Digital Board Diagnostics - Maytag Amana PTC A Series Service Instructions Manual

DIGITAL BOARD DIAGNOSTICS

If a failure is detected on the digital board, there will be a green
light constantly lit up. This light is located under the OFF touch
pad button. The board will need to be programmed in the Diag-
nostic Mode to determine failure code and procedures to follow
to correct problem.
Diagnostic Maintenance & Status Report
The Diagnostic Maintenance & Status Report Mode provides
detailed information on PTAC control operation and operational
status including present modes, failures, airflow restriction warn-
ings, 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 con-
sume 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 Diagnostic and Status mode to view any
active codes. The unit may need additional cleaning or main-
tenance 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
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 definitions.
twice.
Operating Temperatures.
• If not in Diagnostic Status Report Mode, enter as instructed
above and press the Fan Speed
• If already in Diagnostic Status Report mode, press the
Fan Speed key. The display will show the tem-
perature of the desired set point, SP; the temperature at
the wireless thermostat, rL; the indoor ambient tempera-
ture 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 corresponding
failure code.
Past Failure Log
• If not in Diagnostic Status Report Mode, enter as instructed
above and press the Fan Speed
• 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
again. The codes are displayed last entry first 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.
key.
key twice.
key
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