11
6
HEATER CONTROL
6-1. Control specifications and Function setting
Table 1 shows how the field-installed heater is controlled. Select the desired pattern in the table below, and set the
Function on the indoor units as shown in Table 1.
Table.1 [Function table]
Select unit numbers 01 to 03 or all units (AL[wired remote controller] / 07[IR wireless remote controller])
*Refer to the Installation Manual for function settings.
Mode
Setting
Mode no. Setting Initial setting
Heater control
23
1
23
2
-
Heater OFF
Inlet air temp. set temp.
Heater ON
Inlet air temp. < set temp.-4.5˚F(2.5˚C)
The fan will stop and the heater will turn off when
[DEFROST] or [ERROR] is displayed.
The fan will drive and the heater will turn on when
[DEFROST] or [ERROR] is displayed.
Set temp.
Set temp.-1.8
˚
F(1
˚C
)
Set temp.-4.5
˚
F(2.5
˚C
)
Inlet air temp.
Heater output
OFF
ON
Heater OFF
Inlet air temp. set temp.
Heater ON
Inlet air temp. < set temp.-1.8˚F(2.5˚C)
Set temp.
Set temp.-1.8
˚
F(2.5
˚C
)
Inlet air temp.
Heater output
OFF
ON
6-2. Fan control
*Refer to the Installation Manual for function settings.
By setting the Mode No. 23 in the Function Table in section 6-1 to 2 and using CN4Y on the optional parts PAC-YU25HT, the
following patterns of fan control will become possible when [DEFROST] or [ERROR] is displayed.
Fan control patterns when [DEFROST] or [ERROR] is displayed
*1 Fan speed setting
* If a heater is installed in the duct, do not use CN4Y. By doing so, the fan will turn off when the heater is on,
which may result in fire.
Heater is installed in the duct.
No heater is installed in the duct.
Use of CN4Y (PAC-YU25HT)
Heater is off.
Heater is on.
Unused*
Fan ON*1
Fan ON*1
Fan OFF
Fan OFF
Used
Setting
Mode no.
Setting
Mode
Fan control
Very low
Heating Thermo-OFF
[DEFROST] or [ERROR]
STOP
Remote controller setting
Remote controller setting
Remote controller setting
Very low
25
25
25
1
2
3
Initial setting
-
-
