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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...) Fuse: 1.5A protects transformer G secondary, will fail if short occurs between fuse & ICB (FC3) Fuse: 2.5A protects transformer high H voltage secondary, will fail with blower, ignitor or ICB failure (FC4) I Low Voltage Output: 24VAC (P5) J High Voltage Output: 120VAC (P6) E I J D G H C F 5
...) Fuse: 1.5A protects transformer G secondary, will fail if short occurs between fuse & ICB (FC3) Fuse: 2.5A protects transformer high H voltage secondary, will fail with blower, ignitor or ICB failure (FC4) I Low Voltage Output: 24VAC (P5) J High Voltage Output: 120VAC (P6) E I J D G H C F 5
Universal H Series Troubleshooting Guide
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When the water temp is extinguished. 6. Blower starts pre-purge cycle as the ignitor heats up (20 Sec). 3. The control checks for open blower vacuum switch 2. At proper ignitor temp, a 4 second trial begins. The blower will turn off for one second. NOTE: If during call for more details outlining failure to the actual.... 4. The gas valve is de-energized, and the flame is 1º below the set temp to light operations. 7 The blower will operate for heat. 5. The ignitor is reached, the control ends the call for a 30 second post purge.
When the water temp is extinguished. 6. Blower starts pre-purge cycle as the ignitor heats up (20 Sec). 3. The control checks for open blower vacuum switch 2. At proper ignitor temp, a 4 second trial begins. The blower will turn off for one second. NOTE: If during call for more details outlining failure to the actual.... 4. The gas valve is de-energized, and the flame is 1º below the set temp to light operations. 7 The blower will operate for heat. 5. The ignitor is reached, the control ends the call for a 30 second post purge.
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 ...
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 ...
Universal H Series Troubleshooting Guide
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...) Description FDXLBWR1930 FDXLBWR1500 Blower FDXLFWP1930 FDXLFWP1930 Fuse Board (field wiring panel) FDXLWHA1930 FDXLWHA1930 Wiring 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 Gas Limit Switch...
...) Description FDXLBWR1930 FDXLBWR1500 Blower FDXLFWP1930 FDXLFWP1930 Fuse Board (field wiring panel) FDXLWHA1930 FDXLWHA1930 Wiring 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 Gas Limit Switch...
Universal H Series Troubleshooting Guide
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NO Replace ignitor: FDXLIGN1930 32 NO Contact Support (908) 355-7995 Replace blower: Please refer to (pg. 20) Ohm out the ignitor verifying: 8-25ohms Is the resistance YES incorrect? NO Replace ignitor: FDXLIGN1930 Replace blower: Please refer to (pg. 20) Is ignitor wiring YES damaged, pinched, or worn? 4. YES 9ohms (before Sept. 2010) OR for 8- NO Is blower wiring YES damaged, pinched, or worn? Open FC4 Fuse Open FC4 Fuse Inspect ignitor wiring for damage Ohm out blower for 4-5ohms (after Sept. 2010), is resistance correct?
NO Replace ignitor: FDXLIGN1930 32 NO Contact Support (908) 355-7995 Replace blower: Please refer to (pg. 20) Ohm out the ignitor verifying: 8-25ohms Is the resistance YES incorrect? NO Replace ignitor: FDXLIGN1930 Replace blower: Please refer to (pg. 20) Is ignitor wiring YES damaged, pinched, or worn? 4. YES 9ohms (before Sept. 2010) OR for 8- NO Is blower wiring YES damaged, pinched, or worn? Open FC4 Fuse Open FC4 Fuse Inspect ignitor wiring for damage Ohm out blower for 4-5ohms (after Sept. 2010), is resistance correct?
Universal H Series Troubleshooting Guide
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... wires are damaged, replace the damaged part (pg. 20). IF correct, contact technical support (908)355-7995. IF NOT, replace ignitor (pg. 20). Measure blower resistance Step 4C Before Sept. 2010 With power off, disconnect blower plug from ICB & measure resistance of...for 8-9 ohms. Models after Sept. 2010: measure for 4-5 ohms across the two terminal with wires. Disconnect ignitor from ICB. Open FC4 Fuse Ignitor and blower wiring Step 4A Verify ignitor resistance Step 4B Inspect the Ignitor & Blower wiring. Verify insulation is not damaged. IF correct, go to 4C. IF OK, go to...
... wires are damaged, replace the damaged part (pg. 20). IF correct, contact technical support (908)355-7995. IF NOT, replace ignitor (pg. 20). Measure blower resistance Step 4C Before Sept. 2010 With power off, disconnect blower plug from ICB & measure resistance of...for 8-9 ohms. Models after Sept. 2010: measure for 4-5 ohms across the two terminal with wires. Disconnect ignitor from ICB. Open FC4 Fuse Ignitor and blower wiring Step 4A Verify ignitor resistance Step 4B Inspect the Ignitor & Blower wiring. Verify insulation is not damaged. IF correct, go to 4C. IF OK, go to...
Universal H Series Troubleshooting Guide
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NO Replace ignitor: FDXLIGN1930 Replace ICB: FDXLICB1930 Ohm ignitor, verify 8-25 ohms (20°- Service LED ON: "IO" OR "SB" Code "IO" OR "SB" Code 38 Check display for "IO" code Is "IO" code present? NO YES Verify ignitor wiring is not damaged and plugged in securely The "SB" code may clear with a reset of range? YES 140°F), reading out of power, power cycle the heater Replace display/bezel/ keypad: (See Pg. 20) Is ignitor wire YES damaged? NO 7.
NO Replace ignitor: FDXLIGN1930 Replace ICB: FDXLICB1930 Ohm ignitor, verify 8-25 ohms (20°- Service LED ON: "IO" OR "SB" Code "IO" OR "SB" Code 38 Check display for "IO" code Is "IO" code present? NO YES Verify ignitor wiring is not damaged and plugged in securely The "SB" code may clear with a reset of range? YES 140°F), reading out of power, power cycle the heater Replace display/bezel/ keypad: (See Pg. 20) Is ignitor wire YES damaged? NO 7.
Universal H Series Troubleshooting Guide
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.../key pad (pg. 20). 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 ( 8-25 ohms between 20°- 140°F). IF "IO" does not appear, go to step 7C.... IF OK, go to the ICB. IF out-of-range, replace ignitor (pg. 20). 39 "Stuck Button" indicates display board is acting as if the button is securely attached to step 7D. Ohm out...
.../key pad (pg. 20). 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 ( 8-25 ohms between 20°- 140°F). IF "IO" does not appear, go to step 7C.... IF OK, go to the ICB. IF out-of-range, replace ignitor (pg. 20). 39 "Stuck Button" indicates display board is acting as if the button is securely attached to step 7D. Ohm out...