H250FDN If Code - Hayward

H250FDN If Code

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Universal H Series Troubleshooting Guide


Page 3
Open FC4 Fuse 32-33 5. "LO" Code 46-51 12. "IF" Code 52-55 13. "PF" Code Pg. 18-64 38-39 40-41 42-43 10. "HF" Code 44-45 11. "AC" Code 56-57 14. "SF" or "HS" Code 9. "BD" Code 34-35 6. "AO" Code 58-60 Heat Exchanger: Flow requirements 61 Heat Exchanger:...63 UHS Wiring Schematic 64 UHS Wiring Diagram 65 3 Open FC3&/F1 Fuse 29-31 4. Heater not powering up 21-26 2. "EE" or "CE" Code 36-37 Troubleshooting (cont.): 7. Table of Contents ICB and Fuse Board Layout 4-6 UHS Sequence of Operation: Normal/Failure to Light 7-8 UHS Gas and Electrical...
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Universal H Series Troubleshooting Guide


Page 8
UHS Sequence of any type there may be a 5-10 sec delay for certain situations. 8 Retries 3 times until demand for 30 second, blower post purge). 2. NOTE: When making keypad entries of Operation: Failure to retry every 60 minutes, until lockout (IF code). 4. Gas valve de-energizes (for heat is stopped. Will continue to Light If trial fails: 1. Starts over at #2 of heating mode sequence. 3. Waits 60 minutes then retries 3 more times. 5.
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Universal H Series Troubleshooting Guide


Page 19
Diagnostic Code AC AO BD CE EE HF HS IF IO LO PF SB SF Description Blower Vacuum Switch closed Blower Vacuum Switch open Bad board or ... Pressure Switch, Vent Pressure Switch, or Temperature Limit Switch Fault Voltage polarity reversed, low voltage detected Keypad failure Temperature Sensor (thermistor) input failure 19 Diagnostic Codes Below is a list of all Diagnostic Codes for each Code are covered on the following pages.
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Universal H Series Troubleshooting Guide


Page 34
NO Disconnect P6 and test for 110125VAC between 1-3 (white & black) Replace transformer: IDXL2TRF1930 34 YES Is voltage correct? NO NO On P4, verify 110125VAC between pins 3-5. 5. NO Replace wire harness: FDXLWHA1930 YES Is fuse blown? Proceed to: Section 4 YES Is voltage correct? Service LED ON: 'BD' Code 'BD' Code Power down and check the FC4 fuse Verify E10 for 110 - 125VAC between 4-6 (grey wires) Replace fuse board: FDXLFWP1930 Replace transformer: IDXL2TRF1930 YES Is voltage correct?
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Universal H Series Troubleshooting Guide


Page 35
... to step 5D. Verify ICB input Step 5C Disconnect the P6 connector and test voltage for 110-125VAC between 4-6 (grey wires). Service LED ON: 'BD' Code Test the FC4 fuse (continuity) Step 5A Verify ICB output Step 5B With power off, verify the FC4 fuse has continuity. Verify 110125VAC between 1-3 (white...
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Universal H Series Troubleshooting Guide


Page 36
NO Replace display/bezel/ keypad: (See Pg. 20) 36 YES Are connections secure? Service LED ON: "EE" OR "CE" Code "EE" OR "CE" Code Check display for "EE" code Is "EE" code YES present? NO Go to section B The "CE" code may clear with a reset of power, power cycle the heater YES Did the "CE" code 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 Replace ICB: FDXLICB1930 Problem solved Did "CE" code YES clear? 6.
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Universal H Series Troubleshooting Guide


Page 37
.... (pg. 20) then go to solve problem, contact support (908) 355-7995. IF no EE error, go to 6C. 6. Service LED ON: "EE" OR "CE" Code Check display for "EE" Step 6A Check display for "CE" Step 6B "EE" error indicates the you have a defective ICB board.
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Universal H Series Troubleshooting Guide


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


Page 39
..., go to step 7B. Replace display/bezel/key pad (pg. 20). IF this error appears, go to the ICB. Service LED ON: "IO" OR "SB" Code Check display for "IO" Step 7A Inspect ignitor wires Step 7B "IO" error stand for "SB" Step 7D With power off, verify ignitor ohm resistance...
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Universal H Series Troubleshooting Guide


Page 40
...;? NO Replace thermistor: FDXLTER1930 Plumb correctly in compliance with installation manual 8. NO Replace ICB: FDXLICB1930 Replace thermistor: FDXLTER1930 40 Is "SF" code present? NO The "HS" code stands for "SF" code YES Ohm thermistor, checking each red to black, do the readings differ by more than 1°? Service LED ON: "SF" OR "HS...
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Universal H Series Troubleshooting Guide


