Hayward H400FDN Universal H Series Troubleshooting Guide - Page 50

Inhabitants At Serious Risk.

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 50 highlights

11. Service LED ON: "LO" Code (cont.) Note: Please ensure that the vent size is sufficient for the heater model installed. Failure to properly size venting may result in damage to heater OR COULD PUT INHABITANTS AT SERIOUS RISK. Inspect flue and vent sizing Step 11G Vent pressure switch continuity Step 11H Ensure that flue is not blocked or restricted. See indoor vent sizing requirements in the heater's Installation Manual/Indoor Vent Instructions. IF OK, go to step 11H. IF NOT, contact installer. Disconnect wires from vent pressure switch and measure continuity between VPS terminals. IF open, replace the vent pressure switch (pg. 20). IF OK, go to 11I. 50

  • 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
Ensure that flue is not blocked or restricted. See
indoor vent sizing requirements in the heater’s
Installation Manual/Indoor Vent Instructions. IF
OK, go to step 11H. IF NOT, contact installer.
Vent pressure switch continuity
Inspect flue and vent sizing
Step 11G
50
Step 11H
Note: Please ensure that the vent size is sufficient for the heater model installed.
Failure to properly size venting may result in damage to heater
OR COULD PUT
INHABITANTS AT SERIOUS RISK.
Disconnect wires from vent pressure switch and
measure continuity between VPS terminals. IF
open, replace the vent pressure switch (
pg. 20
). IF
OK, go to 11I.
11. Service LED ON: “LO” Code (cont.)