Programming; Programming Procedure; Programmable Parameters - Dometic AH-Passport I/O Compact Operation Manual

Programming

P
ROGRAMMING
P
ROGRAMMING PROCEDURE
1. Enter Program Mode. (See "Entering Program Mode" above for details.)
2. Press and release the Fan button to increment from one program parameter to the next.
3. Use the Up and Down buttons to change the parameter's setting.
4. Press the Power button to exit Program Mode and return the control to Off Mode. Or, to memorize the changes as the
new defaults, simultaneously press the Up and Down buttons (optional).
P
ROGRAMMABLE
The system's default parameters may be changed by the installing dealer or end user. Once new values are entered and
memorized, the factory defaults are overwritten and the new parameters become the default values. You can restore the original
factory default parameters manually. A summary of the parameters, the permitted values, and original factory default settings of
each are listed in Table 2, page 10.
IMPORTANT
If you have any programming problems or confusion occurs, reset the Memorized Default Settings by entering
Program Mode and setting P-17 to "rSt".
P-1: Operating Mode
Select an operating mode: For Automatic Mode select "0", for Cool Mode select "1", for Heat Mode select "2".
P-2: High Fan Limit
Values for the upper fan-speed limit range from 65 to 95. Set a higher number to increase the fan speed or a lower number to
slow the fan speed.
P-3: Low Fan Limit
Values for the lower fan-speed limit range from 30 to 64. Set a higher number to increase the fan speed or a lower number to
slow the fan speed.
IMPORTANT
Once the high and low fan speed limits are set, the unit automatically readjusts the remaining speeds to produce six
equally spaced fan speeds in both Automatic and Manual Fan Modes.
P-4: (Reserved for future use)
P-5: Temperature Calibration
This feature calibrates the ambient sensor within a range of ±10°F. Adjust this parameter to display the correct room-
temperature reading. Note that setting increments are in °F even when the control is set to display °C.
P-6 through P-9: (Reserved for future use)
P-10: Display Brightness Control
The display brightness can be adjusted from 4 to 13, with 4 being the dimmest and 13 the brightest. Typically a dark cabin will
require a setting of 4 or 5. A very bright cabin will require a setting of 10 to 13.
P-11: Fahrenheit or Celsius Selection
The default setting is °F. Select °C for Celsius. (Celsius readings are displayed in tenths, for example 22.2°).
P-12: (Reserved for future use)
P-13: Reverse Automatic Fan Speeds During Heating
The automatic fan speeds can be reversed during Heat Mode to improve heat output in cooler climates. The fan will speed up
as the set point is approached. Lowering the fan speed when the cabin is cold increases head pressure and helps raise supply
temperature. Increasing the fan speed as the set point is approached also reduces unnecessary high pressure faults. The fan
switches to low speed when the set point is satisfied and the compressor cycles off. The fan can be programmed to operate the
same as in cooling by programming P-13 "nor" which represents normal fan operation during reverse cycle heating.
P-14: Cycle Fan With the Cooling or Heating Demand
You can program the fan to run continuously when the system is on, or allow it to cycle with the cooling or heating demand. The
default is "con" for continuous fan. To cycle the fan select "CYC".
IMPORTANT
When used with optional electric heat, the fan remains on for four minutes after the heater cycles off.
8
P
ARAMETERS
AH-Passport I/O Control Operations Manual
L-2232 ENGLISH