MXS Service Manual

Field Settings SiUS121736EA
231 Trial Operation and Field Settings
5.1.2 COOL/HEAT Mode Lock
Use the S15 connector to set the unit to cooling only or heating only.
Setting to heating only (H): short-circuit the pins 1 and 3 of the connector S15.
Setting to cooling only (C): short-circuit the pins 3 and 5 of the connector S15.
The following specifications apply to the connector housing and pins.
 JST products:
Housing: VHR-5N
Pin: SVH-21T-1, 1
Note that forced operation is also possible in cooling/heating mode.
5.1.3 NIGHT QUIET Mode
Outline If NIGHT QUIET mode is to be used, initial settings must be made when the unit is installed.
Explain the function of NIGHT QUIET mode, as described below, to the customer, and confirm
whether or not the customer wants to use NIGHT QUIET mode.
NIGHT QUIET mode function reduces operating noise of the outdoor unit at nighttime. This function
is useful if the customer is worried about the effects of the operating noise on the neighbors.
However, if NIGHT QUIET mode is running, cooling capacity is reduced.
Procedure Turn on the SW6-1 on the service monitor PCB of the outdoor unit.
COOL mode (C)
HEAT mode (H)
13
S15
5
(R22007)
Service monitor PCB
HEAT
COOL
4
3
2
1
2
1
E
D
C
B
A
2
1
ON OFF
COOL
4
3
2
1
2
1
E
D
C
B
A
Screw
Remove
the switch
cover.
Night Quiet mode
setting switch
(SW6-1)
(R22008)