Install rotor onto crankshaft and install new rotor bolt (Part No.
  • Page 106 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Torque Values Stator Bolt 6-7 ft-lbs Rotor Bolt 27-33 ft-lbs M5 x 0.8 Screw On Band Clamp 7.5-9 ft-lbs M6 x 1.0 Screw On Band Clamp 14-15 ft-lbs M6 x 1.0 Screw Flange Nuts - Airbox to Cylinder Head 7-8 ft-lbs M8 x 1.0 Nuts - Exhaust to Cylinder Head 20-22 ft-lbs...
  • Page 107 Section 5.1 PART 5 DISASSEMBLY Major Disassembly Page 105...
  • Page 108 Section 5.3 PART 5 DISASSEMBLY Exploded Views - CorePower Control Panel NOTE: Check www.generac.com for the most current, unit specific exploded views Page 106...
  • Page 109 Section 5.3 PART 5 DISASSEMBLY Exploded Views - CorePower ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION COVER,.CUSTOMER CONNECT BOX EYE HASP CNTRL PNL 2008 HSB BOX CUSTOMER CONNECT SCREW PPPH #10 X 1/2" LG BUSHING, SNAP SB-1000-12 CB 0030A 2P 240V 5 BQ2 LB WASHER, LOCK M5 SCREW HHC M5-0.8 X 12 C8.8 WASHER FLAT M5...
  • Page 110 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower EV Powerhead, CorePower NOTE: Check www.generac.com for the most current, unit specific exploded views Page 108...
  • Page 111 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION NUT FLANGE 5116·18 NYLOK SCREW HHTT M6-1.0 X10 VEL CHR EARTH STRAP 3/ax 3/8 EXHAUST SHIELD ALTERNATOR THERMAL SWITCH 255 F VlB MNT 1.3axl.0X5116-18 MXM SCREW PPHM M3.o.5 X 6 SEMS WASHER LOCK SPECIAL 5116 DUCT ALTERNATOR INTAKE...
  • Page 112 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower Enclosure NOTE: Check www.generac.com for the most current, unit specific exploded views Page 110...
  • Page 113 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION ASSY EXHAUST PANEL AIRBOX SIDE ASSY., SNAP BARB W/SCREEN BASE GROMMET,38.1 CROSS SLIT W/HOLE ASSY FRONT PANEL BISQUE ASSY., BACK PANEL ASSY FRONT PANEL GREY WASHER, FLAT1/4-M6 BRACKET, CORNER POST WASHER, LOCK M6-1I4...
  • Page 114 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower Engine NOTE: Check www.generac.com for the most current, unit specific exploded views Page 112...
  • Page 115 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower ITEM QTY. DESCRIPTION SHROUD COVER, FAN STUD, LIFTING STUD, LIFTING SCREEN, FAN COIL ASSY., IGNITION BOLT, FLANGE 6X25 FLYWHEEL, COMPLETE FAN, COOLING PLATE, FAN NUT, SPECIAL M16 CLIP, WIRE HARNESS CRANKCASE, UPPER STARTER BOLT, FLANGE, M8X80 NUT, FLANGE M6...
  • Page 116 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower Air/Fuel System NOTE: Check www.generac.com for the most current, unit specific exploded views Page 114...
  • Page 117 Section 5.2 PART 5 DISASSEMBLY Exploded Views - CorePower ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION ENGINE 432CC GASEOUS 1.8FT LPG HOSE ASSEMBLY SCREW, HHFCS M6·1 X16 G8.8 NUT HEX LOCK M3-0.5 NY INS NUT HEX LOCK M5-0.8 NYINS ZINC BALL STUD,10 MM BRACKET, 432CC GOVERNOR ADJUST ASSY THROTTLE ROD SPRING, GOV MAIN LV432 EHSB...
  • Page 118 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 60 Hz PowerPact Control Panel NOTE: Check www.generac.com for the most current, unit specific exploded views Page 116...
  • Page 119 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 60 Hz PowerPact ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION CONTROLLER FRAME SCREW HHTT M5-0.8X16 CONTROLLER LID SCREW PHTT M3-0.5 X 25 ZINC FRAME, CONDUIT SCREW HHFC M6-1.0 X 30 FTH WELDMENT, DEAD FRONT COVER NUT FLANGE M6-1.0 NYLOK GASKET, FIELD CONNECTION COVER NUT HEX M5-0.8 G8 CLEAR ZINC...
