Table Of Contents - Rheem RTG2-42 Troubleshooting Manual

Specifications common to all product lines ................................................................................ 4
Product (Model) History .............................................................................................................. 5
Sequence of Operations ................................................................................................................ 7
Sensors and Safety ........................................................................................................................ 8
Oxygen Depletion Sensing System Operation............................................................................ 8
How to Reset the Four (4) Hour ODS Timer.............................................................................. 9
Overheat Film Wrap ................................................................................................................... 9
Heat Exchanger Thermistor ...................................................................................................... 10
Maintenance Panel Display........................................................................................................ 10
Clearing the Fault History ......................................................................................................... 11
Adjusting the Burner Control Assembly (Printed Circuit Board)......................................... 11
How to Check Manifold Gas Pressure ...................................................................................... 12
Program Chip Adjustment......................................................................................................... 13
Changing the Maximum Temperature Setting to 140° ........................................................... 14
Changing the Maximum Temperature Setting to 120° ........................................................... 14
Error Codes ................................................................................................................................. 15
Diagnostic Points on Printed Circuit Board............................................................................. 18
Thermistor Resistance Chart..................................................................................................... 19
Fan Speed Chart ......................................................................................................................... 20
RTG2-42....................................................................................................................................... 21
Wiring Diagram ........................................................................................................................ 21
Printed Circuit Board ................................................................................................................ 22
RTG 53......................................................................................................................................... 23
Wiring Diagram - RTG 53 ....................................................................................................... 23
Printed Circuit Board - RTG 53 ............................................................................................... 24
RTG 66......................................................................................................................................... 25
Wiring Diagram ........................................................................................................................ 25
Printed Circuit Board ................................................................................................................ 26
Error Code 11 (RTG66 Only) ................................................................................................... 26
Error Code 11 (RTG66 Only) ................................................................................................... 27
Error Code 51 (RTG 66 Only) .................................................................................................. 30
Error Code 61 (RTG 66 Only) .................................................................................................. 31
Error Code 65 (RTG66 Only) ................................................................................................... 32
Error Code 66 (RTG66 Only) ................................................................................................... 33
RTG 74......................................................................................................................................... 34
Wiring Diagram - RTG 74 ....................................................................................................... 34
Printed Circuit Board - RTG 74 ............................................................................................... 35
MIC-180 & EZ Link ................................................................................................................... 36
MIC-180 Printed Circuit Board ................................................................................................ 36
Error Code 03 (MIC-180 & EZLink Only)............................................................................... 37
Test Run Mode.......................................................................................................................... 37
MIC 180 Maintenance Mode Table.......................................................................................... 38
Maintenance Information Mode ............................................................................................... 38
2nd Generation Flame Rod Chart............................................................................................. 39
SVC 810 Tankless Troubleshooting Manual

Table of Contents

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