RedLINK™ Wireless Remote Controller Kit
Installation Manual
MHK2: MRCH2 Controller, MIFH2 Receiver, and MRC2 Cable
⚠️ DISCONNECT POWER BEFORE BEGINNING INSTALLATION. Can cause electrical shock or equipment damage.
ℹ️ Must be installed by a trained, experienced technician. Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.
Installation at a Glance
This manual covers the installation and setup of the MHK2 Remote Controller with Mitsubishi Electric indoor units.
Before you begin, you must attach the cable to the CN105 connector on the indoor unit control board, then follow the steps in this document.
ℹ️ Note: Remote Controllers are linked to specific indoor units. Each indoor unit must have a dedicated Remote Controller and Wireless Receiver.
ℹ️ Note: Your device's PIN code is your date code added to 1234. For example, a date code of 2010 plus 1234 would give you a device PIN of 3244.
© 2019 Mitsubishi Electric US, Inc. Suwanee, GA 30024 All Rights Reserved. https://mhk2.meushvac.com/ 1-800-433-4822
MHK2 is compatible with kumo cloud® when connected with the Wireless Interface 2 or later.
RedLINK Technology
Mounting Wall Plate
1. Open package to find the Wall Plate.
2. Position the Wall Plate on the wall. Level and mark hole positions.
- Drill holes at marked positions, and then lightly tap supplied wall anchors into wall using a hammer.
- Drill 7/32" holes for drywall.
3. Place the Wall Plate over the wall anchors. Insert and tighten mounting screws supplied with the Wall Plate. Do not overtighten. Tighten until the Wall Plate no longer moves.
Install Batteries
Insert AA batteries into the designated slots, observing polarity (+/-).
Mounting MHK2 RedLINK™ Wireless Remote Controller
1. Align the Wall Plate with the MHK2 Controller and push gently until the MHK2 snaps in place.
2. If needed, gently pull to remove the MHK2 Controller from the Wall Plate.
ℹ️ Note: Avoid locations where there are air drafts (e.g., top of staircase, air outlet), dead air spots (behind a door), direct sunlight, or concealed chimney or stove pipes.
Optional Decorative Cover Plate Installation
Use the Optional Cover Plate when:
- Mounting the controller to an electrical junction box.
- Covering paint gaps from an old controller.
4. Separate the Junction Box Adapter from the Cover Plate.
5. Mount the Junction Box Adapter to the wall or an electrical box using any of the eight screw holes. Insert and tighten mounting screws supplied with the Cover Plate Kit. Do not overtighten. Ensure the Adapter Plate is level.
6. Attach the Wall Plate by hanging it on the top hook of the Junction Box Adapter and then snapping the bottom of the Wall Plate in place.
7. Snap the Cover Plate onto the Junction Box Adapter.
Install Cable and RedLINK™ Wireless Receiver
ℹ️ Note: If using a Mitsubishi Electric Wireless Interface 2 with the kumo cloud® app, refer to "kumo cloud®" on page 13.
1. Connect the MRC2 cable to the CN105 connector on the indoor unit control board.
2. Route the MRC2 cable outside the electrical box and to the preferred installation location of the RedLINK Wireless Receiver.
3. Attach the 5-pin connector to the Wireless Receiver.
ℹ️ Notes:
- Do not cut or modify the cable.
- Do not block vents on the indoor units.
4. Mount the Wireless Receiver next to the indoor unit in the orientations shown, or inside the indoor unit's Wireless Interface pocket if available.
Link All Devices to RedLINK™ Network
ℹ️ Note: The receiver does not have a power status light. Ensure the indoor unit has been powered up.
1. Press and release the CONNECT button.
2. If the CONNECT light does not flash, another receiver or RedLINK™ Wireless Receiver might be in wireless setup mode. Exit wireless setup at the other device.
3. Ensure only one unit is in wireless setup mode at a time and complete setup before connecting another MHK2 and unit.
Connect LED Status:
- Flashing Green: In wireless setup mode.
- Fast Flashing Green: In the process of pairing.
- Solid Green: At least one RedLINK™ device is enrolled onto the receiver.
- Amber: Please wait.
- Red: RedLINK™ device is not communicating.
- Off: No RedLINK™ devices are enrolled onto the receiver.
ℹ️ Notes:
- The flashing status light times out after 15 minutes of inactivity. Press CONNECT again if necessary.
- The RedLINK™ connection is securely established when the solid green light appears.
