Universal H Series Troubleshooting Guide
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Universal H Series Heaters Troubleshooting Guide HxxxFD(N/P) TSG-UHS16b HxxxFD(N/P)ASME Copyright 2017 Hayward Industries Inc.
Universal H Series Heaters Troubleshooting Guide HxxxFD(N/P) TSG-UHS16b HxxxFD(N/P)ASME Copyright 2017 Hayward Industries Inc.
Universal H Series Troubleshooting Guide
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Open FC3&/F1 Fuse 29-31 4. "IF" Code 52-55 13. Table of Contents ICB and Fuse Board Layout 4-6 UHS Sequence of Operation: Normal/Failure to Light 7-8 UHS Gas and Electrical Connections 9-11 How To: Pg. 12-17 Program Heater Bypass & Temperature Lockout 13-15 Test/Adjust Gas Pressure 16-17 Troubleshooting: Pg. 18-64 Diagnostic Codes and Part Numbers 19-20 1. "BD" Code 34-35 6. "EE" or "CE" Code 36-37...
Open FC3&/F1 Fuse 29-31 4. "IF" Code 52-55 13. Table of Contents ICB and Fuse Board Layout 4-6 UHS Sequence of Operation: Normal/Failure to Light 7-8 UHS Gas and Electrical Connections 9-11 How To: Pg. 12-17 Program Heater Bypass & Temperature Lockout 13-15 Test/Adjust Gas Pressure 16-17 Troubleshooting: Pg. 18-64 Diagnostic Codes and Part Numbers 19-20 1. "BD" Code 34-35 6. "EE" or "CE" Code 36-37...
Universal H Series Troubleshooting Guide
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... sequence starts: 1. Gas valve opens and monitors flame sense. The blower will turn off for a 30 second post purge. The blower will operate for one second. When set temp is 1º below the set temp to the next page for heat. 5. UHS Sequence of 4 sec trial. When the water temp is reached, the control ends the call for more details outlining failure to light operations. 7 The control checks for...
... sequence starts: 1. Gas valve opens and monitors flame sense. The blower will turn off for a 30 second post purge. The blower will operate for one second. When set temp is 1º below the set temp to the next page for heat. 5. UHS Sequence of 4 sec trial. When the water temp is reached, the control ends the call for more details outlining failure to light operations. 7 The control checks for...
Universal H Series Troubleshooting Guide
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... does, continue to installation manual and/or contact installer. 17 IF NOT, refer to step 4. Remove plug. Once removed, increase pressure by rotating valve clockwise, (counter clockwise to reduce pressure). *NOTE: Before any adjustment occurs, verify inlet gas pressure meets the requirement set forth by the data plate on the heater. How To: Test/Adjust Gas Pressure (cont.) NOTE: IF incoming gas pressure is high or low, go to step...
... does, continue to installation manual and/or contact installer. 17 IF NOT, refer to step 4. Remove plug. Once removed, increase pressure by rotating valve clockwise, (counter clockwise to reduce pressure). *NOTE: Before any adjustment occurs, verify inlet gas pressure meets the requirement set forth by the data plate on the heater. How To: Test/Adjust Gas Pressure (cont.) NOTE: IF incoming gas pressure is high or low, go to step...
Universal H Series Troubleshooting Guide
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... covered on the following pages. Troubleshooting Steps for the UHS Heater. Ignition Failure Ignitor Circuit Open Water 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 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 secondary high voltage fault Communication Error Between Control Module and Display Interface Assembly Bad board Flame present with Gas Valve...
... covered on the following pages. Troubleshooting Steps for the UHS Heater. Ignition Failure Ignitor Circuit Open Water 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 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 secondary high voltage fault Communication Error Between Control Module and Display Interface Assembly Bad board Flame present with Gas Valve...
