Mitsubishi Electric PAC-MK34BC, Technical & Service Manual

Page: 13 / 28

13
OCH744
6-3. TYPICAL CONTROL SYSTEM
TB7
TB3
(51)
L
5
L
1
OC
TB7
(53)
OC
24 VDC
L
6
L
7
M1 M2 S M1 M2 S
S M1 M2 S
TB3
M1 M2 S
M1 M2 S
M1 M2
TB3A
A-IC
(01)
A-IC
(02)
A-IC
(03)
A-IC
(04)
A-IC
MA-RC
MA-RC
MA-RC
MA-RC
WL-RC
WL-RC
WL-RC
WL-RC
(05)
A-IC
(06)
A-IC
(07)
A-IC
(08)
S1
S2
S3
TB
S1
S2
TB5/TB15
1
2 A
B
A
B
A
B
A
B
TB5/TB15
1
2
TB5/TB15
1
2
TB5/TB15
1
2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB
S1
S2
S3
TB3B
S1
S2
S3
TB3C
S1
S2
S3
TB3D
S1
S2
S3
TB3E
S1
S2
S3
TB3A
S1
S2
S3
TB3B
S1
S2
S3
TB3C
S1
S2
S3
M1
M2
S
TB5
M1
M2
S
TB5
L
2
A
A
A
M-IC
(09)
M-IC
(10)
MA-RC
MA-RC
TB5
M1
M2
TB15
1
2 A
B
A
B
TB15
1
2
S
TB5
M1
M2
S
L
3
L
4
Power
Supply
Unit
System
controller
Branch Box
Branch Box
A
: Shielded wire
( ): Address example
Note: M-NET remote controller cannot be connected with a refrigerant system which includes branch box.
(1) Difference between display and operation
1
When operating the system using the system controller, details of those operations will not appear on the display of the
wireless remote controller.
2
The set temperature range is different in the wireless remote controller that comes with room air conditioner and the system
controller. The room air conditioner has a wider range. If the target temperature is set to below 17°C or less, or 30°C or
more by the wireless remote controller that comes with room air conditioner, the temperature displayed on the system
controller may be converted to their maximum/minimum set temperature. For instance, when HEAT operation at 16°C is set
at the room air conditioner, the system controller may display 17°C.
3
When DRY mode is set with the wireless remote controller, the room air conditioner automatically set the optimum target
temperature. The system controller will display the target temperature as a set temperature.
4
When DRY mode is set with the system controller, the room air conditioner performs DRY mode control operation according
to the temperature set with the system controller.
(2) Timer operation
1
Timer operation should be set using only 1 controller from the remote controller that comes with the room air conditioner,
the system controller or the MA remote controller. If more than 1 controller is used to set the timer at the same time, the
timer will not function properly.
2
When the timer is set with the wireless remote controller; the system controller will not show the timer display.
3
The timer set with the system controller will not be cancelled with the wireless remote controller.
(3) Manual operation prohibition
1
When the manual operation (ON/OFF, set temperature, or operation mode) is prohibited with the system controller, the
command to perform the prohibited operation will not be accepted from the wireless remote controller that comes with the
room air conditioner. The operation partially enabled by the system controller can be operated with the wireless remote
controller. Regardless of whether the operation is disabled or enabled, 3 short beeps will sound when the signal is sent
from the wireless remote controller.
(4) Trouble
1
If the MA remote controller or the system controller shows the abnormal indication, clear it by stopping the operation with
one of the following: the MA remote controller, the system controller, or the wireless remote controller.
(Abnormal indication of the air conditioner could be recovered automatically, but that of the MA remote controller or the
system controller cannot be recovered unless the operation is stopped.)
IMPORTANT:
Make sure that the current leakage breaker is one compatible with higher
harmonics.
Always use a current leakage breaker that is compatible with higher
harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of
inverter.
Longest length via outdoor units:
L1 + L2 + L3 + L4 + L5 +L6 + L7 500 m (1640 ft) (1.25 mm² or more)
Longest transmission cable length
L1 + L2 + L3 + L 4, L5 + L6, L 7 200 m (656 ft) (1.25 mm² or more)
OC: Outdoor unit
M-IC: M-NET Control indoor unit (CITY MULTI indoor unit)
A-IC: A-control indoor unit
MA-RC: MA Remote controller
WL-RC: Wireless Remote controller