LENNOX M0STAT64Q-2 Indoor Unit Programmable Controller Instruction Manual

: September 5, 2022
: Lennox

Table of Contents

M0STAT64Q-2 Indoor Unit Programmable Controller
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M0STAT64Q-2 Indoor Unit Programmable Controller

INSTALLATION/ OPERATION INSTRUCTIONS
M0STAT64Q-2 Indoor Unit Programmable Controller (22U20)
CONTROLS
507644-03 10/2021 Supersedes 507644-02

IMPORTANT

This manual must be left with the owner for future reference.

WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer (or equivalent) or service agency.

Specifications

Input voltage

5 VDC

Ambient temperature 23~110°F (-5~43°C)

Frequent changes to operating mode may cause system malfunction. Allow at least one minute between mode changes to allow the system to stabilize.
Shipping and Packing List
Package 1 of 1 catalog number 22U20 contains:
1 Wired Controller 1 Lithium battery 3 Screws (mount to wall) 2 Screws (mount to J-box) 2 Plastic spacers (J-box) 1 Connection Cable A with connector for all indoor
units 1 Connection Cable B with connector for MMDA/B,
MCFA/B, M22A and M33A/B/C indoor units 1 Connection Cable C with connector for MWMA/B
indoor units
1 Connection Cable D for MWMC indoor unit
1 Installation and operation manual

Ambient humidity

RH40%~RH90%
1

General
The M0STAT64Q is a wired programmable local controller for mini-split indoor units with convenient timed schedules for daily operation. These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.
Dimensions

Requirements
Be sure that power supply has been turned off before beginning installation. This controller should be used only as described in this manual. Do not install the controller on outside walls (where there is unconditioned space on opposite side of wall) or in locations where direct sunlight may be present.

120mm (4.7″)

18.5mm (0.7″)

46mm (1.8″)

123mm (4.8″)

83.5mm (3.3″)

62mm (2.4″)

Figure 1. M0STAT64Q Dimensions

Wiring Connections

WARNING
Be sure that power supply has been turned off before beginning installation.
CAUTION
Clean controller using a clean, damp cloth. Do not spray cleanser on or around controller.

WARNING
Do not operate controller with wet hands.
CAUTION
Do not install controller in areas where heavy oil, vapor, or gases containing sulfur may exist or the controller may be damaged.

2

IMPORTANT
Read all of the information in this manual before using this controller. All wiring must conform to local and national building and electrical codes and ordinances. This is a 5 VDC controller. Do not install on voltages higher than 5 VDC.
· This manual provides the installation instructions for this controller. Refer to the included wiring diagrams to connect the controller to the indoor unit.
· The controller uses low voltage. Keep a minimum distance of 12″ (305 mm) between low voltage control wire and high voltage power wires.
· Ground the shielded control wiring.

IMPORTANT
The provided cables must be used. Do not use excessive force while pulling the cable or when making the connections.
· Do not use a megger to test insulation. · The controller cable length should not exceed
164 ft (50 m).
1. Use the wiring connections illustrations (Figures 2 and 6) to connect the controller to the indoor unit. NOTE – Connection details for wall-mounted units differ from the other indoor unit types.
2. Select the cable exit route from the back of the controller.
3. Include a drip loop in the cable.

4-conductor shielded wire on the controller

Cable A

Indoor unit main board

Cable B 3 ft. 7 in. (1.1m)

CN40

Receiver board (Gray cable with blue tag for all units
that require the WYE cable.)

Figure 2. Wiring Connections MMDA/B, MCFA/B, M22A and M33A/B/C
3

CN 40
Connect to controller

CN 40 Connect to controller
Figure 3. MMDA/B Main Board

Figure 4. M22A and M33A/B/C Main Board
Connect the Programmable Wired Controller to the factory installed CN4 port cable

CN 40
Connect to controller

Figure 6. MFMA Main Board

Figure 5. MCFA/B Main Board
4

Cable A

Cable C

Receiver board CN403

4-conductor shielded wire on the controller
Figure 7. Wiring Connections MWMA/B

CN 403
Connect to controller

Factory-connected to Display Board

NOTE – CN 403 is used to connect either the M0STAT64Q local controller OR a centralized control. It is not possible to connect both the M0STAT64Q controller and a centralized control to this unit.
Figure 8. MWMA/B Receiver Board

Receiver board The connection cable D

Display board

The connection cable A 4-core shielding wire on the controller

CN40 X Y E 5V

CN1

White

Red

Yellow Brown

Figure 9. Wiring Connections MWMC
5

MWMC receiver board uses terminals for the programmable wired controller.
Figure 10. MWMC Receiver board

Optional Programmable Wired Controller

Factory installed CN4 Adapter Cable

Indoor unit main board
Factory installed Adapter Board

CN4

CN20 CN1

Wire Controller Cable

20 Foot Cable provided with Programmable Wired Controller

Figure 11. Wiring Connections to MFMA

6

4. Seal the cable entrance to the controller casing and any wall penetrations to prevent water

1
PCB

3

1

PCB

1
2
PCB

¹Use snips to notch the controller casing to allow the cable to pass through.