Universal H Series Troubleshooting Guide
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...Flame Sensor (3" & 5") FDXLFSK1930 FDXLFSK1930 Fuse Kit FDXLWPS1930 FDXLWPS1930 Water Pressure Switch FDXLBVS1930 FDXLBVS1930 Blower Vacuum Switch FDXLBRN1930 FDXLBRN1930 Burner Kit *FDXLGSV0001 FDXLGSV1500N Gas Valve (Natural Gas) FDXLGSV002 FDXLGSV1500P Gas Valve (Propane) FDXLVPS1930 FDXLVPS1930 Vent Pressure Switch Part Number: Part Number: (H150-H400) (H500) IDXL2TRF1930 IDXL2TRF1930 Description Transformer Part Number: Part Number: (H150-H400) (H500) Description FDXLBWR1930 FDXLBWR1500 Blower FDXLFWP1930 FDXLFWP1930 Fuse Board (field wiring panel) FDXLWHA1930 FDXLWHA1930 Wiring...
...Flame Sensor (3" & 5") FDXLFSK1930 FDXLFSK1930 Fuse Kit FDXLWPS1930 FDXLWPS1930 Water Pressure Switch FDXLBVS1930 FDXLBVS1930 Blower Vacuum Switch FDXLBRN1930 FDXLBRN1930 Burner Kit *FDXLGSV0001 FDXLGSV1500N Gas Valve (Natural Gas) FDXLGSV002 FDXLGSV1500P Gas Valve (Propane) FDXLVPS1930 FDXLVPS1930 Vent Pressure Switch Part Number: Part Number: (H150-H400) (H500) IDXL2TRF1930 IDXL2TRF1930 Description Transformer Part Number: Part Number: (H150-H400) (H500) Description FDXLBWR1930 FDXLBWR1500 Blower FDXLFWP1930 FDXLFWP1930 Fuse Board (field wiring panel) FDXLWHA1930 FDXLWHA1930 Wiring...
Universal H Series Troubleshooting Guide
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NO Test transformer resistance Is resistance YES correct? NO Correct/repair transformer wiring Contact Support (908) 355-7995 Replace transformer: IDXL2TRF1930 27 2. NO Install correct plug and replace fuse YES Did this correct the problem? 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?
NO Test transformer resistance Is resistance YES correct? NO Correct/repair transformer wiring Contact Support (908) 355-7995 Replace transformer: IDXL2TRF1930 27 2. NO Install correct plug and replace fuse YES Did this correct the problem? 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
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... step 3E. IF damaged, repair/replace (pg. 20). 3. IF OK, go to step 3D. 30 With power off , inspect the blower vacuum switch wiring for damage. Inspect gas valve wiring Step 3D With power off , inspect the gas valve wiring for damage. Open FC3 &/or F1 Fuse Inspect connections/high limits Step 3A Inspect water pressure switch Step 3B Power down and inspect all remote connections and high limit wiring for damage. IF OK...
... step 3E. IF damaged, repair/replace (pg. 20). 3. IF OK, go to step 3D. 30 With power off , inspect the blower vacuum switch wiring for damage. Inspect gas valve wiring Step 3D With power off , inspect the gas valve wiring for damage. Open FC3 &/or F1 Fuse Inspect connections/high limits Step 3A Inspect water pressure switch Step 3B Power down and inspect all remote connections and high limit wiring for damage. IF OK...
Universal H Series Troubleshooting Guide
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NO Replace ICB: FDXLICB1930 Problem solved Did "CE" code YES clear? NO Section B Replace ICB: FDXLICB1930 YES Did the "CE" code clear? 6. NO Check display ribbon cable connection Secure connections & retest Problem solved Contact Support (908) 355-7995 NO Replace display/bezel/ keypad: (See Pg. 20) 36 YES Are connections secure? 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? 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 YES clear? NO Section B Replace ICB: FDXLICB1930 YES Did the "CE" code clear? 6. NO Check display ribbon cable connection Secure connections & retest Problem solved Contact Support (908) 355-7995 NO Replace display/bezel/ keypad: (See Pg. 20) 36 YES Are connections secure? 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? Service LED ON: "EE" OR "CE" Code "EE" OR "CE" Code Check display for "EE" code Is "EE" code YES present?
