Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

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[
II
Restrictions ]
- 19 - HWE09080 GB
2) Remote controller wiring
*1 MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and
wireless remote controller.
*2 M-NET remote controller refers to ME remote controller and ME simple remote controller.
*3 The use of cables that are smaller than 0.75mm
2
[AWG18] is recommended for easy handling.
*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.
[3] Switch Settings and Address Settings
1. Switch setting
Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System
to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work.
Set the switches while the power is turned off.
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.
*1. Applicable when LOSSNAY units are connected to the indoor-heat source transmission line.
*2. The heat source units in the same refrigerant circuit are automatically designated as OC and OS 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 heat source units in the same refrigerant circuit.
MA remote controller
*1
M-NET remote controller
*2
Cable type
Type VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT Shielded cable MVVS
Number of
cores
2-core cable 2-core cable
Cable size
0.3 to 1.25mm
2 *3
[AWG22 to 16]
(0.75 to 1.25mm
2
)
*4
[AWG18 to 16]
0.3 to 1.25mm
2 *3
[AWG22 to 16]
(0.75 to 1.25mm
2
)
*4
[AWG18 to 16]
Maximum overall line
length
200 m [656ft] max.
The section of the cable that exceeds 10m
[32ft] must be included in the maximum in-
door-heat source transmission line distance.
Units on which to set the switches Symbol Units to which the power must be shut off
CITY MULTI indoor unit Main/sub unit IC Heat source units
*3
and Indoor units
LOSSNAY, OA processing unit
*1
LC Heat source units
*3
and LOSSNAY
M-NET remote controller Main/sub remote
controller RC Heat source units
*3
MA remote controller Main/sub remote
controller MA Indoor units
CITY MULTI heat source unit
*2
OC,OS Heat source units
*3
BC controller Main BC Heat source units
*3
and BC controller
Sub1, 2 BS1, BS2 Heat source units
*3
and BC controller