DIP / Rotary Switch Settings (Only)

Applicable documentation set: AO90TPCMF, AO72TPCMF, AO90EPCMF, AO72EPCMF (and associated indoor units / wired simple remote controller where used).
This HTML intentionally contains no tables and presents each setting as user-friendly text.

FUNCTION AND SETTING OF EACH SWITCH ADDRESS SETTING TEST RUN OUTDOOR UNIT OPERATION CONTROL

FUNCTION AND SETTING OF EACH SWITCH

Outdoor Unit – DIP Switches (Outdoor Unit PCB)

SW1 – Service / Forced Operations
  • SW1-1: Cooling test run — OFF = Release, ON = Operate.
  • SW1-2: Heating test run — OFF = Release, ON = Operate.
  • SW1-3: Pump down — OFF = Release, ON = Operate.
  • SW1-4: Forced defrost — OFF = Release, ON = Operate.

Operational constraint: Forced operations typically require the switch to remain ON continuously for at least 30 seconds after toggling.

SW2 – Environmental / Sequence Options
  • SW2-1: Silent operation — OFF = Release, ON = Operate.
  • SW2-2: Snow switch — OFF = Release, ON = Operate.
  • SW2-3 and SW2-4: Sequential start / start timing shift.
    • SW2-3 OFF and SW2-4 OFF → Shift time 0 seconds.
    • SW2-3 ON and SW2-4 OFF → Shift time 4 seconds.
    • SW2-3 OFF and SW2-4 ON → Shift time 8 seconds.
    • SW2-3 ON and SW2-4 ON → Shift time 12 seconds.
SW3 / SW4 – Not Used (Forbidden)
  • SW3-1, SW3-2, SW3-3, SW3-4: Setting forbidden.
  • SW4-1, SW4-2, SW4-3, SW4-4: Setting forbidden.
SW5 – Capacity Shift
  • SW5-1: OFF = 100%, ON = 93% capacity shift.
  • SW5-2, SW5-3, SW5-4: Setting forbidden.
SW6 – Piping Length and Defrost Capacity
  • SW6-1 and SW6-2: Applicable piping length selection:
    • SW6-1 OFF + SW6-2 OFF → Standard (Pipe length ≤ 40 m).
    • SW6-1 ON + SW6-2 OFF → Short (40 m < Pipe length ≤ 60 m).
    • SW6-1 OFF + SW6-2 ON → Medium (60 m < Pipe length ≤ 80 m).
    • SW6-1 ON + SW6-2 ON → Long (80 m < Pipe length ≤ 100 m).
  • SW6-3: Defrost capacity selection — OFF = Standard, ON = Large.
  • SW6-4: Setting forbidden.
SW7 – Outdoor Unit System Type, Refrigerant Type, Model Code
  • SW7-1 and SW7-2: Outdoor unit system type selection:
    • SW7-1 OFF + SW7-2 OFF → Heat pump (factory setting).
    • SW7-1 ON + SW7-2 ON → Cooling only.
    • Any other combination: Forbidden.
  • SW7-3: Refrigerant type — OFF = R22, ON = R407C.
  • SW7-4: Model code — OFF = 90, ON = 72.

This switch bank is typically factory-configured; adjust only where the service procedure explicitly requires it.

SW8 / SW9 – Refrigerant Circuit Address (Outdoor Unit Rotary Switches)
  • Rotary SW9: Refrigerant circuit address (first digit / high nibble).
  • Rotary SW8: Refrigerant circuit address (second digit / low nibble).
Address Calculation (No Table Required)

Treat the rotary switch positions as hexadecimal digits: 0–9 represent 0–9, and A–F represent 10–15. The refrigerant circuit address (decimal) is calculated as:

Refrigerant circuit address = (SW9 × 16) + SW8

Valid address range is 0 to 99. Any SW9/SW8 combination that produces a value outside 0–99 must not be used.

Example: SW9 = 1 and SW8 = E (14) ⇒ (1 × 16) + 14 = 30.

Indoor Unit – DIP Switches (Indoor Unit PCB, General Indoor Units)

DIP SW1 – Room Temperature Correction (Heating) and Forbidden Settings
  • SW1-1: Setting forbidden.
  • SW1-2: Setting forbidden.
  • SW1-3 and SW1-4: Heating room temperature correction selection:
    • SW1-3 OFF + SW1-4 OFF → Standard (factory setting).
    • SW1-3 ON + SW1-4 OFF → Increase +1 °C.
    • SW1-3 OFF + SW1-4 ON → Increase +2 °C.
    • SW1-3 ON + SW1-4 ON → Increase +3 °C.
DIP SW2 – Room Temperature Correction (Cooling), Filter Reset, Auto Restart
  • SW2-1: Cooling room temperature correction:
    • OFF → Standard (factory setting).
    • ON → Decrease −1 °C.
  • SW2-2: Setting forbidden.
  • SW2-3: Filter reset selection:
    • OFF → Filter sign resets after 200 hours (factory setting).
    • ON → Filter sign resets after 1000 hours.
  • SW2-4: Auto restart validity:
    • OFF → Invalid (factory setting).
    • ON → Valid.

Indoor Unit – DIP Switches (Compact Wall Mounted Type Indoor Unit)

Model Code Setting Switch
  • Model code information is configured using the dedicated model code setting switch on the indoor unit PCB (as provided for the relevant indoor unit model family).
SW1 – Fan Speed Setting (Compact Wall Mounted Type)
  • SW1-1 and SW1-2 define fan speed selection (factory-configured per indoor unit model code group).
  • SW1-3 and SW1-4 define fan speed selection (factory-configured per indoor unit model code group).