Indoor Air Sensor (IAS)
1. Press and release the CONNECT button on the receiver.
2. Ensure the receiver is in wireless setup mode (connect LED is slowly flashing green). If the CONNECT light does not flash, another receiver or RedLINK™ Wireless Receiver may be in wireless setup mode. Exit wireless setup mode at the other device.
3. Press and release the CONNECT button on the IAS.
4. When pairing starts, the CONNECT lights on the IAS and the receiver will both be fast flashing green.
5. After successful enrollment, the CONNECT light on the IAS will be solid green briefly, then turn off.
6. Check for the IAS option in the temperature source and humidity source settings on the controller.
ℹ️ Notes:
- Your controller can only use one IAS.
- If the IAS light is solid red, it may have failed to enroll or has disconnected. Re-enroll and check the distance between the IAS and the receiver.
Link Remote Controller to RedLINK™ Receiver
ℹ️ Note: In most homes, the Remote Controller can connect at distances of 200 feet. Try to avoid walls or other blockages, but they should not affect the RedLINK signal.
1. Press SELECT to establish a link to the RedLINK™ receiver.
2. Within 30 seconds, the link between the MHK2 Controller and RedLINK receiver will be established, showing "Success" on the display.
3. Press DONE to display the home screen.
4. The MHK2 Controller will display a "WAIT" screen while receiving data from the indoor unit. While on the "WAIT" screen:
- If the controller shows the RedLINK™ disconnected icon ❌ at the top-right, the controller has lost connection with the receiver.
- If the controller shows the RedLINK™ connected icon ✔️, the controller is connected to the receiver.
- To unenroll the receiver, press and hold the bottom-center of the controller's screen for 5 seconds. The controller will then unenroll all RedLINK™ connections.
Exit RedLINK™ Setup
Press and release the CONNECT button on the RedLINK™ receiver to exit wireless setup (the light should stop flashing and remain solid).
ℹ️ Note: The RedLINK™ Wireless Receiver will automatically exit wireless setup after 15 minutes of inactivity.
ℹ️ Note: If installing more than one receiver, you must exit RedLINK™ setup on the previous receiver before attempting wireless setup of subsequent controllers/receivers.
Initial Installer Setup
After the MHK2 Controller has communicated correctly with the indoor unit, the MHK2 Controller will change from the "Wait" screen to the "Initial Installer Setup" screen and show START SETUP.
1. The MHK2 will search for support of indoor unit function codes. If it finds indoor unit support, the controller will load the Function Code setup. If the controller does not find indoor unit support, it will load the Installer Set Up (ISU). See page 10 for a full list of ISU options.
2. Touch ◀️ or ▶️ to toggle between Function Code/ISU options.
3. Touch Edit or touch the text area, and then touch ◀️ or ▶️ to edit default setup options.
4. Touch Done or touch the text area to confirm the setting or press Cancel.
5. Touch ◀️ or ▶️ to continue to setup another ISU option.
6. To finish setup and save your settings, scroll to the FINISH SETUP screen at the end of the ISU list.
ℹ️ Note: To see a list of all setup parameters, go to "Installer Setup Options (ISU) – Advanced Menu" on page 10. The MHK2 Controller displays the ISU name and the ISU number.
Installer Setup – Advanced Menu (After Initial Installation)
To access the advanced menu, press and hold the Menu button for 5 seconds. Touch ◀️ or ▶️ to go through the options in the advanced menu.
Advanced Menu Options
- Function Codes: Used to access device Function Code settings.
- Device Setup: Used to access device ISU settings.
- Screen Lock: The controller touch screen can be set to partially or fully lock. Partial lock allows temporary overrides. Full lock permits no overrides. The device can always be unlocked.
- Unenroll Device: Remove a connected receiver or controller.
- Reset: Access all reset options on the MHK2 Controller. This is the only place to access factory reset.
- Alert History: Saves the last 25 alerts. The oldest alert is removed when the list is full.
- System Test: Test wireless communications or heating and cooling equipment.
