Hayward H400FDN Universal H Series Troubleshooting Guide - Page 3

Table of Contents - heater

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Table of Contents ICB and Fuse Board Layout 4-6 UHS Sequence of Operation: Normal/Failure to Light 7-8 UHS Gas and Electrical Connections 9-11 How To: Pg. 12-17 Program Heater Bypass & Temperature Lockout 13-15 Test/Adjust Gas Pressure 16-17 Troubleshooting: Pg. 18-64 Diagnostic Codes and Part Numbers 19-20 1. Heater not powering up 21-26 2. Open FC1&/FC2 Fuse 27-28 3. Open FC3&/F1 Fuse 29-31 4. Open FC4 Fuse 32-33 5. "BD" Code 34-35 6. "EE" or "CE" Code 36-37 Troubleshooting (cont.): 7. "IO" or "SB" Code 8. "SF" or "HS" Code 9. "PF" Code Pg. 18-64 38-39 40-41 42-43 10. "HF" Code 44-45 11. "LO" Code 46-51 12. "IF" Code 52-55 13. "AC" Code 56-57 14. "AO" Code 58-60 Heat Exchanger: Flow requirements 61 Heat Exchanger: Inspection 62 Heat Exchanger: Potential Failure Causes 63 UHS Wiring Schematic 64 UHS Wiring Diagram 65 3

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Table of Contents
ICB and Fuse Board Layout
4-6
UHS Sequence of Operation:
Normal/Failure to Light
7-8
UHS Gas and Electrical Connections
9-11
How To:
Pg.
12-17
Program Heater Bypass &
Temperature Lockout
13-15
Test/Adjust Gas Pressure
16-17
Troubleshooting:
Pg.
18-64
Diagnostic Codes and Part Numbers
19-20
1. Heater not powering up
21-26
2. Open FC1&/FC2 Fuse
27-28
3. Open FC3&/F1 Fuse
29-31
4. Open FC4 Fuse
32-33
5. “BD” Code
34-35
6.
“EE” or “CE” Code
36-37
Troubleshooting (cont.):
Pg.
18-64
7. “IO” or “SB” Code
38-39
8.
“SF” or “HS” Code
40-41
9.
“PF” Code
42-43
10. “HF” Code
44-45
11. “LO” Code
46-51
12.
“IF” Code
52-55
13.
“AC” Code
56-57
14. “AO” Code
58-60
Heat Exchanger: Flow requirements
61
Heat Exchanger: Inspection
62
Heat Exchanger: Potential Failure Causes
63
UHS Wiring Schematic
64
UHS Wiring Diagram
65