U 1
Operating Mode
0 or 1*
0 = Automatic Mode
1 = Cool Only Mode
2 = Heat Only Mode
U 2 High Fan Speed Limit 85 56 – 85
U 3 Low Fan Speed Limit 50 30 – 55
U 4 Compressor Staging Time Delay
15 or
135*
5 – 135 Seconds
U 5 Temperature Calibration 0 ± 10° F
U 6
Compressor Fail-Safe Protection
HHH = high freon pressure
PPP = low freon pressure (option)
3
0 = Fail Safe Protection OFF
1 = Continuous Restarts, No Display
2 = Continuous Restarts, With Display
3 = 3 Failures w/Display, Reset Required
U 7
Fahrenheit or Celsius Temperature
Display
0
0 = ° F
1 = ° C
U 8
Use Alternate Air Sensor
And/or Face Plate Air Sensor
0
0 = Alternate Sensor Override
1 = Toggle Between Both Sensors
U 9
Reversed Fan Speeds
During Heating
1
0 = Fan speed decreases as
set point is approached.
1 = Reversed Fan Speeds
U10
Continuous Fan Operation or
Cycle Fan with Compressor
1
0 = Cycle Fan with Compressor
1 = Continuous Fan Operation
U11
Reverse Cycle or Electric Heat
Option Installed
0
0 = Reverse Cycle Heat
1 = Electric Heat (see page 16)
U12 Fan Motor Type Selection
Set at
Factory
0 = Shaded Pole Fan Motor
1 = Split Capacitor Fan Motor
U15 De-Icing Cycle 0
0 = Off, 1 = One Minute
2 = Two Minutes, 3 = Three
Minutes
* Specific default settings for cool only a/c units (no heat option installed) should not be changed.
** Default parameter settings may be reprogrammed by user, enter new default settings in this column.