OCH790 _87
Bit Function
Operation in each switch setting
Purpose
Additional information
ON
OFF
When to set
1
Select operating
system startup
With
centralized
controller
Without
centralized
controller
Before turning
the power ON
Turn ON when the centralized
controller is connected to the
outdoor unit.
•
SW2-1 must be turned ON if a centralized control-
ler is connected to the system. An example of this
would be a TC-24, EB50A, AG150, AE50 or
AE200. If SW2-1 is OFF, while using a centralized
controller, in rare circumstances problems may be
encountered such as indoor units not responding
to group commands.
•
Group setting of 2 or more A-IC units which are
connected to branch box via centralized controller
is not allowed.
2
Clear connection
information
Activated Deactivated Before turning
the power ON
To clear connection informa
-
tion.
•
Clear connection information when relocating units
or connecting additional units.
3
Clear error history
Activated Deactivated OFF to ON
under suspen
-
sion after the
power is turned
on.
To clear error history.
-
4
Pump down
Activated Deactivated While the
compressor is
running
To facilitate outdoor unit the
pumping down operation.
Frequency = Fixed to 65 Hz
Indoor-linear expansion valve
= Fully open
Outdoor fan step = Fixed to 10
Refer to a section referring to the pumping down on
outdoor units Installation Manuals. It might not be
possible to collect all the refrigerant if the amount is
excessive.
Do not perform pump down work when there is a gas
leak. The intake of air or other gases causes
abnormally high pressure in the refrigeration cycle,
which may cause explosion or injury.
5
-
-
-
-
-
-
6
-
-
-
-
-
-
■
SW3: Trial operation
Initial setting
1
ON
OFF
2
The black square (■) indicates a switch position.
Bit Function
Operation in each switch setting
ON
OFF
When to set
1
ON/OFF from outdoor
unit
*1
Activated Deactivated
Any time after the power
is turned ON.
2
Mode setting
Heating
Cooling
*1. Test run on PWFY series cannot be run by the outdoor unit. Use a switch on the indoor unit or a remote controller to
perform test run.
■
SW4/SW8: Model switch
Model selection
MODEL
SW4
SW8
SW9
MODEL
SW4
SW8
SW9
PUMY-P112VKM6
PUMY-P125VKM6
PUMY-P140VKM6
PUMY-P112YKM5
PUMY-P125YKM5
PUMY-P140YKM5
The black square (■) indicates a switch position.
Bit When to set
1-6 Before the power is turned ON.
■
SW5: Function switch
Initial setting
1
ON
OFF
2 3 4 5 6 7 8
The black square (■) indicates a switch position.
Bit Function
Operation in each switch setting
Purpose
Additional information
ON
OFF
When to set
1
Demand control setting
for Australia
*2
Activated Deactivated
Any time
Turn ON to activate the demand control for
Australia.
(Do not turn this ON if the unit is in
outside Australia)
2
Change the indoor
unit’s LEV opening at
startup
Activated Deactivated
Any time
To set the LEV opening at startup higher
than usual (+150 pulses). To improve the
operation with the LEV almost clogged.
The refrigerant flow noise at startup
become louder.
3
-
-
-
-
-
-
4
-
-
-
-
-
-
5
Change the indoor
unit’s LEV opening at
defrost
Activated Deactivated
Any time
To set the LEV opening higher than usual
during defrosting operation. (Only Qj ≤ 10
is valid, + 300 pulses) To avoid the
discharge temperature increase and
provide efficient defrosting operation.
The refrigerant flow noise during the
defrosting operation become louder.
6
Decreasing the target
sub cool (Heating
mode)
Activated Deactivated
Any time
To reduce the discharge temperature
decrease due to refrigerant liquid accumu
-
lation in the units.
A refrigerant flow noise might be generat-
ed if the sub cool value is too small.
