Mitsubishi Electric PAC-IF051B-E Installation Manual page 29

5. Dip Switch setting
5.4 Operation setting
Set Dip SW 1-8 to set whether the system has a wireless remote controller.
Dip SW 1- Setting
OFF WITHOUT wireless remote controller
ON WITH wireless remote controller
Set Dip SW 2-1 to set the room thermostat 1 input (IN1) logic.
Dip SW 2-1 Setting
OFF Operation stop at thermostat short
ON Operation stop at thermostat open
Set Dip SW 2-2 to set the flow switch 1 input (IN2) logic.
Dip SW 2-2 Setting
OFF Failure detection at short
ON Failure detection at open
Set Dip SW 2-3 to set the restriction on the capacity of booster heater.
Dip SW 2-3 Setting
OFF Inactive
ON Active
When Dip SW 2-3 is ON, booster heater 2 and 2+ operation is not available. (Only booster heater 1 is available)
Notes: 1 When installing one booster heater, use OUT6 (Booster Heater 1) and switch SW2-3 to ON.
2 When installing two booster heaters, use OUT6 (Booster Heater 1) and OUT7 (Booster heater 2). In such cases, use OUT7 (Booster heater 2) to connect the one
with higher capacity. Or, make the sum of the capacities of OUT7 (Booster heater 2) and OUT8 (Booster 2+) greater than the capacity of OUT6 (Booster 1).
Reference: Summary of Booster heater control
The booster heater is controlled in the following three steps.
Booster heater 1
OFF
STEP 1
ON STEP 2
STEP 3
Set Dip SW 2-4 to set activate or deactivate cooling mode.
Dip SW 2-4 Setting
OFF Inactive
ON Active
When Dip SW 2-4 is OFF, cooling mode is not available.
Set Dip SW 2-5 to set the automatic switch to backup heater only operation. (When outdoor unit stops by error.)
Dip SW 2-5 Setting
OFF Inactive
ON Active
Set Dip SW 3-1 to set the room thermostat 2 input (IN6) logic.
Dip SW 3-1 Setting
OFF Operation stop at thermostat short
ON Operation stop at thermostat open
Set Dip SW 3-2 to set the flow switch 2 input (IN3) logic.
Dip SW 3-2 Setting
OFF Operation stop at thermostat short
ON Operation stop at thermostat open
Set Dip SW 3-3 to set the flow switch 3 input (IN7) logic.
Dip SW 3-3 Setting
OFF Operation stop at thermostat short
ON Operation stop at thermostat open
Set Dip SW3-4 whether to make cooling operation in Zone 2 available.
Dip SW 3-4 Setting
OFF Not in use
ON In use
When Dip SW3-4 is set to OFF, cooling operation in Zone 2 is not available.
Set Dip SW 3-5 to set activate or deactivate heating mode.
Dip SW 3-5 Setting
OFF Inactive
ON Active
When the connected outdoor unit is not of PUHZ-FRP model, heating mode is always active regardless of Dip SW3-5 setting.
Booster heater 2
(OUT6) (OUT7)
OFF OFF
ON OFF
OFF ON
ON ON
Booster heater 2+
(OUT8)
OFF
Controlled to this extent when SW2-3 is ON.
OFF
ON
ON
Output synchronised with Booster heater 2
2