M-Series & P-Series Indoor Unit Function Codes
ℹ️ Note: Default settings for Function Codes 1-28 are automatically determined by the HVAC equipment. Setup may take up to 40 seconds to enter and 30 seconds to exit. Refer to the indoor unit manual for unit-specific function codes and their values. A summary is shown in the following tables.
| Mode # | Indoor Unit Compatibility | Function | Setting # | Settings |
|---|---|---|---|---|
| 1 | All | Power Failure Auto Recovery | 1 2 *1-1 | Not available (OFF) Available (ON) approximately 4 minute delay |
| 2 | All | Indoor Temperature Detection | 1 2 3 *2-1 | Average data from all units Return air Remote Controller |
| 3 | All | Lossnay Connectivity | 1 2 3 | IDU does not intake OA through Lossnay IDU does intake OA through Lossnay Not supported |
| 4 | All | Power Supply Voltage | 1 2 | 230 volt 208 volt |
| 5 | PEAD | Auto Mode | 1 2 | Energy saving cycle automatically enabled Energy saving cycle automatically disabled |
| 7 | All | Filter Sign | 1 2 3 | 100 hours 2500 hours No filter sign indicator |
| 8 | SLZ/PLA *D PCA/PKA | Air Flow (Fan Speed) | 1 2 3 | Quiet Standard High ceiling |
| 8 *D | SEZ/SVZ/PEAD/PVA | Static Settings | 1 2 3 | See "Static Pressure Settings" on page 12. 4 directions or all 4 3 directions or just 3 2 directions or just 2 |
| 9 | PLA | Number of Air Outlets | 1 2 3 | Not supported Supported See "Static Pressure Settings" on page 12. |
| 10 | PLA *D PCA | High Performance Filter Also Static Settings | 1 2 | Not supported Supported |
| 10 *D | SEZ/SVZ/PEAD/PVA | Static Settings | 1 2 3 | See "Static Pressure Settings" on page 12. Downward setting (vanes angle setup 3) Middle setting (vanes angle setup 1) Draft less setting (vanes angle setup 2) *11 |
| 11 *D | PLA | Horizontal Vane Setting | 1 2 3 | No setting Draft less setting (vane angle setup 1) Downward setting (vanes angle setup 2) |
| 11 | SLZ *D PCA | Horizontal Vane Setting | 1 2 | Draft less setting (vane angle setup 1) Downward setting (vanes angle setup 2) |
| 11 *D | SVZ/PEAD/PVA | Heater Control (Used with Mode 23) | 1 2 | No heater present Heater available |
| 12 | SLZ-KF/ PLA-A_EA7 *12-1 *12-2 | 3-D i-See Sensor Positioning | 1 2 3 | Position 1 Position 2 Position 3 |
| 13 | SVZ/PVA | Optional Humidifier | 1 2 | Not supported Supported |
| 14 | PLA PCA/PKA | Vane Differential Setting in Heating Mode (Cold Wind Prevention) | 1 2 3 | 75-82 °F TH5 82-90 °F TH5 90-100 °F TH5 |
| 15 | SLZ/PLA SEZ/SVZ/PEAD PCA/PKA | Frost Prevention Temp | 1 2 | (2 °C) 36 °F (3 °C) 37 °F |
| Mode # | Indoor Unit Compatibility | Function | Setting # | Settings |
|---|---|---|---|---|
| 16 | SVZ/PVA | Humidifier Control | 1 2 | With compressor only In Heat mode all the time |
| 17 | PLA PCA/PKA | Change of Defrosting Control | 1 2 | Standard High humidity |
| 23 *D | PLA-BA | Vane Swing | 1 2 | Swing Wave air flow |
| 23 *D | PCA/PKA | Vane Swing | 1 2 | Not available (OFF) Available (ON) |
| 23 *D | SLZ *D SEZ | Heater Control *23-1 | 1 2 | Set temp -4.5 °F ON Set temp -1.8 °F ON |
| 23 *D | SVZ/PEAD/PVA | Heater Control *23-1 | 1 2 | Disable heater during Defrost/Error Enable heater during defrost and error *23-2 |
| 24 | SLZ/PLA SEZ/SVZ/PEAD PCA/PKA *24-1 | Heating Height Offset 4 | 1 2 | Available (ON) 4 °C (7.2 °F) up Not available (OFF) |
| 25 | SLZ/PLA SEZ/SVZ/PEAD/PVA PCA/PKA | Fan Speed Thermo-Off Heating | 1 2 3 | Extra low Stop RC setting |
| 26 *D | SLZ-KF/PLA-A_EA7 *12-1 *12-2 | 3D i-See Sensor Height Offset Setting | 1 2 3 | Low (less than 8.9 feet) Standard (8.9 to 11.5) High (11.5 to 14.8) |
| 26 *D | SVZ | Erv Control | 1 2 | IDU STOP, fan speed STOP, and CN2C is OFF IDU STOP, fan speed is RC Setting, and CN2C is ON |
| 27 | SLZ/PLA SEZ/SVZ/PEAD PCA/PKA | Fan Speed Thermo-Off Cooling | 1 2 3 | RC setting Stop Extra Low *27-1 |
| 28 | SLZ/PLA SEZ/SVZ/PEAD PCA/PKA | Detection of Abnormal of the Pipe Temperature (P8) | 1 2 | Available (ON) Not Available (OFF) |
