Trane DH1B040A9241C Series Service Facts Download Page 24 | Manualshive

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Trane DH1B040A9241C Series Service Facts Download Page 24

24

UH1-DH1-SF-1L

Service Facts

DEFINITION: External Gas
Valve Circuit Error (24 volts is
present when it should not be
present)

Is 24 VAC nominal voltage

present between Red lead at gas

valve connection to chassis

ground?

Turn Comfort

Control to “OFF”

position

Correct wiring

Check operation

YES

Replace IFC

NO

7 Flash Fault LED

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Summary of Contents for DH1B040A9241C Series

Page 1: ...tal 60 000 57 000 30 60 95 94 2 DIRECT 10 x 7 1 4 See Fan Performance Table 1 3 1075 115 1 60 Centrifugal Direct 1 1 15 3450 115 1 60 1 75 No High Velocity 1 17x25 1in 2 Round Aluminized Steel Type I...

Page 2: ...ltiport Inshot 6 115 1 60 12 9 20 1 2 H x W x D 41 3 4 x 26 1 2 x 30 1 2 205 193 UH1D100A9601C Upflow Horizontal 97 000 92 150 35 65 95 94 2 DIRECT 11 x 10 1 4 See Fan Performance Table 3 4 1100 115 1...

Page 3: ...t Inshot 6 115 1 60 12 9 20 1 2 H x W x D 41 3 4 x 26 1 2 x 30 1 2 205 193 DH1C085A9481C Downflow Horizontal 80 000 76 000 30 60 95 0 DIRECT 11 x 10 1 4 See Fan Performance Table 1 2 1075 115 1 60 Cen...

Page 4: ...l be de energized The indoor blower motor will continue to run for the fan off period Field selectable at 60 100 140 or 180 seconds then be de energized by the control module CARBON MONOXIDE POISONING...

Page 5: ...erate fiber concentrations requiring additional respiratory protection Use the appropriate NIOSH approved respirator in these situations FIRST AID MEASURES Eye Contact Flush eyes with water to remove...

Page 6: ...6 UH1 DH1 SF 1L Service Facts continued on next page WIRING DIAGRAM From Dwg D345803P01 Rev A...

Page 7: ...UH1 DH1 SF 1L Service Facts 7 SCHEMATIC DIAGRAM From Dwg D345803P01 Rev A...

Page 8: ...8 UH1 DH1 SF 1L Service Facts continued on next page WIRING DIAGRAM From Dwg D345804P01 Rev A...

Page 9: ...UH1 DH1 SF 1L Service Facts 9 SCHEMATIC DIAGRAM From D345804P01 Rev A...

Page 10: ...cover 6 to 8 screws and the top burner bracket Lift burners from orifices NOTE Be careful NOT to break igniter when removing burn ers Clean burners with brush and or vacuum cleaner Reassemble parts b...

Page 11: ...7 1636 1416 1192 UH1C100A9481C 4 3 2 1 HIGH Black MED HIGH Blue MED LOW Yellow LOW Red 1982 1892 1759 1593 1912 1832 1712 1557 1836 1765 1660 1521 1761 1696 1604 1485 1679 1621 1536 1433 1593 1538 146...

Page 12: ...460 375 561 462 378 308 459 363 286 235 DH1B065A9421C 4 3 2 1 HIGH Black MED HIGH Blue MED LOW Yellow LOW Red 1501 1442 1346 1225 1453 1393 1308 1197 1402 1341 1263 1160 1344 1285 1212 1116 1283 1227...

Page 13: ...ing External Gas Valve Circuit Fault 25 8 Flash Troubleshooting Low Flame Sense Fault 26 9 Flash Troubleshooting Igniter Relay Fault 27 Furnace PSC Fan Motor No Air Flow The following pages include tr...

Page 14: ...cles 10 Cir Blower on Delay Heat 45 Seconds Cir Blower on Delay Cool 2 Seconds IND Output 2 2FLA 3 5 LRA 120VAC Humidifier Air Cleaner Max Load 1 0 A 120VAC For upflow models replace with part CNT0754...

Page 15: ...t Continuous ON Replace IFC Continuous OFF Check Power 2 Flashes System Lockout Retries or Recycles exceeded 3 Flashes Pressure Switch Error 4 Flashes Open High Limit Device 5 Flashes Flame sensed whe...

Page 16: ...ge present from transformer and fuse good YES NO Repair low voltage wiring replace transformer or fuse as needed Repair high voltage connection to unit What is the fault light flash code See FAULT LED...

Page 17: ...heck operation YES Disconnect electrical power to furnace Connect manometer to oulet gas pressure connector NO Cycle power to furnace and call for heat YES DEFINITION RETRY Lock Out 3 unsuccessful tri...

Page 18: ...18 UH1 DH1 SF 1L Service Facts...

Page 19: ...e switch is okay Re attach wire to PS NO Note 1 24 volts Open Switch 0 volts Closed Switch DEFINITION An error has occurred with the P S The error will be reported indicating that the pressure switch...

Page 20: ...r temperature above 85 F NO Return air temperature is above max limit YES Check for loose insulation or other objects within furnace air stream NO Is outlet manifold gas pressure within specifications...

Page 21: ...rom burners impinging on sides of heat exchanger NO YES When fan comes on do flames stay consistent Replace heat exchanger Check operation NO Replace Roll out switch Check operation YES DEFINITION Lim...

Page 22: ...iping per installation instructions Using a back up wrench install new gas valve Check operation Inspect gas supply for leaks and have gas supplier check gas quality Are there signs of moisture or deb...

Page 23: ...to furnace YES Reverse 120 vac power leads to furnace wiring Reconnect power Check operation Connect volt meter to black incoming and chassis ground at burner box NO Does meter read 120 vac Disconnec...

Page 24: ...Circuit Error 24 volts is present when it should not be present Is 24 VAC nominal voltage present between Red lead at gas valve connection to chassis ground Turn Comfort Control to OFF position Correc...

Page 25: ...es with flame sensor Meter must be set up for DC micro amp scale Is flame current measured less than 1 0 micro amp DC Cycle power to furnace and call for heat Replace flame sensor Check operation Is f...

Page 26: ...ted Verify igniter harness is not damaged and connectors are tight Disconnect igniter and check resistance Is resistance reading between 37 70 ohms at 75F NO Replace ignitor Check operation YES 9 Flas...

Page 27: ...r Is fuse blown YES Replace fuse NO Is 24 VAC measured between G and B C at the low voltage connections Check thermostat and wiring to thermostat YES NO Is line voltage measured between motor common a...

Page 28: ...it reserves the right to change design and specifications without notice Trane 6200 Troup Highway Tyler TX 75707 For more information contact your local dealer distributor Literature Order Number UH1...

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