Figure 12. Select Cable Route
from entering the controller. 5. Reattach the controller to the back plate. Be
careful not to pinch or bind the wires.

Figure 14. Reattach Controller to Back Plate

Sealant

Drip Loop

Sealant

Drip Loop

Figure 13. Prevent Water from Entering Controller Casing

7

Installation 1. Remove the controller from the back plate us-
ing a flat-head screwdriver.

3. J-box installation – Adjust the length of the two plastic spacers as needed to allow the controller to be mounted flush with the wall.
NOTE Be sure to provide for future maintenance by allowing enough slack in the wiring to allow the controller to be removed from the wall if needed.

Back plate

Switch box

Screw (M4×20)

Slots

Figure 15. Remove Back Plate

Screws (M4×25)

2. Mount the back plate as appropriate for your

Figure 17. Attach Back Plate to J-box

application.

4. Insert the provided battery into controller,

Back plate

positive side out. The battery stores the day and time in case of power outage. Replace

the battery when it’s charge is depleted.

5. Reattach the controller to the back plate. Be

careful not to pinch or bind the wires.

Screws (M4×20)

Figure 16. Attach Back Plate to Wall

8

Display

Operation Mode

Fan Speed

Horizontal and Vertical Swing (not available for all indoor unit models)

Faceplate Not Follow me Function Used Function

Turbo/PTC

Schedule

On/Off Timer

¹ Displays cooling set point, heating set point or room temperature

°F or °C
¹Temperature display Lock Indication Room Temperature
Clock

9

Description of Buttons

Swing button (Swing function not available for all indoor unit
models)
Timer Day Off/
Delete
Decrease

Swing

Timer

Day off/Del

Confirm

Back/Turbo

Copy/ Follow me

Mode

–

Fan speed (Lock)

Copy/ Follow me Back/Turbo Confirm Mode
Power Increase
Fan speed (Lock)

10

Setup Set the Current Day and Time 1. Press and hold the Timer button for 3 sec-
onds. 2. Use the + and – buttons to select the day. The
selected day will flash. 3. Press the Timer button to complete the date
setting. 4. Use the + and – buttons to set the current time.
NOTE the controller uses a 24-hour clock. 5. Press the Timer button to complete the time
setting.
Select Fahrenheit or Celsius for display Press and hold the Back/Turbo button and the Copy/Follow me button simultaneously for 3 seconds to toggle between displaying degrees Fahrenheit or degrees Celsius.
To Set Room Temperature Sensor Location Press the Copy/Follow me button to toggle between having the room temperature sensed by the indoor unit or by the controller. NOTE – The Follow me indicator will display on the screen when the room temp is being sensed by the controller.
Key Pad Tone (beep) 1. Press and hold the Swing button and the Tim-
er button simultaneously for 3 seconds to turn off the key pad tone. 2. Press and hold the Swing button and the Timer button simultaneously for 3 seconds again to turn on the key pad tone.
11

Operation To Start/Stop Operation Press the Power button.
To set the operation mode 1.Press the Mode button to set the operation
mode. 2.Use the + and – buttons to scroll through the
mode selections. · Auto System will automatically switch be-
tween heating and cooling depending on the temperature sensed. · Cool System operates in cooling mode. · Dry System removes humidity according to preset conditions (fan speed and set point temperature, not a humidistat sensor). Cannot adjust fan speed. · Heat System operates in heating mode. · Fan Fan only, no heating or cooling.
To Set (or change) the Set point Press the + and – buttons to set the setpoint. NOTE – the set point range is 62-86°F (17-30°C).
To Set the Fan Speed Press the Fan speed (Lock) button to scroll through the fan speeds. Auto Low Med High
To Set Child Lock Function 1. Press and hold the Fan speed (Lock) button
for 3 seconds to lock all of the controller buttons. 2. Press and hold the Fan speed (Lock) button again for 3 seconds to unlock all of the buttons.

Turn ON/OFF Turbo Function Press the Back/Turbo button to activate and deactivate the turbo functionality. · Cooling Mode – Turbo sets the indoor unit
fan speed to high for a factory-set period of time.
Set Swing Function Press the Swing button to adjust louver direction and oscillation. 3. Press the Swing button to adjust the louver
position. Each press moves the louvers 6°. 4. Press and hold the Swing button for two sec-
onds to begin continuous louver oscillation. The Swing icon displays on the screen. Swing functionality not available for all indoor unit types. 5. For cassette units only, adjust each of the four louvers independently. Press and hold the Swing button for two seconds. The Swing icon will flash. Press the increase or decrease buttons to select the louver to adjust (the -0 setting makes all louvers move at the same time). After selecting the louver to adjust, press the Swing button to adjust the louver angle. Each press moves the louver 6°.

