MXS Service Manual

SiUS121736EA Field Settings
Trial Operation and Field Settings 230
5. Field Settings
5.1 Outdoor Unit
5.1.1 Priority Room Setting
Outline 1. Operation mode
The operation mode of the prioritized room takes precedence. For example, when the
prioritized indoor unit starts cooling operation, the other indoor units which have been in heating
operation enter the standby mode. Heating operation will resume if the prioritized indoor unit
stops cooling operation.
2. POWERFUL operation
The electronic expansion valves are controlled to provide more capacity to the prioritized room
and the capacities for the other indoor units will be slightly reduced.
3. OUTDOOR UNIT QUIET operation
When the OUTDOOR UNIT QUIET operation is selected in the prioritized room, the outdoor
unit runs quietly.
(Without priority room setting, OUTDOOR UNIT QUIET operation starts only when the function
is set for all the operating indoor units.)
Procedure 1. Turn the circuit breaker off before changing the setting.
2. Turn on the one of the switches of the SW4 on the service monitor PCB.
Only one room can be set as the priority room.
3. Turn the power on.
Service monitor PCB
HEAT
COOL
4
3
2
1
2
1
E
D
C
B
A
COOL
4
3
2
1
2
1
E
D
C
B
A
Screw
ON OFF
Priority room setting switch (SW4)
E
D
C
B
A
Remove
the switch
cover.
(R22006)