Sophomore Series 4000 & 5000 Cabinet - Classroom Air Handler - Owner's Manual - Installation, Operation, and Service Instructions
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ATTENTION:
Changeair is not responsible for injury to untrained or unauthorized personnel who attempt to do repairs based on
the trouble shooting procedures outlined in this section.
Your Changeair Classroom Air Handling Unit has been manufactured with great care and top rated quality control. Should you
experience problems with the operation of your Changeair Classroom Air Handler, follow one or more of the procedures below.
1.
Consult a qualified service technician, or call your Changeair sales agent to receive the name of a manufacture approved
service company.
2.
Determine the nature of the problem. For either a sequence of operation/control issue or mechanical problems, follow the
appropriate steps below.
7.1 Controls and Mechanical Issues
For Control Related Problems:
Locate and record the manufacturer name, model and serial numbers of the control device in question.
Refer to the supplied control “Owner/Operators” manual for assistance for programming or technical support lines available in
your region.
Literature and technical support are available for LON or BACNET controllers supplied with the unit through your Changeair
representative. For all other controllers, contact the controls contractor assigned with this product.
For Mechanical Related Problems:
Check the maintenance schedules to ensure that all cleaning schedules are up to date and air filters have been cleaned regularly.
Use the Trouble Shooting Guide (Refer to 7.2) to diagnose the problems.
Replace any parts with original equipment replacement parts available through your Changeair representative.
Should you need further assistance, locate the unit serial plate and record the Serial and Model Numbers and voltage. With this
information call your Changeair representative and request the technical support or service department.
7.0 Trouble Shooting Guide
7.2 General Air Handler Trouble Shooting
1.
Problem - Unit Tripped Breakers
a.
Reset or Replace. Note: Replacement breakers must be of the same rating, type and size.
b. Short circuit or incorrect unit wiring line voltage; check wiring.(See diagram located in unit electrical box)
c.
Transformer short-circuited to ground.
d. Incorrect low voltage wiring; check wiring. (See diagram located in unit electrical box)