12

Timer and Schedules

Use the Timer button to setup Weekly schedules Create Schedules (up to 8 events per day)

or to setup timed operation for the indoor unit. 1. Press the Timer button until Week is high-

Timers are used to schedule On/Off operation only. Schedules are used to change operational settings for defined periods of time (events).

lighted. 2. Press the Confirm button. 3. Use the + and – buttons to select the day of the
week to setup the scheduled events.

Setup Timed Operation Start Time

4. Press the Confirm button.

1. Press the Timer button until Day On is high- 5. Setup the first event of the schedule.

lighted.

2. Press the Confirm button.

Create and Setup Scheduled Events (up to 8

3. Use the + and – buttons to set the time to start events per day)

operation.

1. After selecting the scheduled day.

4. Press the Confirm button.

2. Use the + and – buttons to set the start time of the event. The display will show the event’s

Setup Timed Operation Stop Time

start time, mode, set point and fan speed.

1. Press the Timer button until Day Off is high- 3. Press the Confirm button to confirm the start

lighted.

time and move to the operation mode selec-

2. Press the Confirm button.

tion.

3. Use the + and – buttons to set the time to stop 4. Use the + and – buttons to select the opera-

operation.

tion mode for the event.

4. Press the Confirm button.

5. Press the Confirm button to confirm the op-

eration mode and move to the set point se-

Setup Timed Operation Start and Stop Time

lection.

1. Press the Timer button until Day On/Off is 6. Use the + and – buttons to set the set point

highlighted.

for the event.

2. Press the Confirm button.

7. Press the Confirm button to confirm the set-

3. Use the + and – buttons to set the time to start

point and move to the fan speed selection.

operation.

Not available when operation mode is set to

4. Press the Confirm button

Fan or Off.

5. Use the + and – buttons to set the time to stop 8. Use the + and – buttons to select the fan

operation.

speed for the event.

6. Press the Confirm button.

9. Press the Confirm button to confirm the fan

speed and complete the settings for this

event. Not available when operation mode is

13

set to Auto, Dry or Off. 10. Follow steps 2 through 9 to setup the next
event. Each event ends at the start time of the next event. NOTE – Use the Back/Turbo button to return to the previous step during event setup.
Activate and Deactivate Timed Operation 1. Press the Timer button to activate timed op-
eration. 2. Press the Power button to deactivate timed
operation.
Setup Days Off Setup a day, or multiple days, within the scheduled week for which the indoor unit will not operate. When the day arrives, the unit will be powered off and will not operate until the next day’s first event. Once the set day has passed, the Day Off setting is automatically removed. 1. Press the Timer button. 2. Press the Confirm button. 3. Use the + and – buttons to select the day of
the week. 4. Press the Day off/Del button. 5. Press the Back/Turbo button. 6. Follow steps 3 and 4 for every day off required.
Copy a Schedule to a New Day All events for the scheduled day will be copied.

Press the Timer button until Week is high-
lighted. 2. Press the Confirm button. 3. Use the + and – buttons to select the day to
copy from.

4. Press the Copy/Follow Me button. The letters “CY” will be displayed on the screen.
5. Use the + and – buttons to select the day to copy to.
6. Press the Copy/Follow Me button to confirm. 7. Press the Back/Turbo button to return to the
weekly timer. 8. Follow steps 3 through 7 to copy a schedule
for additional days.
Edit a Scheduled Event 1. Press the Timer button until Week is high-
lighted. 2. Press the Confirm button. 3. Use the + and – buttons to select the day of
the week. 4. Press the Confirm button. 5. Use the + and – buttons to select the event to
edit. The display will show the event’s start time, mode, set point and fan speed. 6. Use the + and – buttons to change the start time of the event. 7. Press the Confirm button to confirm the start time and move to the operation mode selection. 8. Use the + and – buttons to change the operation mode for the event. 9. Press the Confirm button to confirm the operation mode and move to the set point selection. 10. Use the + and – buttons to change the set point for the event.

14

11. Press the Confirm button to confirm the setpoint and move to the fan speed selection. Not available when operation mode is set to Fan or Off.
12. Use the + and – buttons to change the fan speed for the event.
13. Press the Confirm button to confirm the fan speed and complete the changes for this event. Not available when operation mode is set to Auto, Dry or Off.
NOTE – Use the Back/Turbo button to return to the previous step.
Delete an Event from a Scheduled Day This action cannot be undone. 1. Press the Timer button until Week is high-
lighted. 2. Press the Confirm button. 3. Use the + and – buttons to select the day of
the week. 4. Press the Confirm button. 5. Use the + and – buttons to select the event to
delete. The display will show the event’s start time, mode, set point and fan speed. 6. Press the Day off/Del button.
15

Troubleshooting Fault Codes

Programmable

Wired

Indoor Unit Error Codes Description

Controller

E1

Communication error between indoor unit and outdoor units

E2

Indoor room temperature sensor error (T1)

E3

Indoor coil temperature sensor error (T2)

E4