Hayward H400FDP Support and Manuals
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Popular Hayward H400FDP Manual Pages
Universal H Series Troubleshooting Guide - Page 3
...-33
5. "LO" Code
46-51
12. "IF" Code
52-55
13. "AC" Code
56-57
14. "SF" or "HS" Code 9. Open FC1&/FC2 Fuse
27-28
3. "EE" or "CE" Code
36-37
Troubleshooting (cont.): 7. "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 "BD" Code
34...
Universal H Series Troubleshooting Guide - Page 7
... actual water temp. Gas valve opens and
monitors flame sense. The gas valve is de-energized, and the flame is de-energized at flame sense or at completion of Operation: Normal
The control continually compares the set temp to light operations.
7 At proper ignitor temp, a 4 second trial begins. The blower will operate for heat. If the...
Universal H Series Troubleshooting Guide - Page 8
... fails: 1.
Waits 60 minutes then retries 3 more times. 5. UHS Sequence of Operation: Failure to retry every 60 minutes, until lockout (IF code). 4. NOTE: When making keypad entries of heating mode sequence. 3. Gas valve de-energizes (for 30 second, blower post purge). 2. Starts over at #2 of any type there may be a 5-10 sec delay for...
Universal H Series Troubleshooting Guide - Page 17
... low, go to
step 4. IF it does, continue to reduce pressure).
*NOTE: Before any adjustment occurs, verify inlet gas pressure meets the requirement
set forth by the data plate on the heater.
Once removed, increase pressure by rotating valve clockwise, (counter clockwise to step 4. IF NOT, refer to
installation manual and/or contact installer.
17 Remove plug.
Universal H Series Troubleshooting Guide - Page 27
...
wiring damaged, pinched, or worn? NO
Test transformer resistance
Is resistance
YES
correct?
Open FC1 &/or F2 Fuse
Open FC1 &/or F2 Fuse
Problem solved
Correct voltage YES
selector plug? NO
Correct/repair transformer
wiring
Contact Support (908) 355-7995
Replace transformer: IDXL2TRF1930
27 NO
Install correct plug and
replace fuse
YES
Did this correct the...
Universal H Series Troubleshooting Guide - Page 36
...
secure? NO
Replace ICB: FDXLICB1930
Problem solved
Did "CE" code YES
clear?
NO
Section B
Replace ICB: FDXLICB1930
YES Did the "CE"
code clear? NO
Check display ribbon cable connection
Secure connections
& retest
Problem solved
Contact Support (908) 355-7995
NO
Go to section B
The "CE" code may clear with a reset of power, power cycle
the heater
YES Did the...
Universal H Series Troubleshooting Guide - Page 40
... red to
YES
black, do the readings
differ by more than 1°? NO
Replace thermistor: FDXLTER1930
Plumb correctly in compliance with installation manual
Replace ICB: FDXLICB1930
Make sure water inlet & outlet are
YES
plumbed correctly,
are they reversed?
Service LED ON: "SF" OR "HS" Code
"SF" OR "HS" Code
Check display for High Sense (water temperature).
8. NO...
Universal H Series Troubleshooting Guide - Page 44
NO
Did the "HF" YES
code reappear?
NO
Test for heat
YES
Is 24VAC
present? 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...
Universal H Series Troubleshooting Guide - Page 45
... is sensed when the gas valve is defective and needs to be replaced. IF "HF" reappears, go into lockout.
IF power cycling clears to the
"HF" message and the heater fires, drop the temperature to toggle the heater and call for 5 seconds then restart heater after 2 minutes. Service LED ON: "HF" Code (cont.)
"HF" (heat or flame sensed) will...
Universal H Series Troubleshooting Guide - Page 46
Service LED ON: "LO" Code
"LO" Code
Verify adequate water flow, is continuity present? YES
Is water pressure switch wiring free of damage?
NO
NO 46
Replace exhaust gas limit switch: FDXLEGL1930
YES Are wires free
of
damage?
NO
Contact Support (908) 355-7995
Did error YES
clear? Heater made after Feb. 2016? 11. Verify high limit wires are free of...
Universal H Series Troubleshooting Guide - Page 51
... be replaced and the heat exchanger should be inspected for soot or damage. Service LED ON: "LO" Code (cont.)
Note: This switch is a one time safety. IF open, replace switch (pg. 20). 11. Indoor/Outdoor: Feb. 2016 and newer
Step 11I
Test continuity across the exhaust gas limit switch. IF switch does not exist AND problem still persists, contact support...
Universal H Series Troubleshooting Guide - Page 52
... manifold gas
pressure
Replace gas
valve:
Replace ICB:
52
Please refer to gas valve during
call for heat
pressure correct? 12.
NO
YES Is voltage
correct?
Service LED ON: "IF" Code
"IF" Code
Is main gas supply ON? NO
Turn on main gas supply &
retest
Go to section B (next page)
On ICB, verify flame
Inspect gas YES Is heater's gas YES sensor & gas valve
valve in heater
valve ON...
Universal H Series Troubleshooting Guide - Page 53
...
YES
damaged/
wrong?
12. NO
Contact tech support:
(908) 355-7995
53 NO
Inspect and/or clean burner tubes
& orifices
Replace with new burner kit: FDXLBRN1930 OR Gas Valve
(includes orifices): (pg. 20)
YES Are burner tubes &
orifices damaged? Service LED ON: "IF" Code
Section B (continued from previous page)
Is correct flame YES
sensor installed OR damaged?
Universal H Series Troubleshooting Guide - Page 58
Service LED ON: "AO" Code
"AO" Code
Replace blower vacuum switch: FDXLBVS1930
Is blower YES
damaged?
NO
Replace blower: Please refer to
(pg. 20)
Go to
(pg. 20)
Is vacuum tube YES
damaged? 14.
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 tubing: ...
UHS Heater - How To Guide - Page 7
Cut the wire tie inside the
heater as you lower the exchanger back into the heater cabinet.
Step 12
Lift and rotate the heat exchanger to the left side of the heater to not damage the insulation as shown. How To: Rotate UHS Heat Exchanger (cont.)
Step 9
Step 10
Remove the Thermistor connection from ignition board. Route the RED...
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