Where the indoor unit family uses model code groups (for example, “AS7”, “AS9”, “AS12”, “AS14”), the correct fan speed setting is selected to match that group.

SW2 – Auto Restart (Compact Wall Mounted Type)
  • SW2-1: Setting forbidden (must remain as specified by the PCB marking).
  • SW2-2: Setting forbidden (must remain as specified by the PCB marking).
  • SW2-3: Auto restart validity:
    • OFF → Invalid (factory setting).
    • ON → Valid.
  • SW2-4: Setting forbidden.
SW3 + Rotary SW5 – Refrigerant Circuit Address (Compact Wall Mounted Type)

This indoor unit type sets refrigerant circuit address (0–99) by combining SW3-1, SW3-2, SW3-3 (as the high portion) with Rotary SW5 (as the low portion).

Address Calculation (No Table Required)

Treat the rotary switch position as a hexadecimal digit: 0–9 represent 0–9, and A–F represent 10–15.

Compute the “high value” from SW3 as follows (OFF = 0, ON = 1):

High value = (SW3-1 × 1) + (SW3-2 × 2) + (SW3-3 × 4)

Then calculate:

Refrigerant circuit address = (High value × 16) + (Rotary SW5 value)

Valid address range is 0 to 99. If High value = 6, Rotary SW5 must be limited to 0–3 to remain within 96–99. Any setting that yields > 99 must not be used.

  • SW3-4: Setting forbidden (must remain OFF as specified).

Wired, Simple Remote Controller – DIP Switches

Remote Controller SW1 – DIP Switch No.1 to No.4
  • Dual remote controller setting (DIP No.1 and DIP No.2)
    • 1 remote controller (Normal): Master remote controller → DIP No.1 = ON, DIP No.2 = OFF.
    • 2 remote controllers (Dual):
      • Master remote controller → DIP No.1 = OFF, DIP No.2 = OFF.
      • Slave remote controller → DIP No.1 = ON, DIP No.2 = ON.
  • Group control setting / number of indoor unit connection (DIP No.3)
    • DIP No.3 = OFF → One indoor unit connection (factory setting).
    • DIP No.3 = ON → Multiple indoor unit connection.
  • Model setting (DIP No.4)
    • DIP No.4 = OFF → Heat pump model or heat recovery model (factory setting).
    • DIP No.4 = ON → Cooling only model.

ADDRESS SETTING

Kinds of Address and Setting Range (System Overview)
  • Refrigerant circuit address: 0 to 99 (set on both indoor and outdoor units for each refrigerant system).
  • Indoor unit address: 0 to 15.
  • Remote controller address: set in the order 0, 1, 2, 3 (blank is not allowed).
  • Central remote controller address: 0 to 15 (where applicable).

Where a “forbidden” switch is identified, it must not be altered from the specified state.

Indoor Unit PCB – Rotary Address Switches (General Indoor Units)
  • Indoor unit address: set using the indoor unit address rotary switch (range 0–15).
  • Refrigerant circuit address: set using indoor unit rotary switches for refrigerant circuit addressing (range 0–99). Apply the same hexadecimal-to-decimal method described for outdoor unit rotary SW8/SW9.
  • Remote controller address: set using the remote controller address rotary switch.
  • Termination / specific DIP requirements: where the indoor unit PCB specifies certain DIP positions as mandatory (for example, “Always set DIP SW 2-1 and 2-2 to OFF”), those must remain at the mandatory state.
Outdoor Unit PCB – Refrigerant Circuit Address (Rotary SW8 / SW9)
  • Use Rotary SW9 (high) and Rotary SW8 (low).
  • Calculate: address = (SW9 × 16) + SW8.
  • Confirm result is within 0–99 before energising the system.
Compact Wall Mounted Type – Refrigerant Circuit Address (DIP SW3 + Rotary SW5)
  • Calculate: High value = (SW3-1 × 1) + (SW3-2 × 2) + (SW3-3 × 4).
  • Calculate: address = (High value × 16) + (Rotary SW5 value).
  • Keep the final result within 0–99 (if High value = 6, Rotary SW5 must be 0–3).

TEST RUN

Outdoor Unit Test Run (via DIP SW1)
  • Cooling test run: set SW1-1 to ON to operate, OFF to release.
  • Heating test run: set SW1-2 to ON to operate, OFF to release.

Use only within the authorised service procedure and ensure the unit is returned to normal state after completion.

OUTDOOR UNIT OPERATION CONTROL

Silent Operation / Snow Operation / Sequential Start
  • Silent operation: SW2-1.
  • Snow switch: SW2-2.
  • Sequential start timing: SW2-3 and SW2-4 (0 / 4 / 8 / 12 seconds).
Capacity Shift and Defrost Capacity
  • Capacity shift: SW5-1 (100% or 93%).
  • Defrost capacity: SW6-3 (Standard or Large).
Piping Length Selection
  • Set SW6-1 and SW6-2 to match the installed piping length category (Standard / Short / Medium / Long) per the definitions listed under “SW6 – Piping Length and Defrost Capacity”.
System Type / Refrigerant Type / Model Code
  • System type selection: SW7-1 and SW7-2.
  • Refrigerant type: SW7-3 (R22 / R407C where applicable).
  • Model code: SW7-4 (90 / 72).

End of DIP / rotary switch settings content.