Notes: *D Duplicate code with multiple settings for different indoor unit types. *1-1 When the power supply returns, the air conditioner will start 3 minutes or 1 minute later (hinge on outdoor unit). *2-1 Can be set only when a wired or RedLINK Remote Controller is used. *11 Because condensation may form, do not use this setting in a high-temperature, high-humidity environment. *12-1 Cassette must have 3D i-See Sensor installed to operate, refer to install manual. *12-2 When the 3D i-See Sensor corner panel position is changed, change this mode. *23-1 For the detail of heater control, refer to the service manual. *23-2 Heater will only operate during a communication error between indoor unit and outdoor unit. *24-1 PKA-HA(L)/KA(L): 3.6°F (2°C) up. *27-1 Only SLZ and PLA are able to set this setting.
Installer Setup Options (ISU) – Advanced Menu
| ISU # | ISU Name | ISU Options (defaults in bold) | Notes |
|---|---|---|---|
| 134 | Central Controller Present | • Not installed • Installed | The control determines the correct setting based on whether the central controller was linked to the system. If the central controller is installed in the system, then the device will function as a non-programmable device and only single setpoint will be supported. |
| 139 | Fahrenheit Celsius | • Fahrenheit • Celsius | The control determines the correct setting based on the equipment the receiver is plugged into. |
| 142 | System Type | • Heat pump (Heat & Cool) • Cool only | If ACO is selected, system mode options will be Heat, Off, Cool, and Auto. If MANUAL is selected, AUTO mode is disabled during operation and not selectable by the user. |
| 144 | Auto Changeover | • Manual Changeover (MANUAL) • Auto Changeover (ACO) • Auto Changeover Single Setpoint (Single SP) | This ISU setting is not shown when ISU 134 is set to INSTALLED or ISU 142 is set to COOL ONLY. MANUAL and ACO settings are shown if ISU 134 is set to NOT INSTALLED. SINGLE SP is defaulted if ISU 134 is set to INSTALLED. MANUAL and ACO options are suitable for use with kumo cloud® and a Wireless Interface. |
| 145 | Deadband | • 3 to 8 °F (in 1 °F increments) • 2.0 to 4.5 °C (in .5 °C increments) | This ISU is shown if Auto Changeover (ACO) is selected. |
| 146 | Drying Mode | • Disabled • Enabled | This ISU is shown if dry mode is supported by the indoor unit. |
| 150 | Schedule Owner | • The MHK2 alone can be used to establish a schedule • kumo cloud® alone can be used to establish a schedule | This ISU is not shown if the MHK2 is NOT connected to a Wireless Interface 2 or later model. |
| 151 | Schedule Type | • No schedule • Mo-Su • Mo-Fr/Sa-Su • Mo-Fr/Sa/Su • M/T/W/T/F/S/S | |
| 152 | Schedule Off Periods | • Disabled • Enabled | If disabled, Schedule Power Off in schedule mode cannot be used. |
| 153 | Residential/ Commercial Schedule | • Residential • Commercial | When set for Residential, the schedule periods are Wake, Leave, Return, Sleep. When set for Commercial, the schedule options are Occupied and Unoccupied. |
| 161 | Lockout System On | • Disabled • Enabled | If enabled, the controller will show a lock symbol ? at the bottom of the screen and not allow the user to adjust the mode from off to on. If the user attempts to adjust the mode from off to on, the lock symbol will flash. This will keep the Remote Controller from turning on the equipment. The equipment will need to be remotely turned on. |
| 162 | Lockout System Off | • Disabled • Enabled | If enabled, the controller will show a lock symbol ? at the bottom of the screen and not allow the user to adjust the mode from on to off. |
| 163 | Lockout Mode | • Disabled • Enabled | If enabled, the controller will show a lock symbol ? at the bottom of the screen and not allow the user to adjust the mode from the current mode to any other mode, except for Off. If the user attempts to adjust the mode, the lock symbol will flash. The user will still be able to turn the unit on and off only. |
