TROUBLESHOOTING |
| INTEGRATED FURNACE |
GUIDE |
| CONTROL MODULE |
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CHART 1
Place
1A1B
Indoor Blower
Check
1C
Does LED
flash 1 time YES when disconnect
is turned
ON?
NO
thermostat
fan switch in
the ON
position.
1D
Is 24V
present at YES control
terminals
R & C?
NO
Replace control.
Check operation.
Does indoor | YES |
blower run at |
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HEAT speed? |
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NO
1E
Is 24V
present at YES control
terminals
G & C?
NO
Return fan
switch to
AUTO position.
1F
Is 120V |
| Indoor blower | |
present at | YES | ||
fault. Repair or | |||
control terminals | |||
| replace. Check | ||
COOL & CIR |
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| operation. | ||
NEUTRAL? |
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NO |
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| Replace control. | |
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| Check operation. | |
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| Repair wiring | |
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| from control to | |
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| thermostat. Check | |
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| operation. |
TECHNICAL HELP
1G
Is 120V
present across
control terminals YES LINE & LINE NEUTRAL?
NO
Correct 120V
power supply. Check
operation.
1H NO
Is 120V
present at YES control terminals
XFMR & XFMR
NEUTRAL?
1I |
| 1J |
| 1K |
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Is 120V |
| Is 24V |
| Is 24V |
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| present |
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present across | YES | present across | YES | across |
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primary of control |
| secondary of |
| connector pins TH | YES |
transformer? |
| transformer? |
| & TR on the | |
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| control? |
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NO |
| NO |
| NO |
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Repair wiring to |
| Replace |
| Repair wiring |
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| and/or plug |
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transformer. Check |
| transformer. Check |
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| connection. Check |
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operation. |
| operation. |
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| operation. |
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!WARNING
If diagnostic indicator (LED)
shows continuous flashing, turn off gas supply at source before disconnecting electrical power!
190 |
