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The Diagnostic Maintenance & Status Report provides detailed
information on PTAC control operation and operational status
including present modes, failures, airflow restriction warnings,
operating temperatures, and past failures. The lower right hand
dot on the center display flashes 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 filter is dirty should be cleaned or replaced.
NOTE:
Dirty filters cause the unit to consume more energy than
normally needed to condition a room. Once the filter has been
cleaned or replaced, the LED should go out. If the LED is still
illuminated after the filter has been cleaned, activate the Diag-
nostic 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.
A servicer should be called only if cleaning the filter or
coils does not clear the status code or the code indicates that
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 defini-
tions.
Diagnostic Maintenance & Status Report
OPERATING TEMPERATURES.
• If not in Diagnostic Status Report Mode, enter as in-
structed above and press the Fan Speed
key.
• If already in Diagnostic Status Report mode, press the
Fan Speed
key. The display will show the tempera-
ture of the desired set point,
SP
; the temperature at the
wireless thermostat,
rL
; the indoor ambient temperature
behind the filter,
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 correspond-
ing failure code.
PAST FAILURE LOG.
• If not in Diagnostic Status Report Mode, enter as in-
structed 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 oper-
ating 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 first fol-
lowed 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.
