104
2. OVERSPEED OPERATION (CODE “66”)
Note: This code will only be displayed during the first
three minutes of blower operation and then only if
the call for fan is great enough to force the motor into
speed limit.
A. Is the duct work of the system restrictive or con-
fined? Or, maybe many (or all) of the supply reg-
isters are closed in the duct system. If so, the
motor may indicate that it is operating in power
limit under certain conditions by displaying code
“66”. Remove the restrictions or reconfigure the
duct work to avoid this code.
B. Is the motor set-screw not tightened to the motor
shaft? This may cause erratic motor operation
and cause the furnace to display a “66” fault
code. Further, airflow will be low or air may not be
moving at all.
3. INTERNAL ERROR – MOTOR UNABLE TO OPER-
ATE (FAULT CODE “61”)
If the blower motor is able to communicate with the
furnace control but is experiencing an internal issue
– such as overheating, the fault code “61” will be dis-
played. Internal overloading may reset once the con-
dition causing the problem has been removed.
However, it is likely that the motor will need to be re-
placed.
A. Is the motor wheel blocked by an obstruction? If
so, the motor may be in locked-rotor state and the
furnace control will report fault code “61”. Remove
the obstruction and try to operate the motor
again. If the motor continues to fail, it may be per-
manently damaged and may need to be replaced.
B. Is the motor overheating? If so, it may report an
overheat condition to the furnace control and the
control will report fault code “61”. Determine the
cause of overheating and repair. Try to operate
the motor again. If the motor continues to fail, it
may be permanently damaged and may need to
be replaced.
4. INTERNAL ERROR – MOTOR ABLE TO
OPERATE (FAULT CODE “60”)
This is a low-level fault that is not likely to be dis-
played often. Operation will continue as normal but
fault code will be displayed. Long-term permanent
damage to the motor is not expected.
DIAGNOSTICS AND TROUBLESHOOTING
DIAGNOSING BLOWER MOTOR ISSUES
!
FIGURE 66
LOW VOLTAGE CONNECTION PIN DETAIL
Di
ag
no
sti
cs
Содержание (-)98VA060M317USA
Страница 12: ...Field Conversions FIELD CONVERSIONS 12 ...
Страница 13: ...FIELD CONVERSIONS Field Conversions 13 SEE NExT PAGE FOR APPLICABLE CONFIGURATIONS ...
Страница 15: ...Field Conversions 15 ...
Страница 16: ...Field Conversions ST A1194 68 00 16 ...
Страница 17: ...Field Conversions 17 ...
Страница 18: ...Field Conversions 18 ...
Страница 43: ...43 CONDENSATE DRAIN CONDENSATE DRAIN DRAIN NEUTRALIzER cont Condensate Drain FIGURE 29 ST A1194 70 00 ...
Страница 86: ...86 Timing Diagram TIMING DIAGRAM TABLE 16 TIMING DIAGRAM FOR A CALIBRATION GAS HEAT SEqUENCE ST A1240 03 00 ...
Страница 87: ...87 TIMING DIAGRAM TABLE 17 TIMING DIAGRAM FOR NON CALIBRATION GAS HEAT SEqUENCE Timing Diagram ST A1240 04 00 ...
Страница 92: ...92 Diagnostics TABLE 19 R98V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS ...
Страница 93: ...93 TABLE 19 continued R98V FAULT CODES WITH DESCRIPTIONS AND SOLUTIONS Diagnostics ...
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Страница 105: ...105 FIGURE 67 MODULATING ECM FURNACE WIRING DIAGRAM Troubleshooting ...
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Страница 108: ...108 CM 0717 ...