MULTIQUIP DCA Series - Table of Contents

GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23) — PAGE 3
TABLE OF CONTENTS
DCA6~DCA600 60Hz
Generators, Service and
Troubleshooting Manual
Proposition 65 Warning ........................................... 2
Safety Information ................................................ 4-9
Generator Theory ............................................. 10-15
Heat Rise .......................................................... 16-17
Load Banking/Wet Stacking .................................. 18
Engine/Generator Inspection ................................. 19
Electrical Inspection .......................................... 20-22
Component Identication .................................. 23-29
Current Flow Diagram .......................................... 30
Voltage Flow Diagram .......................................... 31
Rheostat Diagram ................................................. 32
Receptacles Diagram ........................................... 33
Main Armature Windings Resistance Test ........ 34-35
Main Field/Exciter Armature Resistance Test ........ 36
Exciter Field Resistance Test ................................ 37
Manual Excitation Field Voltage Test ..................... 38
Manual Excitation Winding Voltage Test ................ 39
Exciter Field Current Measurement (No Load) ..... 40
Exciter Field Current Measurement (With Load) ... 41
Exciter Field Voltage Measurement (No Load) ..... 42
Exciter Field Voltage Measurement (Load) .......... 43
Rotating Rectier Test ...................................... 44-45
Main Armature AVR Inputs Resistance Check ...... 46
Automatic Voltage Regulator ............................ 47-48
Main Circuit Breaker ......................................... 49-50
ECU 9988N ...................................................... 51-55
Overcurrent Relay (OCR) ................................. 56-57
Voltage Selector Switch .................................... 58-59
Ground Fault Circuit Interrupter (GFCI) ................. 60
Fuel Pump Relay .............................................. 62-63
Engine Starter (Crank) Relay ........................... 64-65
Engine Glow Plug Relay ........................................ 66
Magnetic Pickup Unit ........................................ 67-68
Magnetic Pickup Unit/Fuel Feed Pump Strainer .... 69
Frequently Asked Questions ............................. 70-71
Frequently Asked Questions .................................. 71
Denitions ......................................................... 72-73
Alternator Resistance Chart .................................. 74
Exciter Field Current and Voltage Table ................ 75
Generator Weights and Lifting Points Table .......... 76
Torque Specications Table ................................... 77
ECU-845 AC Fault Codes ................................. 78-81
Ovrcurrent Relay Trip Point Table .......................... 82
Troubleshooting (Engine) ................................. 83-84
Troubleshooting Flowcharts ............................. 85-92