S-16H Ecm Cfm Adjustments Avptc/Mbvc - Goodman ComfortNet ASXC Series Service Instructions Manual

SERVICING
Motor Checks
HIGH VOLTAGE!
Disconnect ALL power before servicing
or installing. Multiple power sources
may be present. Failure to do so may
cause property damage, personal injury
or death.
1. Disconnect power to air handler or modular blower.
NOTE: Motor contains capacitors that can hold a charge for
several minutes after disconnecting power. Wait 5 minutes
after removing power to allow capacitors to discharge.
2. Disassemble motor as described in steps 2 through 4
above.
3. Locate the 3-circuit harness from the motor. Using an
ohmmeter, measure the resistance between each motor
phase winding. The resistance levels should be equal.
Replace the motor if the resistance levels are unequal,
open circuited or short circuited.
4. Measure the resistance between each motor phase
winding and the motor shell. Replace the motor if any
phase winding is short circuited to the motor shell.
5. Reassemble motor and control/end bell in reverse of
disassembly. Replace blower assembly into air handler
or modular blower.

S-16H ECM CFM ADJUSTMENTS AVPTC/MBVC

This section references the operation characteristics of the
AVPTC/MBVC models. The MBVC models utilize an
integrated air handler control. The air handler control
provides ECM blower motor control and includes all
dipswitches necessary to set up the cooling, heat pump and
electric airflow characteristics.
The control has three banks of dipswitches: a bank for
cooling airflow and trim adjustment, a bank for selecting one
of (4) enhancement profiles and enabling dehumidification,
and a bank for selecting the installed electric heater kit size.
Adjustments are made by selecting the appropriate ON/
OFF combinations of the dipswitches. The dipswitches
along with their functions are shown in the figures below.
Cooling Airflow Dipswitches - Used to set the desired
cooling airflow
Tap A Tap B
OFF ON OFF ON
1 1
2 2
Cooling Airflow Speed Tap (* indicates factory setting)
Airflow Adjust Dipswitches - Used to adjust the airflow +/-
10%
Normal* +10%
OFF ON OFF ON
3
3
4
4
Airflow Adjust Taps (* indicates factory sett ing)
Ramping Profile Dipswitches - Used to select a comfort
profile for the cooling mode.
Tap A* Tap B
OFF ON OFF ON
5 5
6 6
Cooling Airflow Ramping Profiles (* indicates factory
Dehumidification Disable/Enable Dipswitch - Reduces cool-
ing airflow by ~ 15% when enabled AND when used with a
humidistat (such as DEHUM1). Airflow is reduced when a
call for cooling is present and the humidistat is open.
OFF ON
DEHUM
7
8
Unused
Electric Heater Airflow - Airflow for installed electric heaters
is set by adjusting the dipswitches to the appropriate heater
size.
Tap D*
Tap C
OFF ON OFF ON
1 1
2 2
-10% Normal
OFF ON OFF ON
3 3
4 4
Tap C Tap D
OFF ON OFF ON
5 5
6 6
setting)
Move to the ON position to
enable dehumidification
75