© 2006
GE ECM
by Regal-Beloit
- 41 -
Indoor Blower Motors
v0.2
It’s also a good idea to check the control wiring in the system as well before
beginning the troubleshooting process. Even in matched systems there are many
wiring options depending on the type and style of components connected to the air
handler.
This step goes hand in hand with the OEM manuals, especially when single stage
and multi-stage equipment is combined in one system. There will not only be specific
wiring options for these types of systems but there may also be specific settings
required on the OEM board.
A quick look at the picture below will remind us of just how many system to system
options there are, including IAQ devices.
After the system wiring and set-up are confirmed, we need to determine if this is an
operational motor problem or a failed motor problem. Keep in mind that even a
system that is not currently running could be an operational system problem.
For Example:
If the system has been tripping on limit due to a plugged filter, the control board may
have locked it out. Resetting the system will most likely get it to run again, but not for
very long. This is an operational motor problem, where the motor and the system are
operating, but there are other factors that caused the service call.