Specifications

IM 938-4 / Page 23 of 42
Premium (Programmable) Digital
Touchpad Control Features
LED with
Program
Setting
Display
8- Push
Button
Display
Inputs
9-LED
Indicators
Application
The PTAC Digital Control is used to control a PTAC Unit
that includes both an integral air conditioner and a source of
heat.
The Digital Control is operated with a Touchpad.
Inputs and Outputs
• Indoor coil sensor, (ICS)
• Outdoor coil sensor, (OCS)
• Indoor air sensor, (IAS)
• Outdoor air sensor, (OAS)
• Remote T’stat, T’STAT (RCWYBG)
• Heat Fan Lock Out (HFLO)
• Power supply: (24VAC)
• Line voltage input, (L1, L2)
• Indoor fan standby voltage, (L1STB L2STB)
• Control selection: (LUI, T’STAT
• Model selection: (AC/E, HP, HP/E)
• Time delay bypass, (TEST)
• Indoor off fan cycle: (FAN, OFF CYCLE–10, 20,
30, 1 HR)
Outputs
• Compressor output, COM
• Indoor fan, BLOWER LO, HI
• Outdoor fan, OUTDOOR FAN
• Electric heater, ELE
• Reversing valve, REV VALVE
User Interface
The user will by default control the Electronic Controller via
the touchpad. The user can select with a jumper for the unit
to receive commands from a Remote Thermostat.
Table 3: Keys and Indicators Labels
ON/OFF, FAN SPEED, MODE,
8 Push Buttons
FAN MODE, SLEEP, PROG-ON/OFF
Temp buttons: for
Temp UP and for Temp DOWN
9 LED Indicators
SLEEP, COOL, COOL/DRY, FAN,
HEAT, HIGH, LOW, CYCLE, CONT.
LED 2 Digit Displays No Label
Display Function Legend
Tr = Room Temperature
hI = High Room Temperature
Lo = Low Room Temperature
LA = Low Ambient Lockout
= Secondary (Slave) Unit Touchpad Display - Indicates
Unit is Controlled by a Master. Occurs when Slave
“Control Select” Jumper is on SEC Pins
rT = Remote Thermostat Control
tP = Touchpad Control
t = Time
Ts = Temperature Setpoint
Rf = Room Freeze Condition
CF = Coil Freeze Protection
F = Fahrenheit
C = Celsius
LC = Control Lockout Mode Turned ON
nL = Control Lockout Turned OFF
Premium, Programmable Digital Touchpad
with Automatic Changeover from Cooling
to Heating & Heating to Cooling
AUTO
Available with the Programmable LUI (668003802) and Pre-
mium Board (667997303) only. The Auto-Changeover board
has a new control set with a touchpad label that shows,
“AUTO”. The Auto Changeover control provides:
• Auto changeover from heat to cool and vice versa
• LED's from top down that read: Sleep, Cool, Auto, Fan,
and Heat