Universal H Series Troubleshooting Guide
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NO Replace thermistor: FDXLTER1930 Plumb correctly in compliance with installation manual NO Replace ICB: FDXLICB1930 Replace thermistor: FDXLTER1930 40 Is "SF" code present? Service LED ON: "SF" OR "HS" Code "SF" OR "HS" Code Check display for High Sense (water temperature). Replace ICB: FDXLICB1930 Make sure water inlet & outlet are YES plumbed correctly, are they reversed? 8. NO The "HS" code stands for "SF" code YES Ohm thermistor, checking each red to black, do...
NO Replace thermistor: FDXLTER1930 Plumb correctly in compliance with installation manual NO Replace ICB: FDXLICB1930 Replace thermistor: FDXLTER1930 40 Is "SF" code present? Service LED ON: "SF" OR "HS" Code "SF" OR "HS" Code Check display for High Sense (water temperature). Replace ICB: FDXLICB1930 Make sure water inlet & outlet are YES plumbed correctly, are they reversed? 8. NO The "HS" code stands for "SF" code YES Ohm thermistor, checking each red to black, do...
Universal H Series Troubleshooting Guide
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... water pressure switch wiring free of damage? NO Contact Support (908) 355-7995 Did error YES clear? YES NO NO NO Increase flow rate/clean filter Replace wire harness: FDXLWHA1930 Replace water pressure switch: FDXLWPS1930 Go to section B (next page) YES Is this heater installed indoors? NO Replace high limits kit: FDXLHLI1930 Problem solved Service LED ON: "LO" Code "LO" Code Verify adequate water flow, is continuity present? YES Check continuity of damage Adjust switch if necessary NO YES Does exhaust YES gas...
... water pressure switch wiring free of damage? NO Contact Support (908) 355-7995 Did error YES clear? YES NO NO NO Increase flow rate/clean filter Replace wire harness: FDXLWHA1930 Replace water pressure switch: FDXLWPS1930 Go to section B (next page) YES Is this heater installed indoors? NO Replace high limits kit: FDXLHLI1930 Problem solved Service LED ON: "LO" Code "LO" Code Verify adequate water flow, is continuity present? YES Check continuity of damage Adjust switch if necessary NO YES Does exhaust YES gas...
Universal H Series Troubleshooting Guide
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Service LED ON: "LO" Code Section B (continued from previous page) YES Heater made after Feb. 2016? NO Inspect flue and vent sizing Repair or replace tube kit: IDXL2SNT1930 YES Continuity present? NO Replace vent pressure switch: FDXLVPS1930 Replace exhaust gas limit switch: FDXLEGL1931 YES Is flue dirty? NO Clean flue and retest Refer to installation/ indoor vent instructions NO 47 Inspect vent pressure switch tube & connections Test vent pressure switch continuity Is tube YES damaged? NO...
Service LED ON: "LO" Code Section B (continued from previous page) YES Heater made after Feb. 2016? NO Inspect flue and vent sizing Repair or replace tube kit: IDXL2SNT1930 YES Continuity present? NO Replace vent pressure switch: FDXLVPS1930 Replace exhaust gas limit switch: FDXLEGL1931 YES Is flue dirty? NO Clean flue and retest Refer to installation/ indoor vent instructions NO 47 Inspect vent pressure switch tube & connections Test vent pressure switch continuity Is tube YES damaged? NO...
Universal H Series Troubleshooting Guide
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... vent pressure switch tube connections. IF heater is installed in an indoor application, proceed to 11E. IF OK, go to 11G. IF NOT, repair/replace tubing (pg. 20). Verify continuity across the temperature limit switches. Vent pressure switch/tubing Step 11F IF this heater is damaged, replace (pg. 20). 11. IF OK, go to 11D. Indoor application? Service LED ON: "LO" Code (cont.) Pressure switch adjustment Step 11C Inspect and test high...
... vent pressure switch tube connections. IF heater is installed in an indoor application, proceed to 11E. IF OK, go to 11G. IF NOT, repair/replace tubing (pg. 20). Verify continuity across the temperature limit switches. Vent pressure switch/tubing Step 11F IF this heater is damaged, replace (pg. 20). 11. IF OK, go to 11D. Indoor application? Service LED ON: "LO" Code (cont.) Pressure switch adjustment Step 11C Inspect and test high...
