Mitsubishi Electric City Multi PUHY-HP144TSHMU-A, Service Handbook

Page: 64 / 265

[
IV
Remote Controller ]
- 55 - HWE0716A GB
IV
Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers
There are two types of remote controllers: M-NET (ME) remote controller, which is connected on the indoor-outdoor
transmission line, and MA remote controller, which is connected to each indoor unit.
1. Comparison of functions and specifications between MA and ME remote controllers
2. Remote controller selection criteria
MA remote controller and M-NET remote controller have different functions and characteristics. Choose the one that better
suits the requirements of a given system. Use the following criteria as a reference.
Functions/specifications MA remote controller
*1*2
*1. MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and wire-
less remote controller.
*2. Either the MA remote controller or the M-NET remote controller can be connected when a group operation of units in a
system with multiple outdoor units is conducted or when a system controller is connected.
M-NET (ME) remote controller
*2*3
*3. M-NET remote controller refers to ME remote controller and ME simple remote controller.
Remote controller address settings Not required Required
Indoor/outdoor unit address set-
tings Not required (required only by a system
with one outdoor unit)
*4
*4. Depending on the system configuration, some systems with one outdoor unit may require address settings.
Required
Wiring method Non-polarized 2-core cable
To perform a group operation, daisy-
chain the indoor units using non-polar-
ized 2-core cables.
Non-polarized 2-core cable
Remote controller connection Connectable to any indoor unit in the
group Connectable anywhere on the indoor-out-
door transmission line
Interlock with the ventilation unit Each indoor unit can individually be in-
terlocked with a ventilation unit. (Set up
via remote controller in the group.) Each indoor unit can individually be inter-
locked with a ventilation unit. (Set up via
remote controller.)
Changes to be made upon group-
ing change MA remote controller wiring between in-
door units requires rewiring. Either the indoor unit address and remote
controller address must both be changed,
or the registration information must be
changed via MELANS.
MA remote controller
*1*2
M-NET (ME) remote controller
*1*2
ΠThere is little likelihood of system expansion and group-
ing changes.
ΠGrouping (floor plan) has been set at the time of instal-
lation.
ΠThere is a likelihood of centralized installation of remote
controllers, system expansion, and grouping changes.
ΠGrouping (floor plan) has not been set at the time of in-
stallation.
ΠTo connect the remote controller directly to the OA pro-
cessing unit.
*1. M-NET remote controller and MA remote controller cannot both be connected to the same group of indoor units.
*2. A system controller must be connected to a system to which both MA remote controller and M-NET remote controller are
connected.
<System with MA remote controller> <System with M-NET remote controllers>
MA remote controller
Outdoor unit
Indoor unit
M-NET transmission line
(indoor/outdoor transmission line)
group group
M-NET remote controller
Outdoor unit
Indoor unit
M-NET transmission line
(indoor/outdoor transmission line)
group group