Legrand MRHC3 - Manual (Page 4)

Status LED Indicator
The LED can display one of three colors: green, yellow
(amber, a combination of red and green), or red. The color
can be constant, or can flash at one of three rates to further
distinguish reported conditions.
To determine the flash rate, count the
number of flashes in 5 seconds:
5 flashes .......................................................................1 Hz
10 flashes......................................................................2 Hz
15 flashes......................................................................3 Hz
MRHC3/MRRC3 LED Indications are as follows:
Color Behavior Meaning
none Off Device is not powered.
Green On, not flashing Device is powered, has a house ID, oper-
ating normally.
Green Flashing @ 2 Hz Device transmitted a message on the
wireless network.
Yellow On, not flashing Device does not have a house ID.
Yellow Flashing @ 2 Hz Device is part of a binding process. Bind-
ing was started by some other device.
Yellow Flashing @ 3 Hz Device is the master of a binding process.
Binding was started on this device and
must be stopped on this device.
Red Flashing @ 2 Hz Device has encountered an error. An in-
valid command was attempted. If MRRC3
and it flashes after button press or input
change of state, the unit needs to be
bound to a room.
SET HOuSE ID
All wireless devices installed in the same system must
acquire the same unique House ID before use. This process
is known as house binding. Each wireless device is bound
to all other wireless devices in the house. If you are not
familiar with the binding processes for the wireless devices
in your installation, please review the Installation Guide, or
individual installation instructions provided with the devices.
The House ID binding serves two functions. First, it gives
the Scene Interface the same House ID as the rest of
the wireless network, second, it defaults the interface to
operating Mode-A.
1. Make sure all devices are installed and energized and
all group, house, and room bindings are complete.
Make sure that every other wireless device LED is
green and the MRHC3/MRRC3 is yellow (amber).
2. Press on any previously bound device until its LED
flashes amber (about 2 seconds).
3. Verify that the LED on the MRHC3/MRRC3 starts
flashing green. This sets the House ID to match the
other devices in the house, and sets the interface for
operating Mode-A.
4. Return to the same previously bound device used
in step 2 and press until its LED changes to solid
green (about 2 seconds). All device LEDs including the
MRHC3/MRRC3 should now be solid green.
To change to Mode-B, see Switching Operating Modes.
Scene Binding
Bind other wireless devices in the system to appropriate
groups and rooms before you attempt to execute scenes
from the Scene Interface. The Scene Interface can not be
used to set up or record scenes. Use an appropriate scene
controller, scene remote or a MR232 and a PC running a
terminal emulator to set up and record scenes.
Switching Operating Modes
You can change the operating mode selection at any time.
1. Press both buttons on the MRHC3/MRRC3
simultaneously ( ) until the LED starts flashing (about
2 seconds).
• To configure for Mode-A press and hold the top button
( ) until the LED flashes RED.
• To configure for Mode-B press and hold the bottom
button ( ) until the LED flashes GREEN.
2. Press both buttons on the MRHC3/MRRC3
simultaneously ( ) again until the LED stops flashing
and changes to solid green (about 2 seconds).
MRHC3 - HOuSE OPERATING MODE-A
For Mode-A, inputs 1 & 2 execute their scene on the rising
edge only. No scene executes on the falling edge. Mode-
A is primarily intended for momentary control signals,
however, some maintained applications can use this feature
to provide either an Auto-On, Manual-OFF or Manual-On,
Auto-OFF control configuration.
Input 3 is intended for maintained input signals to execute a
House-ON scene on the rising edge and a House-OFF scene
on the falling edge, as outlined in Table 1 below.
Table 1: Default House Mode-A
INPUT State Function
1 High House Scene 6
Low None
2 High House Scene 8
Low None
3 High House On Scene
Low House Off Scene
MRHC3 - HOuSE OPERATING MODE-B
In Mode-B, inputs 1, 2, and 3 are applicable to maintained
inputs only since a scene is executed on both the rising and
falling edges.
Inputs 1 and 2 use fixed house scenes as shown in Table 2
below. The scene shown is executed on the rising (high) and
falling (low) edges.
Input 3 provides an Over-Ride to PANIC scene on the rising
edge and a Revert Over-Ride to return the house (exit
PANIC) to the previous state on the falling edge.
Table 2: House Mode-B
INPUT State Function
1 High House Scene 6
Low House Scene 7
2 High House Scene 8
Low House Scene 9
3 High Over-Ride to Panic
Low Revert Over-Ride (Panic Off)