  • Page 120 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 60 Hz PowerPact Powerhead NOTE: Check www.generac.com for the most current, unit specific exploded views Page 118...
  • Page 121 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 60 Hz PowerPact ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION SCREW HHTT M8-1.2 X 12 BP MUFFLER SCREW HHTT M5-0.8 X 16 FLEX PIPE EXH MANI 420CC ROTOR STATOR CLAMP BAND DIA 31-33mm BEARING CARRIER O-RING 50 X 1.5 NITRILE MANIFOLD...
  • Page 122 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 60 Hz PowerPact Enclosure NOTE: Check www.generac.com for the most current, unit specific exploded views Page 120...
  • Page 123 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 60 Hz PowerPact ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION WASHER FLAT M10 HEAVY DUTY ENGINE DIVIDER PNEL WASHER SELF LOCKING 1"DIA 12GA BATTERY ACCESS PANEL GROMMET,38.1 CROSS SLIT W HOLE MIXER ACCESS PANEL PANEL CLIP, M6-1.00 EXPANSION FOAM, ENGINE SCREEN - HSB LOUVERS...
  • Page 124 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 50 Hz PowerPact Control Panel NOTE: Check www.generac.com for the most current, unit specific exploded views Page 122...
  • Page 125 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 50 Hz PowerPact ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION CONTROLLER FRAME 50HZ SCREW HHFC M6-1.0 X 30 FTH CONTROLLER LID NUT TOP LOCK FL M6-1.0 FRAME, CONDUIT NUT FLANGE M6-1.0 NYLOK WELDMENT, DEAD FRONT COVER NUT HEX M5-0.8 G8 CLEAR ZINC GASKET, FIELD CONNECTION COVER WASHER LOCK EXT ¼”...
  • Page 126 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 50 Hz PowerPact Powerhead NOTE: Check www.generac.com for the most current, unit specific exploded views Page 124...
  • Page 127 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 50 Hz PowerPact ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION SCREW HHTT M8-1.2 X 12 BP SM DISP MFLR FULL TUBE INLETS SCREW HHTT M5-0.8 X 16 FLEX PIPE EXH MANI 420CC ROTOR ENGINE MOUNTING BRKT WLDMNT STATOR CLAMP BAND DIA 31-33mm...
  • Page 128 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 50 Hz PowerPact Enclosure NOTE: Check www.generac.com for the most current, unit specific exploded views Page 126...
  • Page 129 Section 5.2 PART 5 DISASSEMBLY Exploded Views - 50 Hz PowerPact ITEM QTY. DESCRIPTION ITEM QTY. DESCRIPTION WASHER FLAT M10 HEAVY DUTY BATTERY ACCESS PANEL WASHER SELF LOCKING 1"DIA 12GA MIXER ACCESS PANEL GROMMET,38.1 CROSS SLIT W HOLE FOAM, ENGINE PANEL CLIP, M6-1.00 EXPANSION EXHAUST DIVIDER PANEL SCREEN - HSB LOUVERS...
  • Page 130 NOTES PART 5 DISASSEMBLY Page 128...
  • Page 131 PART 6 - ELECTRICAL DATA Wiring Diagram – Drawing 0H7182-C (CorePower) ........... 130 Electrical Schematic – Drawing 0H7182-C (CorePower) ........... 131 Wiring Diagram – Drawing 0K7328-C (60 Hz PowerPact 1 of 4) ....... 132 Wiring Diagram – Drawing 0K7328-C (60 Hz PowerPact 2 of 4) ....... 133 Electrical Schematic –...
  • Page 132 Section 6 PART 6 ELECTRICAL DATA Wiring Diagram – Drawing 0H7182-C (CorePower 1 of 2) Page 130...
  • Page 133 Section 6 PART 6 ELECTRICAL DATA Electrical Schematic – Drawing 0H7182-C (CorePower 2 of 2) Page 131...
  • Page 134 Section 6 PART 6 ELECTRICAL DATA Wiring Diagram – Drawing 0K7328-C (60 Hz PowerPact 1 of 4) Page 132...
  • Page 135 Section 6 PART 6 ELECTRICAL DATA Wiring Diagram – Drawing 0K7328-C (60 Hz PowerPact 2 of 4) Page 133...
