Universal H Series Troubleshooting Guide
Page 4
Integrated Control Board Layout (ICB) C B A J 4 D I E A Remote Control: 24VAC (E1) F B Flame Sensor (E4) C Temperature Sensor (E2) G D Display Output: 24VAC (E7) E 3A Fuse (F1) F Low Voltage R & C: 24VAC (E12, E13) G Gas Valve & Safety Switches: 24VAC (E11) H H High Voltage: 120VAC (E10) I Blower/Inducer (E6) J Ignitor (E3)
Integrated Control Board Layout (ICB) C B A J 4 D I E A Remote Control: 24VAC (E1) F B Flame Sensor (E4) C Temperature Sensor (E2) G D Display Output: 24VAC (E7) E 3A Fuse (F1) F Low Voltage R & C: 24VAC (E12, E13) G Gas Valve & Safety Switches: 24VAC (E11) H H High Voltage: 120VAC (E10) I Blower/Inducer (E6) J Ignitor (E3)
Universal H Series Troubleshooting Guide
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...3. At proper ignitor temp, a 4 second trial begins. When set point the following sequence starts: 1. 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 the next page for open blower vacuum switch.... When the water temp is 1º below the set temp is sensed, The blower vacuum switch, control loop, temp sensor & flame sensor are constantly monitored during step four, the heater fails to fire, please procced to the actual water temp. The control checks for more ...
...3. At proper ignitor temp, a 4 second trial begins. When set point the following sequence starts: 1. 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 the next page for open blower vacuum switch.... When the water temp is 1º below the set temp is sensed, The blower vacuum switch, control loop, temp sensor & flame sensor are constantly monitored during step four, the heater fails to fire, please procced to the actual water temp. The control checks for more ...
Universal H Series Troubleshooting Guide
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.... 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 not energized.
.... 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 not energized.
Universal H Series Troubleshooting Guide
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... Control Panel 350 FDXLBCP1400 Kit-Bezel Control Panel 400 FDXLBCP1500 Kit-Bezel Control Panel 500 20 IDXLFLS1930 IDXLFLS1930 Flame Sensor (3" & 5") FDXLFSK1930 FDXLFSK1930 Fuse Kit FDXLWPS1930 FDXLWPS1930 Water Pressure Switch FDXLBVS1930 FDXLBVS1930 Blower Vacuum Switch FDXLBRN1930 ... Harness Kit (complete) FDXLICB1930 FDXLICB1930 ICB (integrated control board) FDXLIGN1930 FDXLIGN1930 Ignitor FDXLTER1930 FDXLTER1930 Thermistor (temperature sensor) IDXL2SNT1930 IDXL2SNT1930 Combustion Blower Tube Kit IDXL2DB1930 IDXL2DB1930 Prior 07/16-Display Board (only) FDXLEGL1931 FDXLEGL1931 Exhaust...
... Control Panel 350 FDXLBCP1400 Kit-Bezel Control Panel 400 FDXLBCP1500 Kit-Bezel Control Panel 500 20 IDXLFLS1930 IDXLFLS1930 Flame Sensor (3" & 5") FDXLFSK1930 FDXLFSK1930 Fuse Kit FDXLWPS1930 FDXLWPS1930 Water Pressure Switch FDXLBVS1930 FDXLBVS1930 Blower Vacuum Switch FDXLBRN1930 ... Harness Kit (complete) FDXLICB1930 FDXLICB1930 ICB (integrated control board) FDXLIGN1930 FDXLIGN1930 Ignitor FDXLTER1930 FDXLTER1930 Thermistor (temperature sensor) IDXL2SNT1930 IDXL2SNT1930 Combustion Blower Tube Kit IDXL2DB1930 IDXL2DB1930 Prior 07/16-Display Board (only) FDXLEGL1931 FDXLEGL1931 Exhaust...
Universal H Series Troubleshooting Guide
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... connections & retest (manometer attached) Is inlet YES pressure correct? 12. 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? YES Is there manifold gas pressure?
... connections & retest (manometer attached) Is inlet YES pressure correct? 12. 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? YES Is there manifold gas pressure?
Universal H Series Troubleshooting Guide
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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? 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? 12.
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? 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? 12.
Universal H Series Troubleshooting Guide
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Flame sensor & gas valve Step 12C Verify that the gas valve, inside the heater, is in the "ON" position. IF NOT, rotate knob to the ICB. IF ... step 12C. 12. IF correct, proceed to step 12B. IF correct, go to step 12D. 54 Ensure gas static, load, and manifold pressures are both flame sensor and gas valve are correct (See Page 16 & 17). IF OK, go to Step 12E. IF NOT, go to Step 12F. Service LED ON: "IF...
Flame sensor & gas valve Step 12C Verify that the gas valve, inside the heater, is in the "ON" position. IF NOT, rotate knob to the ICB. IF ... step 12C. 12. IF correct, proceed to step 12B. IF correct, go to step 12D. 54 Ensure gas static, load, and manifold pressures are both flame sensor and gas valve are correct (See Page 16 & 17). IF OK, go to Step 12E. IF NOT, go to Step 12F. Service LED ON: "IF...
Universal H Series Troubleshooting Guide
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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 present & no pressure (manometer attached), replace valve. IF OK, go to step 12H. ...55 Inspect Gas Orifices & Burners for damaged/wrong blower air inlet plate. Verify blower air inlet plate Step 12G Verify that the installed flame sensor is damaged, replace it with the 5" version (pg. 20). Clean as required. Inspect orifices & burner tubes Step 12H Check for blockage. IF damaged, replace (pg...
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 present & no pressure (manometer attached), replace valve. IF OK, go to step 12H. ...55 Inspect Gas Orifices & Burners for damaged/wrong blower air inlet plate. Verify blower air inlet plate Step 12G Verify that the installed flame sensor is damaged, replace it with the 5" version (pg. 20). Clean as required. Inspect orifices & burner tubes Step 12H Check for blockage. IF damaged, replace (pg...