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DIAGNOSTIC MAINTENANCE & STATUS REPORT
The Diagnostic Maintenance & Status Report provides detailed information on PTAC control operation and operational status including
present modes, failures, airow restriction warnings, operating temperatures, and past failures. The lower right hand dot on the center
display ashes in this mode. In some cases the green LED located in the lower left hand corner of the touchpad below the OFF key will
also be lit. This Green LED “Status Light“ only illuminates if there is an status code that has been activated and should be reviewed.
In most cases, this light indicates that the indoor room lter is dirty should be cleaned or replaced. Dirty lters cause the unit
to consume more energy than normally needed to condition a room. Once the lter has been cleaned or replaced, the LED should go
out. If the LED is still illuminated after the lter has been cleaned, activate the Diagnostic and Status mode to view any active codes.
The unit may need additional cleaning or maintenance of the evaporator or condenser coils. Please perform this step before calling a
servicer.
servicer should be called.
DIAGNOSTIC STATUS REPORT MODE.
To enter Diagnostic Status Report mode, press and hold the up and down arrows and, while holding, quickly press the COOL key
twice.
Active Failures.
• If there are no active failures or lockouts, the display will show a double dash, “- -”. If there is a code listed, see the unit “Diagnostic
Codes” chart for a list of denitions.
Operating Temperatures.
• If not in Diagnostic Status Report Mode, enter as instructed above and press the Fan Speed
key.
• If already in Diagnostic Status Report mode, press the Fan Speed
key. The display will show the temperature of the desired
set point, SP; the temperature at the wireless thermostat, rL; the indoor ambient temperature behind the lter, IA; the indoor coil
temperature, IC; the indoor discharge air temperature, Id; the outdoor coil temperature, OC; the outdoor ambient temperature, OA;
and the spare probe temperature, IH. If any of the probes are not populated the display will show the corresponding failure code.
Past Failure Log
• If not in Diagnostic Status Report Mode, enter as instructed above and press the Fan Speed
key twice.
• If already in Diagnostic Status Report mode, press the Fan Speed
key. While the display is showing operating temperatures,
the last 10 failure codes active or past can be requested by pressing the Fan Speed
key again. The codes are displayed
last entry rst followed subsequently by each preceding code.
Note that modes F1 and Fd are also displayed in the normal control operation (see “Diagnostic Codes” chart).
To exit Diagnostic Status Report mode, press the OFF
key.
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