  • Page 136 Section 6 PART 6 ELECTRICAL DATA Electrical Schematic – Drawing 0K7328-C (60 Hz PowerPact 3 of 4) Page 134...
  • Page 137 Section 6 PART 6 ELECTRICAL DATA Electrical Schematic – Drawing 0K7328-C (60 Hz PowerPact 4 of 4) Page 135...
  • Page 138 Section 6 Section 6 PART 6 PART 6 ELECTRICAL DATA ELECTRICAL DATA Wiring Diagram – Drawing 0K7876-D (50 Hz PowerPact 1 of 4) Page 136...
  • Page 139 Section 6 Section 6 PART 6 PART 6 ELECTRICAL DATA ELECTRICAL DATA Wiring Diagram – Drawing 0K7876-D (50 Hz PowerPact 2 of 4) Page 137...
  • Page 140 Section 6 Section 6 PART 6 PART 6 ELECTRICAL DATA ELECTRICAL DATA Electrical Schematic – Drawing 0K7876-D (50 Hz PowerPact 3 of 4) Page 138...
  • Page 141 Section 6 Section 6 PART 6 PART 6 ELECTRICAL DATA ELECTRICAL DATA Electrical Schematic – Drawing 0K7876-D (50 Hz PowerPact 4 of 4) Page 139...
  • Page 142 Section 6 PART 6 ELECTRICAL DATA Wiring Diagram – Drawing 0K5879-B (50 Amp Transfer Switch 1 of 2) Page 140...
  • Page 143 Section 6 PART 6 ELECTRICAL DATA Wiring Diagram – Drawing 0K5879-B (50 Amp Transfer Switch 2 of 2) Page 141...
  • Page 144 Section 6 PART 6 ELECTRICAL DATA Electrical Schematic – Drawing 0K5881-B (50 Amp Transfer Switch 1 of 2) Page 142...
  • Page 145 Section 6 PART 6 ELECTRICAL DATA Electrical Schematic – Drawing 0K5881-B (50 Amp Transfer Switch 2 of 2) Page 143...
  • Page 146 Electrical Formulas TO FIND KNOWN VALUES 1-PHASE E x I KILOWATTS (kW) Volts, Current, Power Factor 1000 E x I Volts, Current 1000 kW x 1000 AMPERES kW, Volts, Power Factor WATTS Volts, Amps, Power Factor Volts x Amps 2 x 60 x Frequency NO.
  • Page 147 APPENDIX A - SUPPLEMENTAL WORKSHEETS Test 4 Results ................ 146 Test 9 Results - CorePower ........... 147 Test 9 Results - PowerPact ............ 147 Test 73 Results ..............148 Page 145...
  • Page 148 Table 1 APPENDIX A SUPPLEMENTAL WORKSHEETS Test 4 Results Test 4 Results, Serial #_________________________ Test 4 Results, Serial #_________________________ Test Point Results Test Point Results Rotor Resistance Rotor Resistance Ohms Ohms Battery Voltage Battery Voltage Blue to Blue Voltage Blue to Blue Voltage White and Green Voltage White and Green Voltage Static Rotor Amp Draw...
  • Page 149 Tables 10 and 11 APPENDIX A SUPPLEMENTAL WORKSHEETS Test 9 Stator Results Test 9 Results - CorePower Test 9 Results - CorePower Serial #_________________________ Serial #_________________________ Test Point A Test Point B Results Test Point A Test Point B Results Resistance Tests Resistance Tests Stator Lead Blue Wire...
  • Page 150 Table 21 APPENDIX A SUPPLEMENTAL WORKSHEETS Test 73 Results Test 73 Results, Serial #_________________________ Test 73 Results, Serial #_________________________ Test Point Pin Location Circuit Result Test Point Pin Location Circuit Result J2 Pin 4 Wire 14 J2 Pin 4 Wire 14 J2 Pin 11 Wire 56 J2 Pin 11...
  • Page 152 ©2015 Generac Power Systems, Inc. All rights reserved. Specifications are subject to change without notice g e n e r a c . c o m No reproduction allowed in any form without prior written consent from Generac Power Systems, Inc.

This manual is also suitable for:

Powerpact 6/7 kw 60 hzPowerpact 6/7.5 kw 60 hzPowerpact 5.6 kva 50 hz