Proheat M125 - Manual (Page 2)

CONTENTS
A. SAFETY ...................................................................................... A-1
SAFETY CONSIDERATIONS ..............................................................A-2
B. INTRODUCTION ......................................................................... B-1
C. PROHEAT CONTROL MODULE (PCM) TYPE ............................ C-1
D. COMPRESSOR TYPE ................................................................ D-1
E. MODEL DESCRIPTIONS ............................................................ E-1
1.0 TECHNICAL SPECIFICATIONS .................................................. 1-1
1.1 PHYSICAL .............................................................................. 1-2
1.2 G-II PCM ELECTRICAL ............................................................. 1-8
1.3 TORQUE SPECIFICATIONS ....................................................... 1-9
2.0 PRINCIPLES OF OPERATION ................................................... 2-1
2.1 COMPONENT DESCRIPTION .................................................... 2-1
2.2 THEORY OF OPERATION .......................................................... 2-4
2.3 MODES OF OPERATION .......................................................... 2-6
2.3.1 Standard Mode............................................................2-6
2.3.2 Preheat Mode............................................................. 2-7
2.3.3 Supplemental Mode.................................................... 2-8
3.0 MAINTENANCE TOOLS ............................................................. 3-1
4.0 TROUBLESHOOTING AND REPAIR ........................................... 4-1
4.1 SYSTEM AND COMPONENT DIAGNOSTICS................................ 4-2
4.1.1 EXAMPLE PROHEAT BEHAVIOR ERROR – Code 1 ........... 4-4
4.1.2 START Diagnostic Code 1 ............................................ 4-5
4.1.3 FLAME OUT Diagnostic Code 2 .................................. 4-23
4.1.4 COOLANT FLOW Diagnostic Code3 ............................. 4-24
4.1.5 OVERHEAT Diagnostic Code 4.................................... 4-25
4.1.6 VOLTAGE Diagnostic Code 5 ...................................... 4-26
4.1.7 FLAME FAULT Diagnostic Code 6 ............................... 4-27
4.1.8 TEMP SENSOR/COOLANT FLOW
Diagnostic Code 7 .................................................... 4-27
4.1.9 FUEL SOLENOID VALVE Diagnostic Code 8 ................. 4-29
4.1.10 NOT USED Diagnostic Code 9 .................................... 4-29
4.1.11 IGNITION MODULE Diagnostic Code 10 ...................... 4-30
4.1.12 COOLANT PUMP Diagnostic Code 11.......................... 4-31
4.1.13 MOTOR Diagnostic Code 12 ...................................... 4-32
4.1.14 AUXILIARY OUTPUT Diagnostic Code 13 ..................... 4-34
4.1.15 ACCESSORY/SWITCH OUTPUT Diagnostic Code 14 ..... 4-34
4.1.16 INDICATOR OUTPUT Diagnostic Code 15 .................... 4-35
4.1.17 SYSTEM CURRENT Diagnostic Code 16 ...................... 4-35
4.1.18 MOTOR SPEED SENSOR Diagnostic Code 17 .............. 4-35
4.1.19 CANbus ERROR Diagnostic Code 18 .......................... 4-35
i PROHEAT M-SERIES G-II PCM SERVICE MANUAL