TROUBLESHOOTING |
| INTEGRATED FURNACE |
GUIDE |
| CONTROL MODULE |
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CHART 3
3A3F
Inducer Draft Motor | Call for heat. |
and | Thermostat |
Pressure Switch | contacts |
Check | R & W close. |
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| Is induced | YES |
| draft motor | |
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| energized? |
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| NO |
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| 3B |
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NO | Is diagnostic |
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LED flashing 2 |
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| times? |
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3C YES
Disconnect
electric power
at fuse or
circuit breaker.
3D
Test for
continuity across pressure switch.
Is diagnostic
LED flashing 3
times?
YES
3G
Jumper
pressure
switch.
3H
Does ignitor
glow?
3I YES
Place incline manometer in series with pressure switch tubing.
NO
NO
Check inducer
wiring. If OK,
repair or replace
inducer motor.
Check operation.
Replace pressure switch. Energize system. Check operation.
| 3E |
| 3J |
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| Is |
NO |
| Is pressure |
| pressure |
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| greater than | ||
| switch welded |
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| pressure switch | |||
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| closed? | ||
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| specs? | |
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| YES | 3K | NO |
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| Remove vent | |
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| connector |
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| from furnace | |
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| flue collar. |
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YES | Replace pressure | |
switch. Check | ||
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| operation. |
TECHNICAL HELP
!WARNING
If diagnostic indicator (LED)
shows continuous flashing, turn off gas supply at source before disconnecting electrical power!
3L
Is |
| Correct blocked | |
pressure | YES | ||
or incorrectly | |||
greater than | |||
| installed vent. | ||
pressure switch |
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| Check operation. | ||
specs? |
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NO
Repair leaks in
inducer assembly or
replace induced
draft motor. Check
operation.
192 |