| ISU # | ISU Name | ISU Options (defaults in bold) | Notes |
|---|---|---|---|
| 164 | Lockout Fan Speed | • Disabled • Enabled | If enabled, the controller will show a lock symbol ? at the bottom of the screen, and if the user attempts to modify the fan setting, the lock symbol will flash. |
| 165 | Lockout Setpoint | • Disabled • Enabled | If enabled, the controller will show a lock symbol ? at the bottom of the screen and "Partial Lock" in the user menu will be hidden. If the user attempts to modify the setpoint, the lock symbol will flash and keep the current setpoint. |
| 167 | Lockout Vane Direction | • Disabled • Enabled | If enabled, the controller will show a lock symbol ? at the bottom of the screen, and if the user attempts to modify the vane direction, the lock symbol will flash. |
| 170 | Hide Indoor Temperature | • Disabled • Enabled | If enabled, indoor temperature is not shown in the display. |
| 171 | Hide Indoor Humidity Display | • Disabled • Enabled | If enabled, indoor humidity is not shown in the display. |
| 180 | Max Heat Setpoint | • 40 to 90 °F (4.5 to 32.5 °C) | The Max Heat Setpoint can be adjusted to any whole number between 40 and 90 °F, as well as half increments between 4.5 and 32.5 °C. |
| 181 | Min Cool Setpoint | • 50 to 99 °F (10 to 37 °C) | The Min Cool Setpoint can be adjusted to any whole number between 50 and 99 °F, as well as half increments between 10 and 37 °C. |
| 190 | Indoor Temperature Source | • MHK2 • Indoor unit • RedLINK™ sensor • Average of MHK2 and RedLINK™ sensor (IAS) | Options 2 and 3 not shown if the RedLINK™ Indoor Air Sensor is not enrolled. MHK2: The MHK2 built-in thermistor (default). RedLINK™ Sensor: A RedLINK™-connected wireless indoor temperature/humidity sensor. Average: An average of the MHK2 sensor and RedLINK™-connected wireless indoor temperature/humidity sensor. Averaging does not work with the kumo cloud® bluetooth wireless temperature and humidity sensor. |
| 191 | Indoor Temperature Display Offset | • -5 °F to 5 °F (-2.5 °C to 2.5 °C) | The Indoor Temperature Display Offset can be adjusted to any whole number between -5 and 5 °F, as well as half increments between -2.5 and 2.5 °C. 0 is the default. |
| 195 | Indoor Humidity Source | • MHK2 • RedLINK™ sensor • Average of MHK2 and RedLINK™ sensor (IAS) | Options 1 and 2 will not be shown if the RedLINK™ Indoor Air Sensor is not enrolled. MHK2: The RedLINK™ Sensor thermistor (default). RedLINK Sensor: A RedLINK™-connected wireless indoor temperature/humidity sensor. Average: An average of the RedLINK™ Sensor and RedLINK™-connected wireless indoor temperature/humidity sensor. Averaging does not work with the kumo cloud® bluetooth wireless temperature and humidity sensor. |
| 196 | Indoor Humidity Display Offset | • -10% RH to 10% RH | The Indoor Humidity Display Offset can be adjusted to any whole number between -10 and 10 RH. 0 is the default. |
Static Pressure Settings
PEAD-AA
| External Static Pressure | Setting No. Wired or RedLINK Remote Controller | |
|---|---|---|
| Mode No. 8 | Mode No. 10 | |
| 35 Pa | 2 | 1 |
| 50 Pa | 3 | 1 |
| 70 Pa | 1 | 2 |
| 100 Pa | 2 | 2 |
| 125 Pa | 3 | 2 |
SEZ
| External Static Pressure | Setting No. Wired or RedLINK Remote Controller | |
|---|---|---|
| Mode No. 8 | Mode No. 10 | |
| 5 Pa (0.02 in. WG) | 1 | 2 |
| 15 Pa (0.06 in. WG) | 1 | 1 |
| 35 Pa (0.14 in. WG) | 2 | 1 |
| 50 Pa (0.20 in. WG) | 3 | 1 |
SVZ - Vertical, Horizontal Left & Right
| External Static Pressure | Setting No. Wired or RedLINK Remote Controller | |
|---|---|---|
| Mode No. 8 | Mode No. 10 | |
| 0.3 in. WG (75 Pa) | 1 | 1 |
| 0.5 in. WG (125 Pa) | 2 | 1 |
| 0.8 in. WG (200 Pa)* | 3 | 1 |
* Regarding to down flow setting, please refer to down flow kit installation manual.
