Manual 2100-614I
Page
8 of 43
GENERAL PROGRAMMING OVERVIEW
MC4002 CONTROLLER BUTTONS AND FUNCTION
On/Off Button
1. Press and release the On/Off button to turn On controller, 4-character display will illuminate and Lead unit LED will light.
2. Press and release the On/Off button to turn Off controller. Controller will go dark and A/C units will stop.
Comfort Button
1.
Press and release the Comfort button to change the Cooling Setpoint to 72F and the Heating Setpoint to 68F for a period of 1 hour.
2. Setpoints will return to the programmed settings automatically after 1 hour.
3. Pressing the Comfort button during the 1 hour period will deactivate the Setpoint change.
4. The temperature display will flash the current temperature while in override mode.
Program Button
1. Press the Program button and release it when the message “Prog” appears on the display.
2. Refer to Programming Instructions and follow these commands to change from Default settings.
Advance/Change/Save Button
1. Press and release the Advance button to swap lead and lag unit positions.
2. When in Program mode the Down and Up buttons are used to scroll through the programming steps.
3. A flashing display means that the particular function of that programming step is “set”, and the display will alternate between the step
function and the setting.
4. To change the setting press the Change button and the display will stop flashing, allowing change to the setting.
5. Use Down or Up arrows to change setting as desired, and press the Save button and proceed as desired.
6. When done with programming changes press the Program button until display stops flashing and room
temperature is shown.
Up and Down Buttons
These buttons are used to change the settings in conjunction with the Advance/Change/Save button when in programming mode.
CONTROLLER PROGRAMMABLE FEATURES AND DEFAULT SETTINGS
Order/
Display
Description
Range/Choice
Default
LSEn
Temperature at local (main) sensor
—
—
SP
Cooling setpoint temperature
65 to 90F (18 to 32C)
77F (25C)
db
Deadband between cooling SP and heating setpoint
2 to 40F (1 to 24C)
17F (9.4C)
r1
Temperature at remote sensor 1 location, if connected
—
—
r2
Temperature at remote sensor 2 location, if connected
—
—
cFAn
Continuous blower operation
None, Lead, Both
None
deg
Controller system operates in F or C
F or C
F
Alt
Alternating Lead-Lag-Lead-Lag sequence or Non-Alternating Lead-Lead-Lag-Lag sequence —
Yes = Alternating
Yes or No
Yes
LLCO
Lead-Lag changeover time (Days)
1 - 30 days, or 0 for disabled
7
HP
Heat pump logic enabled — only for 1-stage heat pumps and forces Lead-Lag sequence
(overrides a Non-Alt setting)
Yes or No
No
Cbd5
Unit 1 and 2 blowers automatically both run if delta T >5F between any 2 connected sensors
Yes or No
Yes
OFde
3-minute lead unit & 4-minute lag unit off-delay enabled
Yes or No
No
crun
Minimum 3-minute compressor runtime enabled
Yes or No
No
LoAL
Low temperature alarm setpoint
28 to 65F (-2 to 18C)
45F (7.2C)
HAL1
High temperature alarm level #1 setpoint
70F to 120F (21 to 49C)
90F (32C)
HAL2
High temperature alarm level #2 setpoint
70F to 120F (21 to 49C)
95F (35C)
Locd
Controller is locked and no changes can be made. Consult building authority.
If locked, display will show
Locd if changes attempted
Unlocked
Inter-Stage Differential
ISd2
From Stage 1 to Stage 2
2, 3, 4, 5 or 6F
4
ISd3
From Stage 2 to Stage 3
2 or 3F
2
ISd4
From Stage 3 to Stage 4
2 or 3F
2
On/Off Differential (Hysterisis)
CSon
Turn "On" above SP for Stage 1 Cooling
+1 or 2F
2
CSoF
Turn "Off" below SP for Stage 1 Cooling
-1, 2, 3 or 4F
-2
Stage 2, 3 and 4 Cooling automatically set same as Stage 1 decisions
HSoo
All Heating Stages are equal -/+ on & off differential
-1/+1 or -2/+2
-2/+2
CoPr
1 or 2-stage compressor, if set to 1 the 2nd stage Cooling Alarm activates on Cooling Call 2,
if set to 2 the 2nd stage Cooling Alarm activates on Cooling Call 3
1 or 2
1
ob5d
Differential between Local and On-Board Sensor
12 to 20, OFF
12
