2
5. Dip Switch setting
5.1 Dip Switch Functions
Located on the FTC4 printed circuit board are 4 sets of small white switches known
as Dip switches. The Dip switch number is printed on the circuit board next to
the relevant switches. The word ON is printed on the circuit board and on the Dip
switch block itself. To move the switch you will need to use a pin or the corner of a
thin metal ruler or similar.
Dip switch settings are listed below.
Make sure to turn off both indoor unit and outdoor unit power supplies before
changing the switch settings.
For multiple outdoor units control with FTC4 (Slave), see section 9.
Dip switch
Function
OFF
ON
Default settings:
Indoor unit model
SW1 SW1-1 Boiler
WITHOUT Boiler
WITH Boiler
OFF
SW1-2 Heat pump maximum outlet water temperature
55ºC
60ºC
ON *1
SW1-3 DHW tank
WITHOUT DHW tank
WITH DHW tank
OFF: PAC-IF051B-E
PAC-SIF051B-E
ON: PAC-IF052B-E
SW1-4 Immersion heater
WITHOUT Immersion heater
WITH Immersion heater
OFF: PAC-IF051B-E
PAC-SIF051B-E
ON: PAC-IF052B-E
SW1-5 Booster heater
WITHOUT Booster heater
WITH Booster heater
ON
SW1-6 Booster heater function
For heating only
For heating and DHW
ON
SW1-7 Outdoor unit type
Split type
Packaged type
OFF: PAC-IF051B-E
PAC-SIF051B-E
ON: PAC-IF052B-E
SW1-8 Wireless remote controller
WITHOUT Wireless remote controller WITH Wireless remote controller
OFF
SW2
SW2-1 Room thermostat1 input (IN1) logic change
Zone1 operation stop at thermostat
short
Zone1 operation stop at thermostat
open
OFF
SW2-2 Flow switch1 input (IN2) logic change
Failure detection at short
Failure detection at open
ON
SW2-3 Booster heater capacity restriction
Inactive
Active
OFF
SW2-4 Cooling mode function
Inactive
Active
OFF
SW2-5
Automatic switch to backup heat source operation
(When outdoor unit stops by error)
Inactive
Active *2
OFF
SW2-6 Mixing tank
WITHOUT Mixing tank
WITH Mixing tank
OFF
SW2-7 2-zone temperature control
Inactive
Active
OFF
SW2-8
—
—
-
OFF
SW3
SW3-1 Room thermostat 2 input (IN6) logic change
Zone2 operation stop at thermostat
short
Zone2 operation stop at thermostat
open
OFF
SW3-2 Flow switch 2 input (IN3) logic change
Failure detection at short
Failure detection at open
OFF
SW3-3 Flow switch 3 input (IN7) logic change
Failure detection at short
Failure detection at open
OFF
SW3-4 Cooling operation in Zone2
Not in use
In use
OFF
SW3-5 Heating mode function *3
Inactive
Active
OFF
SW3-6
—
—
—
OFF
SW3-7
—
—
—
OFF
SW3-8
—
—
—
OFF
SW4
SW4-1 Multiple outdoor units control
Inactive
Active
OFF: PAC-IF051B-E
PAC-IF052B-E
ON : PAC-SIF051B-E
SW4-2 Position of multiple outdoor units control *4
Slave
Master
OFF
SW4-3
—
—
—
OFF
SW4-4
—
—
—
OFF
SW4-5 Emergency mode (Heater only operation)
Normal
"Emergency mode (Heater only operation)
(To be activated only when powered ON)"
OFF *5
SW4-6 Emergency mode (Boiler operation)
Normal
"Emergency mode (Boiler operation)
(To be activated only when powered ON)"
OFF *5
Note:
1. When the FTC4 is connected with a PUHZ-RP outdoor unit of which maximum outlet water temperature is 55ºC, Dip SW1-2 must be changed to OFF.
2. OUT11 will be available. For safety reasons, this function is not available for certain errors. (In that case, system operation must be stopped and
only the water circulation pump keeps running.)
3 This switch functions only when the FTC4 is connected with a PUHZ-FRP outdoor unit. When another type of outdoor unit is connected, the heating
mode function is active regardless of the fact that this switch is ON or OFF.
4. SW4-2 is available only when SW4-1 is ON.
5. If emergency mode is no longer required, return the switch to OFF position.
SW1
SW4
SW2
SW3
OFF: PAC-IF051B-E
PAC-SIF051B-E
ON: PAC-IF052B-E
