Switch Settings - Mitsubishi PUHY-EP250 Service Handbook

[2-3 Switch Settings ]

2) Remote controller wiring
Type
Number of
cores
Cable type
Cable size
Maximum overall line
length
*1 MA remote controller refers to MA remote controller (PAR-31MAA, PAR-21MAA), MA simple remote controller, and
wireless remote controller.
*2 ME remote controller refers to ME remote controller and ME simple remote controller.
*3 The use of cables that are smaller than 0.75mm
*4 When connected to the terminal block on the Simple remote controller, use cables that meet the cable size specifi-
cations shown in the parenthesis.
*5 When connecting PAR-31MAA or MA Simple remote controller, use sheathed cables with a minimum thickness of
2
0.3 mm .
2-3

Switch Settings

1. Switch setting
The necessary switch settings depend on system configuration. Before performing wiring work, refer to the following page(s).
[2-7 Example System with an MA Remote Controller](page 30)
[2-8 Example System with an ME Remote Controller](page 40)
[2-9 Example System with an MA and an ME Remote Controller](page 42)
If the switch settings are changed while the unit is being powered, those changes will not take effect, and the unit will not
function properly.
Units on which to set the switches
CITY MULTI indoor unit
LOSSNAY, OA processing unit
ATW
Air handling kit
ME remote controller
MA remote controller
CITY MULTI outdoor unit
*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line.
*2. The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2 in the order of
capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).
*3. Turn off the power to all the outdoor units in the same refrigerant circuit.
*4. When a PAR-31MAA is connected to a group, no other MA remote controllers can be connected to the same group.
*5. When setting the switch SW4 of the control board, set it with the outdoor unit power on. Refer to the following page(s).
[5-1-1 Outdoor Unit Switch Functions and Factory Settings](page 77)
HWE12050
MA remote controller
CVV
2-core cable
2 *3 *5
0.3 to 1.25mm
[AWG22 to 16]
200 m [656ft] max.
Main/sub unit
*1
Booster Unit
Water Hex Unit
Main/sub remote
controller
*4
Main/sub remote
controller
*2
*1
CVV
2-core cable
0.3 to 1.25mm
[AWG22 to 16]
(0.75 to 1.25mm
[AWG18 to 16]
The section of the cable that exceeds 10m
[32ft] must be included in the maximum in-
door-outdoor transmission line distance.
2
(AWG18) is recommended for easy handling.
Symbol Units to which the power must be shut off
IC Outdoor units
LC Outdoor units
BU Outdoor units and Booster Unit
AU Outdoor units and Water Hex Unit
IC Outdoor units
unit
RC Outdoor units
MA Indoor units
OC,OS1,OS2 Outdoor units
- 19 -
*2
ME remote controller
2 *3
2 *4
)
*3
and Indoor units
*3
and LOSSNAY
*3
or field supplied air handling
*3
*3 *5
GB