Engineering Manual

External Heater Adapter CN24RELAY-KIT-CM3
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
- Return air temperature sensor fault (Error code: 5101)
- Indoor unit fan operation error (Error code: 4109)
- Transmission error (Error code: 6***, 7***)
- When heating mode is prohibited
- When demand control or capacity save is set to 0%
- During refrigerant recovery mode on PUMY system
- For a few minutes when change from thermo OFF to ON or ON to OFF in R2/WR2 system
Table.2
Note:
(1) On the ducted model units (except the Fresh air intake type), turning on the heater with the fan setting set to OFF requires that the DIP S/W
and connectors on the indoor units*1 are set on site.
*1: DIP SW3-4, CN24, and CN4Y (or CN22)
Table.3 Fan control in defrost
Table.4 Fan speed setting in defrost
<Image>
(2) On the Fresh air intake type units, the heater cannot be turned on when the fan setting set to OFF.
(3) Non-ducted models do not require the settings as described in Section (1) above.
● Reference (not applicable to the ducted models)
*1: Refer to Section 5 “Dipswitch Setting” for further information.
(4) Back-up heating will not operate when the heater turns on during demand control.
(5) This is applicable only to the R410A series. Make the sett
ings for the following dip swiches on the outdoor unit control board before turning
on the power.
Heater control #A
Heater OFF Inlet air temp. set
temp.
Heater ON Inlet air temp. < set temp. -4ºF (2ºC)
Heater control #B
Heater OFF Inlet air temp. set temp.
Heater ON Inlet air temp. < set temp. -1.8ºF (1ºC)
Note:
<For heater>
The value “4ºF (2ºC)” is modifiable from 1.8ºF (1ºC) to 9ºF (5ºC) by maintenance tool.
Pattern
Duct unit (PEFY-NMSU-E, PEFY-NMH(S)U-E, PEFY-NMAU-E, PFFY-NEMU-E, PFFY-NRMU-E, PVFY)
CN4Y or CN22 for FAN control (YU25) DIP S/W3-4 (Indoor unit) Fan speed in defrost (Heater)
1
Unplugged
)FFO retaeH(potSFFO
)NO retaeH(4.elbaT eeSNO2
3
Plugged
)FFO retaeH(potSFFO
)NO retaeH(potSNO4
SW3-1 SW1-7 SW1-8 Fan speed *1
*1: The fan operates at the same speed settings as
shown in this table during the Heating Thermo-OFF
mode.
*2: If Pattern 2 in the
table above is selected for fan
control, the fan will follow the remote controller set-
ting.
OFF OFF OFF Very low
woLF
FONOFFO
OFF OFF ON Remote controller setting
OFF ON ON Stop (Remote controller setting *2)
ON ON ON Stop (Remote controller setting *2)
Pattern
NON ducted unit (PLFY/PKFY/PCFY/PMFY)
CN4Y or CN22 for FAN control (YU25)*1 DIP S/W (Indoor unit) Fan in defrost
)NO retaeH( potSA/NA/N1
Set temp.
(Room temperature setting)
Set temp. -1.8ºF (1ºC)
Inlet air temp.
Heater output
ON
OFF
Set temp. -4ºF (2ºC)
The heater operation interlocks with the Thermo-ON/OFF mode on the
indoor units.
Set temp.
(Room temperature setting)
Set temp. -1.8ºF (1ºC)
Inlet air temp.
Heater output
ON
OFF
CN4Y or CN22
Indoor unit Control board
CN24
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