SVZ -Downflow
| External Static Pressure | Setting No. Wired or RedLINK Remote Controller | |
|---|---|---|
| Mode No. 8 | Mode No. 10 | |
| 0.3 in. WG (75 Pa) | 1 | 2 |
| 0.5 in. WG (125 Pa) | 2 | 2 |
| 0.6 in. WG (200 Pa) | 3 | 2 |
PVA - Vertical, Horizontal Left & Right
| External Static Pressure | Setting No. Wired or RedLINK Remote Controller | |
|---|---|---|
| Mode No. 8 | Mode No. 10 | |
| 0.3 in. WG (75 Pa) | 1 | 1 |
| 0.5 in. WG (125 Pa) | 2 | 1 |
| 0.8 in. WG (200 Pa) | 3 | 1 |
PVA - Downflow
| External Static Pressure | Setting No. Wired or RedLINK Remote Controller | |
|---|---|---|
| Mode No. 8 | Mode No. 10 | |
| 0.3 in. WG (75 Pa) | 1 | 2 |
| 0.5 in. WG (125 Pa) | 2 | 2 |
| 0.8 in. WG (200 Pa)* | 3 | 2 |
*PVA-A42 in Downflow External Static pressure: 0.70.
* Regarding to down flow setting, please refer to down flow kit installation manual.
Vane Settings
Mode No. 11
| Setting No. | PLA-EA | SLZ-KF | PCA-KA |
|---|---|---|---|
| 1 | Downward setting (vanes angle setup 3) | Not setting | No vanes |
| 2 | Middle setting (vanes angle setup 1) | Draft less (vanes angle setup 1) | (Vanes angle setup 1) |
| 3 | Draft less (vanes angle setup 2) | Downward setting (vanes angle setup 2) | (Vanes angle setup 2) |
Performing a System Test
You can test the system setup in ADVANCED MENU under SYSTEM TEST option.
1. Press and hold Menu on the controller for 5 seconds to access ADVANCED MENU options.
2. Touch ◀️ or ▶️ to go to SYSTEM TEST.
3. Touch Select or touch text area.
4. Touch ◀️ or ▶️ to select system test type. Touch Select or the touch text area.
5. For the Heat Test and Cool Test, use ◀️ or ▶️ to activate equipment.
ℹ️ Note: The clock is used as a timer while Heat or Cool is running. The Heat and Cool indicators are displayed when the system test is running.
kumo cloud®
Connecting to the kumo cloud®: The Wireless Interface 2 or later must be installed and configured with the kumo cloud app before continuing with the startup of the MHK2.
Automatic Setting of Time Provided by the Wireless Interface
When a Wireless Interface is present, the MHK2 Controller will operate using the time and date the Wireless Interface receives from the Internet. In the event of a system power outage, the MHK2 Controller's time and date setting will be independent until such time as the Wireless Interface regains an Internet connection. At that point, the MHK2 Controller will again match the Wireless Interface's Internet-acquired time and date.
Key Features
- System Status Information: Displays Cool On, Heat On, Standby status.
- Schedule Information: Follows time-based temperature control.
- Desired Temperature: Displays the current desired temperature setting.
- Indoor Temperature: Displays the current indoor temperature.
- Indoor Temperature Reminder: The indoor temperature display will show the temperature from the indoor unit, the MHK2 controller, indoor air sensor(s), or an average of all of them. This setting is confirmed and configured during installation setup.
- Vane: Touch to select air direction: Auto, Swing, Ceiling, High, Middle, Low, Floor.
- Mode: Select system Mode: Heat, Cool, Dry, Fan, Auto, Off.
- Lock: Indicates the screen is locked: Full Lock, Partial Lock, and ISU-based locks. Full and Partial Lock can be unlocked with a PIN.
The controller display shows:
- Time, ISU #, or Alert #: Current time, ISU number, or alert code.
- Following Schedule: Indicates the current schedule period (Wake, Leave, Return, Sleep).
- RedLINK™ Wireless Communication Status: Indicates if the controller is connected to the RedLINK™ interface and communicating correctly.
