Trane Blower Coil Air Handler BCHE048BAA10A2

Ensure all electrical power is disconnected, including remote disconnects.

Discharge all energy storing devices such as capacitors.

Follow proper lockout/tagout procedures.

Ensure a qualified licensed electrician is present if working with live electrical components.

Observe unit for any change in running condition.

Listen for any unusual noise from the unit.

Choose method for removing nylon standoffs

If using the latch method, are the standoffs retained on the metal panel?

Handling VelociTach Motor Control Board

Are you using an ESD protection wrist-strap?

Touch a grounded surface to discharge static buildup

Replace connectors carefully onto the appropriate board

Is the green wire attached to the engine board white connector?

Push the Test button on the WZS sensor

Check LED5 on the sensor for battery strength indication

Push the Test button on the WDS sensor

Check the display for battery life expectancy symbol

Disconnect all electric power, including remote disconnects, before servicing.

Follow proper lockout/tagout procedures.

Verify that no power is present with a voltmeter.

Check fan wheel set screws whenever a component is removed or an adjustment is made.

Refer to Table 44 for recommendations and note any adjustments made.

Disconnect all electric power, including remote disconnects, before servicing.

Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized.

Disconnect all electrical power to the unit.

Wear appropriate personal protective equipment.

Vacuum the section with a HEPA filter vacuum device.

Clean contaminated areas with a mild bleach and water solution or an EPA-approved sanitizer.