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Maintenance & Troubleshooting
(continued)
Reseting Limit Switch
Figure 16
Remove Plug to Access
Limit Switch Reset
Button, Replace Plug
when Complete
Use a long blunt tool to depress limit
switch reset button
NOTICE
If a new air filter is needed for your RetroAire replacement PTAC/
PTHP, consult factory for availability and/or proper sizing.
DANGER
Electrical shock hazard
— disconnect power to the
RetroAire replacement PTAC/PTHP before servicing or ac-
cessing the control compartment. Failure to do so could result
in severe personal injury or death.
5 kW heat models only
☐
— in the event the limit switch opens and
de-energizes the electric heat, the limit switch will need to be manu-
ally reset.
To reset switch:
Remove the control box cover.
•
Locate the limit switch.
•
Push in the reset button on the face of the switch.
•
WARNING
Clean or replace the return air filter as needed. Allowing dust
to collect on the filter will cause the unit to lose efficiency and
eventually malfunction. Check the filter at least once a month.
Some environments may require more frequent replacement,
depending on particulate in the air stream.
Reset Button
*Note:
Button will pop
out when limit
switch opens. Push
in to reset.
Replacement Packaged Terminal Air-Conditioning / Heat Pump
• Installation, Operation, and Maintenance Manual •
The Right Fit for Comfort
24
P/N 240008639, Rev. B [8/16/2011]