Hayward H400FDN Universal H Series Troubleshooting Guide - Page 38

Service LED ON: IO OR SB Code

Get Hayward H400FDN PDF manuals and user guides View all Hayward H400FDN manuals
Add to My Manuals
Save this manual to your list of manuals

Page 38 highlights

7. Service LED ON: "IO" OR "SB" Code "IO" OR "SB" Code 38 Check display for "IO" code Is "IO" code present? NO YES Verify ignitor wiring is not damaged and plugged in securely The "SB" code may clear with a reset of power, power cycle the heater Replace display/bezel/ keypad: (See Pg. 20) Is ignitor wire YES damaged? NO Replace ignitor: FDXLIGN1930 Replace ICB: FDXLICB1930 Ohm ignitor, verify 8-25 ohms (20°- YES 140°F), reading out of range? NO

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
“IO” OR
“SB” Code
Check display for
“
IO
” code
Is “IO” code
present?
The “
SB
” code may
clear with a reset of
power, power cycle
the heater
YES
NO
Verify ignitor wiring is
not damaged and
plugged in securely
7. Service LED ON: “IO” OR “SB” Code
38
Is ignitor wire
damaged?
Replace ignitor:
FDXLIGN1930
YES
NO
Ohm ignitor, verify
8-25 ohms (20°-
140°F), reading out
of range?
YES
NO
Replace ICB:
FDXLICB1930
Replace
display/bezel/
keypad:
(See Pg. 20)