Hayward H400FDN Universal H Series Troubleshooting Guide - Page 26

Test F1 3AMP fuse

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 26 highlights

1. Heater Not Powering Up (cont.) Test F1 (3AMP) fuse Step 1L Test ICB's display output Step 1M On the ICB, locate and test the 3A fuse for continuity. IF fuse is blown, replace it and go to section 3. IF Ok, go to step 1M. On the ICB, verify 22-28VAC between AC & COM terminals (pins 1 & 4). IF voltage is present, replace display/bezel/keypad. IF no voltage, replace ICB (pg. 20). 26

  • 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
Test F1 (3AMP) fuse
On the ICB, locate and test the 3A fuse for
continuity.
IF fuse is blown, replace it and go to
section 3
. IF Ok, go to step 1M.
On the ICB, verify 22
–
28VAC between AC & COM
terminals (pins 1 & 4). IF voltage is present, replace
display/bezel/keypad. IF no voltage, replace ICB
(
pg. 20
).
Test ICB’s display output
26
1. Heater Not Powering Up (cont.)
Step 1L
Step 1M