Rheem RTG74 Manuals

Manuals and User Guides for Rheem RTG74. We have 1 Rheem RTG74 manual available for free PDF download: Troubleshooting Manual

Rheem RTG74 Troubleshooting Manual

Rheem RTG74 Troubleshooting Manual (82 pages)

Tankless

Brand: Rheem | Category: Water Heater | Size: 3.57 MB

Table of Contents

Table of Contents
2
Specifications Common to All Product Lines

5
Product (Model) History

6
Sequence of Operations

8
Sensors and Safety

9
Maintenance Panel Display

11
Clearing the Fault History

12
Adjusting the Burner Control Assembly (Printed Circuit Board)

12
How to Check Manifold Gas Pressure

13
Program Chip Adjustment

14
Changing the Maximum Temperature Setting to 140

15
Changing the Maximum Temperature Setting to 120

15
Error Codes

16
Diagnostic Points on Printed Circuit Board

19
Thermistor Resistance Chart

20
Fan Speed Chart

21
Rtg2-42

22
- Wiring Diagram
  22
- Printed Circuit Board
  23
Rtg 53

24
- Wiring Diagram - RTG 53
  24
- Printed Circuit Board - RTG 53
  25
Rtg 66

26
- Wiring Diagram
  26
- Printed Circuit Board
  27
- Error Code 11 (RTG66 Only)
  28
- Error Code 51 (RTG 66 Only)
  31
- Error Code 61 (RTG 66 Only)
  32
- Error Code 65 (RTG66 Only)
  33
- Code 65 Water Volume Control Fault
  33
- Error Code 66 (RTG66 Only)
  34
Rtg 74

35
- Wiring Diagram - RTG 74
  35
- Printed Circuit Board - RTG 74
  36
MIC-180 & EZ Link

37
2Nd Generation Flame Rod Chart

40
Troubleshooting

41
- Troubleshooting Format and Example
  41
- Unit will Not Power on
  42
- Error Code 00
  45
- Warning Code 05
  45
- Warning Code 10
  46
- Error Code 11
  46
- Error Code 12
  50
- Error Code 13
  51
- Error Code 14
  52
- Code 14 Overheat Film Wrap Activated
  52
- Error Code 15
  53
- Error Code 16
  54
- Error Code 21 (Indoor Models Only)
  54
- Error Code 24
  55
- Error Code 29
  55
- Error Code 31
  55
- Error Code 31
  56
- Error Code 32
  56
- Error Code 33
  57
- Error Code 34
  57
- Error Code 35
  58
- Error Code 38
  58
- Error Code 51
  58
- Error Code 52
  59
- Error Code 61
  60
- Error Code 65
  60
- Code 65 Water Volume Control Fault
  60
- Error Code 66 (RTG66 Only)
  61
- Error Code 71
  61
- Error Code 72
  61
- Error Code 76
  62
- Error Code 79
  62
- Error Code 80/81
  62
- Error Code 82
  62
  - Code 76 Communication Fault with Remote
    62
  - Code 79 Fan Motor Current Fault
    62
- Error Code 90
  63
- Error Code 99
  64
- Warning Code IL
  64
- Warning Code P1
  65
Disassembly and Repair

65
- St Generation 7.4 Product Series
  
  65
- Printed Circuit Board (PCB)
  65
- Disassembly/Repair 1St Generation 7.4 Series
  65
- Air Filter Switch
  66
- Water Inlet Solenoid
  66
- Hot Water Outlet
  67
- Transformer
  67
- Fan Assembly
  68
- Proportional Gas Flow Regulator
  69
- Burner Plate Cover
  70
- Burner Assembly
  70
- Igniter and Igniter Probes
  71
- Flame Rod(S)
  71
- Heat Exchanger Thermistor
  71
Parts

72

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