18 DIAGNOSING AN ISSUE
Troubleshooting:
F1: BLOWER (Blower Running Status Bad)
YES
Is Status Indicator A backlit
on the “Test” Screen?
(see page 23)
NO
Is the wiring
harness properly
connected?
Check the Motor
Controller, Blower
Motor, and I/O
Control Board.
NO
(See page 61 for
schematic.)
YES
Replace Blower
Motor (page 53) or remove obstruction.
NO
Is the Blower Motor
spinning freely?
YES
NO
Correct the wiring
or replace I/O Control Board (page 39)/Motor Controller (page 32) if damaged.
Do resistance measurements between windings and chassis agree with values on Motor Windings Resistance Table?
(Figure 24, below)
NOYES
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Replace Blower |
| Replace | ||
Motor. (page 53) |
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| Motor Controller. | |||
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| (page 32) | |
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TO | FROM | DESCRIPTION | EXPECTED RESISTANCE |
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Black | Red | Winding | |
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Black | White | Winding | |
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Red | White | Winding | |
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Black, Red or White | Green | Windings to Chassis | Open |
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: Motor Windings Resistance Table
