Hayward H400FDN Support and Manuals
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Hayward H400FDN Videos
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Popular Hayward H400FDN Manual Pages
Universal H Series Troubleshooting Guide - Page 7
... sensor & flame sensor are constantly monitored during step four, the heater fails to fire, please procced to the actual water temp. The gas valve is de-energized, and the flame is reached, the control ends the call for a 30 second post purge.
Gas valve opens and
monitors flame sense. The control checks for one second. The blower will operate for heat...
Universal H Series Troubleshooting Guide - Page 17
...adjustment occurs, verify inlet gas pressure meets the requirement
set forth by rotating valve clockwise, (counter clockwise to
installation manual and/or contact installer.
17
IF it does, continue to
step 4. Remove plug. Verify heater specifications off the heater
plate (bottom front inside heater)
Step 3
Step 4
*Adjust the manifold pressure (at the gas valve)
IF inlet pressures...
Universal H Series Troubleshooting Guide - Page 19
... open Bad board or secondary high voltage fault Communication Error Between Control Module and Display Interface Assembly Bad board Flame present with Gas Valve not energized. Diagnostic Codes
Below is a list of all Diagnostic Codes for each Code are covered on the following pages. Troubleshooting Steps for the UHS Heater. Maximum return water temperature exceeded and / or rapid water...
Universal H Series Troubleshooting Guide - Page 20
... outlines the various replacement parts required for this troubleshooting guide.
* Heaters made prior to 07/16 that want the new display/bezel/keypad, will need to replace the old display with the Kit-Bezel Control Panel specific to their model heater.
Part Number: Part Number:
(H150-H400)
(H500)
IDXL2TRF1930 IDXL2TRF1930
Description
Transformer
Part Number: Part Number:
(H150-H400...
Universal H Series Troubleshooting Guide - Page 27
...
Is resistance
YES
correct? NO
Install correct plug and
replace fuse
YES
Did this correct the
problem?
NO
Correct/repair transformer
wiring
Contact Support (908) 355-7995
Replace transformer: IDXL2TRF1930
27
NO
Is transformer YES
wiring damaged, pinched, or worn?
Open FC1 &/or F2 Fuse
Open FC1 &/or F2 Fuse
Problem solved
Correct voltage YES
selector plug...
Universal H Series Troubleshooting Guide - Page 36
..." code may clear with a reset of power, power cycle
the heater
YES Did the "CE"
code clear? 6.
NO
Check display ribbon cable connection
Secure connections
& retest
Problem solved
Contact Support (908) 355-7995 Service LED ON: "EE" OR "CE" Code
"EE" OR "CE" Code
Check display for "EE" code
Is "EE" code YES
present? NO
Replace ICB: FDXLICB1930
Problem solved
Did "CE" code...
Universal H Series Troubleshooting Guide - Page 40
..." Code
"SF" OR "HS" Code
Check display for High Sense (water temperature).
NO
YES
Ohm thermistor, checking each red to
YES
black, do the readings
differ by more than 1°? Replace ICB: FDXLICB1930
Make sure water inlet & outlet are
YES
plumbed correctly,
are they reversed? NO
Replace thermistor: FDXLTER1930
Plumb correctly in compliance with installation manual...
Universal H Series Troubleshooting Guide - Page 44
NO
Did the "HF" YES
code reappear?
NO
Verify error code & jump to section that best describes error
Replace gas valve: Please refer to (pg. 20)
44
Reduce the temperature set point until heater
stop firing
Problem solved
Did the "HF" YES
code reappear?
Service LED ON: "HF" Code
"HF" Code
Power cycle the heater at the breaker
Does heater YES
fire? NO
10. NO
Toggle the...
Universal H Series Troubleshooting Guide - Page 45
... is still present at gas valve AND manifold pressure is not present, gas valve is off, the control will continuously run blower for heat. IF power cycling clears to the
"HF" message and the heater fires, drop the temperature to be replaced.
IF "HF" reappears, go into lockout. Service LED ON: "HF" Code (cont.)
"HF" (heat or flame sensed) will run...
Universal H Series Troubleshooting Guide - Page 51
... to be replaced and the heat exchanger should be inspected for soot or damage. IF open, replace switch (pg. 20). IF switch does not exist AND problem still persists, contact support: (908) 355-7995
51 Indoor/Outdoor: Feb. 2016 and newer
Step 11I
Test continuity across the exhaust gas limit switch. 11. Service LED ON: "LO" Code (cont.)
Note...
Universal H Series Troubleshooting Guide - Page 52
...ICB, verify flame
Inspect gas YES Is heater's gas YES sensor & gas valve
valve in heater
valve ON? connections are
YES
NO
Turn ON gas
secure
YES
Are connections
valve and retest
YES
Is inlet and manifold gas
secure?
NO
Turn on main gas supply &
retest
Go to gas valve during
call for heat
pressure correct? NO
YES Is voltage
correct? Service LED ON: "IF" Code
"IF" Code
Is main...
Universal H Series Troubleshooting Guide - Page 53
... tech support:
(908) 355-7995
53 12. Service LED ON: "IF" Code
Section B (continued from previous page)
Is correct flame YES
sensor installed OR damaged? NO
Replace flame sensor:
IDXLFLS1930
Check for damaged OR wrong blower
air inlet plate
NO
Is plate
YES
damaged/
wrong?
NO
Inspect and/or clean burner tubes
& orifices
Replace with new burner kit: FDXLBRN1930 OR Gas Valve...
Universal H Series Troubleshooting Guide - Page 54
.... IF correct, proceed to step 12C. IF NOT,
open gas supply. Flame sensor & gas valve
Step 12C
Verify that the gas valve, inside the heater, is in the "ON" position.
Service LED ON: "IF" Code
Inspect main gas supply
Step 12A
Verify gas valve is ON
Step 12B
IF "Ignition Failure", Ensure main gas supply is in the ON position. IF
NOT, go to...
Universal H Series Troubleshooting Guide - Page 55
... Code (cont.)
Voltage/pressure off gas valve
Step 12E
Verify correct flame sensor
Step 12F
Verify 22-28VAC off gas valve during ignition trial. IF present & no pressure (manometer attached), replace valve. IF correct, go to step 12G. IF NOT damaged, contact tech support (908) 355-7995. Otherwise, replace ICB (pg. 20).
IF damaged, replace (pg. 20). 12. IF 3" is installed OR IF sensor...
Universal H Series Troubleshooting Guide - Page 58
...NO
Replace blower: Please refer to section B
NO
Install correct plug and
replace fuse
Replace blower vacuum switch: FDXLBVS1930
Replace ICB: FDXLICB1930
58
Replace vacuum ...Replace blower: Please refer to
(pg. 20)
Go to
(pg. 20)
Is vacuum tube YES
damaged? NO
Correct voltage YES
selector plug? NO YES Are blower
vacuum switch wires damaged?
Service LED ON: "AO" Code
"AO" Code
Replace...
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