Mitsubishi Electric M-SERIES Installation and operating instructions

Application Note: 3048
How to turn the indoor unit fan off when set point
is met

Introduction
M-Series:
•SVZ/MVZ
•SLZ
•SEZ
This application note is to help configure a M-Series or P-Series indoor unit to have
the indoor unit fan to turn off when the room temperature is the same as the set
point. This is also called turning the fan off during Cooling or Heating thermal off
states. There are three methods to achieve this:
1. For most indoor units, function codes 25 (Heating) and 27 (Cooling) need to be
change via a remote controller
2. For only the M-series ductless units, jumpers (or resistors) have to be physically
cut with cutting pliers.
3. Using the Thermostat Interface
Below is a list of indoor units that are compatible with each method.
Remote controllers that
can change indoor unit
function codes:
•kumo cloud®
•MHK1
•Touch MA (PAR-CT01MAU-SB)
•Wired MA (PAR-33MAA)
•Simple MA (PAC-YT53CRAU)
P-Series:
•PKA
•PCA
•PLA
•PEAD
•PVA
Method 1: Indoor Units
that use function codes: Method 2: Indoor Units that cut jumpers/resisters:
M-Series:
•MSZ (All wall mounts)
•MFZ
•MLZ
Using the thermostat
Interface to turn the fan off:
•Thermostat Interface
(PAC-US444CN-1)

Kumo cloud®
Kumo cloud configuration requires
a Wireless Interface and the kumo
cloud app
1. Tap Settings
2. Tap System Setup
3. Tap Installer Settings
4. Enter 9999
5. Tap Installer Login
6. Tap the name of the Site
7. Tap the name of the Zone
8. Tap Advanced
9. Select Thermal OFF Fan
10. Select the desired Stop function
9
10

MHK1
1. Press and hold the Fan and Up
button simultaneously to enter
settings mode. (Figure 1).
2. “Wait” will be displayed up to 40
seconds.
3. Press the button that indicates
Next or Back to reach the
function setting. (Figure 2)
4. Press the Up and Down arrows
to change the mode (number) of
the function setting. (Figure 3)
5. Press Done when finished.
Setting 125 Thermal OFF Fan
(Heating)
1. Extra Low
2. Stop
3. Selectable Fan Speed
Setting 127 Thermal OFF Fan
(Cooling)
1. Selectable Fan Speed
2. Stop
3. Not Supported
1
3
4
2
Figure 1
Figure 2
Figure 3

Touch MA
1. Turn the controller OFF
2. Select the wrench icon
3. Scroll to the right and select Service
4. Enter the maintenance password
9999 and push “Select”
5. Scroll down and select Settings
6. Select Function setting
7. Leave “Ref. Address” at 0then scroll
down to “Unit No.” and select All
8. Scroll down to Mode 25 (heating) or
27 (cooling)
9. Select setting 2 for thermal off in
either mode and push “Select” to
save the settings
1
2
3
4
5
6
7
8
9

Wired MA
1. Turn the controller OFF
2. Push the Menu button
3. Select the Service menu
It is on the 3rd page which can be
reached using the page button
4. Enter the password 9999
and push the select button
5. Scroll down and select
Function Setting
6. Leave “Ref. Address” at 0
then scroll down to
“Unit No.” and select All
7. Scroll down to Mode 25 or
27
8. Select setting 2for thermal
off in either mode and push
“Select” to save the settings
Toggle between settings
by using the side arrows
Setting 25 Thermal OFF
Fan (Heating)
1. Extra Low
2. Stop
3. Selectable Fan Speed
Setting 27 Thermal OFF
Fan (Cooling)
1. Selectable Fan Speed
2. Stop
3. Not Supported
2
7
3
4
6
1
5
8

Simple MA
Make sure the unit is turned OFF
1. Press and hold the B C and D buttons
simultaneously until the function
settings screen appears
2. Press B once so that it displays 00
and then press D
3. Press B until you see AL and then
press A
4. Press B until you reach function 25
(heating) or 27 (cooling) and then
press D
5. Press B or C to change the setting
number to 2for thermal off in either
mode
1. Press D and repeat Step 4 if you wish to make
changes to both modes at the same time
6. Press Ato save the settings
7. Press and hold the B C and D buttons
simultaneously to exit the function
settings screen
2
1
3
4
5
6
7

Function Settings lists can be found in the
outdoor unit service manuals:
SUZ-KA Service Manual
PUZ-NHA6 Service Manual

Indoor Units with Jumpers
The jumper/resistor labeled:
•JR01*: Fan speed while thermal off in
heating (*or JRTU for MSZ-FH)
•Jumper on: Very Low
•Jumper cut: Stop
•JRRE: Fan speed while thermal off in
cooling
•Jumper on: Determined by the remote
controller
•Jumper cut: Stop
*For MSZ-FH models the jumper that
determines thermal off in heating is
JRTU
The diagrams for the location of the
jumpers can be found in the Indoor Unit
Service manuals. The best diagrams are
found in the Troubleshooting section
under Test point diagram section.
To remove the jumper simply cut both
ends using a pair of small cutting pliers.
MSZ-GL: JR01
MSZ-GL: JRRE
The indoor units that require cutting
jumpers/resistors are the following:
•MSZ (All wall mounts)
•MFZ (All floor mounts)
•MLZ (One-way cassettes)

Thermostat Interface
The Thermostat Interface can be
configured to turn off the indoor unit
fan OFF when the third party 24VAC
thermostat senses the room temp has
met the thermostat’s set point.
The Thermostat Interface has two
dipswitches SW1-1 & SW1-2 that
need to be change from default OFF
to ON to have a Delayed Off function
set to 0 minutes. This will cause the
system to turn OFF, which the indoor
unit fan will also turn OFF, when the
thermostat is satisfied.