Proheat X45–School Bus - Manual (Page 3)

5.0 TROUBLESHOOTING & REPAIR ............................................... 5-1
5.0.1 Troubleshooting a Problem ........................................ 5-1
5.0.2 Example Proheat Behavior Error – Code 01................. 5-2
5-1 OPERATION INDICATORS, FUNCTION & COMPONENT
DIAGNOSTICS ................................................................... 5-3
5.1.1 Operation Indicators ................................................. 5-4
5.1.2 Function Diagnostics ................................................ 5-5
01 Start................................................................... 5-5
02 Flame Out ......................................................... 5-15
03 Coolant Flow ..................................................... 5-16
04 Overheat ........................................................... 5-17
05 Voltage ............................................................. 5-18
5.1.3 Component Diagnostics ................................................ 5-19
06 Flame Sensor .................................................... 5-19
07 Temp Sensor .................................................... 5-21
08 Fuel Pump......................................................... 5-23
09 Compressor ...................................................... 5-23
10 Ignition Coil....................................................... 5-25
11 Coolant Pump ................................................... 5-27
12 Blower .............................................................. 5-30
13 Sleeper Fan ...................................................... 5-32
14 Hour Meter (Auxiliary Output) .............................. 5-33
5-2 COMPONENT MECHANICAL OR ELECTRICAL PROBLEMS ........... 5-34
5.2.1 Fuel Nozzle .................................................................. 5-34
5.2.2 Fuel Regulator.............................................................. 5-34
5.2.3 Air Compressor ............................................................ 5-34
5.2.4 Fuel Pump ................................................................... 5-34
5.2.5 Ignition Electrode ......................................................... 5-34
5.2.6 Coolant Pump .............................................................. 5-34
5.2.7 Blower......................................................................... 5-34
5.2.8 Fuse ........................................................................... 5-35
5-3 OPERATIONAL PROBLEMS ...................................................... 5-37
5.3.1 Smoking exhaust ......................................................... 5-37
5.3.2 Low heat output ........................................................... 5-37
5.3.3 Engine temperature gauge reads low ............................. 5-37
5.3.4 Backfiring .................................................................... 5-37
6.0 MAINTENANCE .......................................................................... 6-1
6-1 WEEKLY MAINTENANCE ........................................................... 6-1
6-2 ANNUAL MAINTENANCE ........................................................... 6-1
6.2.1 Clean Heater Enclosure and Air Intake ............................. 6-2
6.2.2 Check Exhaust System ................................................... 6-3
6.2.3 Check Heat Exchanger .................................................... 6-3
6.2.4 Clean Flame Sensor ....................................................... 6-4
6.2.5 Check Cooling System .................................................... 6-4
6.2.6 Check Batteries ............................................................. 6-4
6.2.7 Check Fuel System......................................................... 6-5
6.2.8 Check Fuel Filter ............................................................ 6-5
6.2.9 Clean Nozzle .................................................................. 6-6
6.2.10 Replace Compressor Air Filter ....................................... 6-6
6.2.11 Check Electrical System ............................................... 6-7
6.2.12 Check Air Pressure ....................................................... 6-8
6.2.13 Check Modes of Operation – Switch, Timer or OEM Signals .. 6-8
7.0 APPENDICES ............................................................................ 7-1
Bulletins 951528, 967329, SB0003, PB0034, SB0062
8.0 WARRANTY ............................................................................... 8-1
ii PROHEAT INSTALLATION & SERVICE