Page 41
... two readings differ more than 1°, replace thermistor. IF the thermistor checks-out, replace the ICB (pg. 20). 41 Service LED ON: "SF" OR "HS" Code The "HS" (High Sense (water temperature)) will often cause frequent occurrences of more than 6° with-in 8A. Step 8B The "SF" (Sensor Failure) indicates... that the thermistor (or temp sensor) is reading above 105° OR if the sensor detects an increase of the "HS" error code. IF NOT, replace ICB (pg. 20). 8. Verify the water inlet & outlet are inlet/outlet reversed?
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Universal H Series Troubleshooting Guide


Page 42
"PF" Code 9. NO Inspect ground and neutral connections, are they clean and secured? Is the incoming YES power within 10% + or - Service LED ON: "PF" Code Verify incoming power is within 10% of required voltage. of required voltage? NO YES Replace ICB: FDXLICB1930 Correct source power issue Clear dirt/debris and secure ground and neutral wires and retest 42
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Universal H Series Troubleshooting Guide


Page 43
... if low voltage is detected, if the ground path is not sufficient, or the ICB is related to step 9B. Service LED ON: "PF" Code "Polarity Failure" This code will clear. IF NOT, then the problem is defective. 9. Verify both neutral and ground connections (both internal and external) are clean and secured...
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Universal H Series Troubleshooting Guide


Page 44
Service LED ON: "HF" Code "HF" Code Power cycle the heater at the breaker Does heater YES fire? NO Toggle the mode button and call for 24VAC off the gas valve Replace ICB: FDXLICB1930 Do you have YES manifold gas pressure? NO 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? NO Did the "HF" YES code reappear? 10. NO Test for heat YES Is 24VAC present?
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Universal H Series Troubleshooting Guide


Page 45
... cycling clears to the "HF" message and the heater fires, drop the temperature to be replaced. The blower will go to clear an erroneous "HF" code. Press the mode button to toggle the heater and call for heat and test gas valve Step 10B ON Power cycle the heater, in an... attempt to step 10B. Power cycle heater Step 10A OFF Call for heat. IF "HF" reappears, go into lockout. Service LED ON: "HF" Code (cont.) "HF" (heat or flame sensed) will occur if flame is sensed when the gas valve is defective and needs to suspend heating. When corrected...
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Universal H Series Troubleshooting Guide


Page 46
... high limit wires are free of damage? NO Replace high limits kit: FDXLHLI1930 Problem solved YES Check continuity of damage? Service LED ON: "LO" Code "LO" Code Verify adequate water flow, is continuity present? Heater made after Feb. 2016? NO NO 46 Replace exhaust gas limit switch: FDXLEGL1930 YES Are wires free...
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Universal H Series Troubleshooting Guide


Page 47
... NO Replace vent pressure switch: FDXLVPS1930 Replace exhaust gas limit switch: FDXLEGL1931 YES Is flue dirty? NO YES Vent sized correctly? Service LED ON: "LO" Code Section B (continued from previous page) YES Heater made after Feb. 2016? 11.
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Universal H Series Troubleshooting Guide


Page 48
... 11B Inspect the water pressure switch wiring, ensuring wire harness terminals are securely fastened. IF OK, go to Step 11C. 48 Service LED ON: "LO" Code "LO" Code (Limit Open) may relate to water flow. "LO" is NORMAL when the pump is running ). Remove wires from water pressure switch & measure continuity across...
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Universal H Series Troubleshooting Guide


Page 49
Service LED ON: "LO" Code (cont.) Pressure switch adjustment Step 11C Inspect and test high limits Step 11D Some sites may require a pressure switch adjustment. Verify continuity across the temperature ...
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Universal H Series Troubleshooting Guide


Page 50
... indoor vent sizing requirements in damage to step 11H. IF OK, go to heater OR COULD PUT INHABITANTS AT SERIOUS RISK. Service LED ON: "LO" Code (cont.) Note: Please ensure that flue is sufficient for the heater model installed. IF OK, go to properly size venting may result in the heater...

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We have the following 5 documents available for the Hayward H250FDN:
  • Universal H Series Troubleshooting Guide
  • UHS Heater - How To Guide
  • LITUHSBRO23_Universal_H_Series_Brochure_DIGITAL_4ce2
  • uhs_qrg_20f0
  • Energy Guide Label
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