Universal H Series Troubleshooting Guide
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..., go to properly size venting may result in the heater's Installation Manual/Indoor Vent Instructions. 11. IF open, replace the vent pressure switch (pg. 20). Failure to step 11H. Inspect flue and vent sizing Step 11G Vent pressure switch continuity Step 11H Ensure that the vent size is not blocked or restricted. Service LED ON: "LO" Code (cont.) Note: Please ensure that flue is sufficient for the heater model installed.
..., go to properly size venting may result in the heater's Installation Manual/Indoor Vent Instructions. 11. IF open, replace the vent pressure switch (pg. 20). Failure to step 11H. Inspect flue and vent sizing Step 11G Vent pressure switch continuity Step 11H Ensure that the vent size is not blocked or restricted. Service LED ON: "LO" Code (cont.) Note: Please ensure that flue is sufficient for the heater model installed.
Universal H Series Troubleshooting Guide
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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 (includes orifices): (pg. 20) YES Are burner tubes & orifices damaged? 12. NO Contact tech support: (908) 355-7995 53
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 (includes orifices): (pg. 20) YES Are burner tubes & orifices damaged? 12. NO Contact tech support: (908) 355-7995 53
Universal H Series Troubleshooting Guide
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... ICB. Flame sensor & gas valve Step 12C Verify that the gas valve, inside the heater, is in the "ON" position. Verify gas pressure Step 12D Ensure both flame sensor and gas valve are correct (See Page 16 & 17). IF OK, go to Step 12F. 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...
... ICB. Flame sensor & gas valve Step 12C Verify that the gas valve, inside the heater, is in the "ON" position. Verify gas pressure Step 12D Ensure both flame sensor and gas valve are correct (See Page 16 & 17). IF OK, go to Step 12F. 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...
Universal H Series Troubleshooting Guide
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... plate. IF damaged, replace (pg. 20). Verify blower air inlet plate Step 12G Verify that the installed flame sensor is damaged, replace it with the 5" version (pg. 20). Service LED ON: "IF" 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 3" is installed OR IF sensor is 5". IF wrong or damaged contact tech support...
... plate. IF damaged, replace (pg. 20). Verify blower air inlet plate Step 12G Verify that the installed flame sensor is damaged, replace it with the 5" version (pg. 20). Service LED ON: "IF" 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 3" is installed OR IF sensor is 5". IF wrong or damaged contact tech support...
Universal H Series Troubleshooting Guide
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Service LED ON: "AO" Code "AO" Code Replace blower vacuum switch: FDXLBVS1930 Is blower YES damaged? NO YES Are blower vacuum switch wires damaged? NO Install correct plug and replace fuse Replace blower vacuum switch: FDXLBVS1930 Replace ICB: FDXLICB1930 58 Replace vacuum tubing: IDXL2SNT1930 Ohm out blower for 4-5ohms (after Sept. 2010), is voltage present? NO Correct voltage YES selector plug? 14. NO Replace blower: Please refer to right), is resistance correct? NO section B YES...
Service LED ON: "AO" Code "AO" Code Replace blower vacuum switch: FDXLBVS1930 Is blower YES damaged? NO YES Are blower vacuum switch wires damaged? NO Install correct plug and replace fuse Replace blower vacuum switch: FDXLBVS1930 Replace ICB: FDXLICB1930 58 Replace vacuum tubing: IDXL2SNT1930 Ohm out blower for 4-5ohms (after Sept. 2010), is voltage present? NO Correct voltage YES selector plug? 14. NO Replace blower: Please refer to right), is resistance correct? NO section B YES...
Universal H Series Troubleshooting Guide
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... could cause issues such as the heater dry firing or water to boil causing high limits to trip and possible damage to heat exchanger. • Flow exceeding maximum flow could cause issues such as it could be checked to the heat exchanger by -pass should be the cause of low or high water flow through the exchanger Model Min GPM H150FD H200FD 20...
... could cause issues such as the heater dry firing or water to boil causing high limits to trip and possible damage to heat exchanger. • Flow exceeding maximum flow could cause issues such as it could be checked to the heat exchanger by -pass should be the cause of low or high water flow through the exchanger Model Min GPM H150FD H200FD 20...