- Connection Status Information: Indicates if the MIFH2 RedLINK™ Wireless Receiver is connected to the Mitsubishi Electric Wireless Interface 2 and kumo cloud®.
- Messaging: Shows device setup options, menu options, reminders, schedule overrides.
- Schedule Period: Shows schedule period: Wake, Leave, Return, Sleep.
- Fan: Select Fan speeds: Auto, 1-5.
- Menu: Touch to display options. Start here to set a program schedule. ℹ️ Note: Long press the Menu button for 5 seconds to access Advanced Menu options.
ℹ️ Note: The screen wakes up by pressing the center area of the displayed temperature. The screen stays lit for 10 seconds.
RedLINK™ Error Codes
- 134: Weak signal. Move wireless device to a different location and try again.
- 137: Maximum number of clients reached.
- 153: Timeout.
ℹ️ Note: If any other error codes appear on the MRCH2 screen, please contact customer service.
Replacing System Components
ℹ️ Note: Only use Mitsubishi Electric components or other designated components for installation. Failure to comply may damage the product or cause a hazardous condition.
RedLINK™ Wireless Remote Controller
To replace a RedLINK™ Wireless Remote Controller, install batteries, affix to wall plate, and follow the procedures on page 6 to link it to the RedLINK™ network. If necessary, modify settings as needed (see tables on pages 10–11).
RedLINK™ Wireless Receiver
After installing a new RedLINK™ Wireless Receiver, you must unenroll the RedLINK™ Wireless Remote Controller so it can communicate with the new RedLINK™ Wireless Receiver, as described below.
There are three ways to unenroll the RedLINK™ Wireless Remote Controller from the old RedLINK™ Wireless Receiver:
- Press and hold the Menu button for 5 seconds to enter the Advanced Menu. Touch ◀️ or ▶️ to select UNENROLL DEVICE. Touch Select. Connect the new RedLINK™ Wireless Receiver.
- Enter the Advanced Menu. Touch ◀️ or ▶️ to select RESET. Touch Select. Touch ◀️ or ▶️ to select FACTORY. Touch Select. Touch Yes to confirm. Connect the new RedLINK™ Wireless Receiver.
- If the RedLINK™ Wireless Remote Controller is on the "Wait" screen, press and hold the bottom-center of the screen for 5 seconds. Connect the new RedLINK™ Wireless Receiver.
To remove all RedLINK™ devices:
- Press and hold the CONNECT button on the RedLINK™ Wireless Receiver for 10 seconds.
- To reconnect, see procedure on page 6.
Regulatory Information
FCC Compliance Statement (Part 15.19) (USA Only)
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation.
FCC Warning (Part 15.21) (USA Only)
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b)) (USA Only)
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Wireless Receiver and MHK2 Remote Control
To comply with FCC and Industry Canada RF exposure limits for general population/uncontrolled exposure, the antenna(s) used for these transmitters must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
Section 7.1.3 of RSS-GEN
Operation is subject to the following two conditions:
- This device may not cause interference, and
- This device must accept any interference, including interference that may cause undesired operation of the device.
Section 7.1.2 of RSS-GEN
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.
The operation of this equipment is subject to the following two conditions: (1) this equipment or device may not cause harmful interference, and (2) this equipment or device must accept any interference, including interference that may cause undesired operation.
Specifications
Operating Ambient Temperature
- Remote Controller: 32 to 120 °F (0 to 48.9 °C)
- Wireless Receiver: -40 to 165 °F (-40 to 73.9 °C)
Operating Relative Humidity
- Remote Controller: 5% to 90% (non-condensing)
- Wireless Receiver: 5% to 95% (non-condensing)
Physical Dimensions (Height, Width, Depth)
- Remote Controller: 4-5/64" x 4-5/64" x 1-1/16" (104 mm x 104 mm x 27 mm)
- Wireless Receiver: 3-3/32" x 1-3/4" x 39/64" (74.8 x 44.4 x 15.4 mm)
ADA Compliance
Please consult chapter 3 section 309 of the United Sates Access Board.
kumo cloud is a registered trademark of Mitsubishi Electric US, Inc. All other product names mentioned herein are trademarks or registered trademarks of their respective owners. U.S. Registered Trademark.
© 2019 Mitsubishi Electric US, Inc. Suwanee, GA 30024
Mitsubishi Electric Trane Heating and Air Conditioning
