Function Settings List – VRF Outdoor Unit Series

Applicable Models: VR-II, V-III, V-II, J-IIIL, J-III, J-IIS

Overview

This document provides a consolidated list of function settings available for outdoor units in the VRF series listed above.
Settings are configured via the outdoor unit printed circuit board (PCB) using switches SW107 – SW109 and the digital LED display (LED104, LED105).
Settings allow adjustment of system operation, energy management, and communication priorities depending on site requirements.

1. Accessing Function Settings Mode

Preparation

  1. Confirm that the outdoor unit is stopped before adjusting function settings.

  2. Turn on the power supply to the outdoor unit.

  3. Verify that LED105 (Operation) and LED104 (Error) indicators show normal status.

Entering Function Setting Mode

  1. Press the MODE/EXIT (SW107) button once.

  2. Use the SELECT (SW108) button until “F2” appears on LED104.

  3. Press the ENTER (SW109) button to access Function Setting Mode.

  4. Use SW108 to scroll through LED codes and SW109 to select and confirm.

  5. To exit, press MODE/EXIT (SW107) again.

Refer to the system’s Service Manual for model-specific LED code entry procedures.

2. Function Settings by Model Series

2.1 VR-II Series

Reference: Pages 4–8 of source document

VRF Outdoor Funtion settings D_…

Setting FunctionOptionsNotes
Pipe LengthStandard / Short / Medium / LongAdjust depending on installed piping distance.
Sequential Start ShiftNormal / 1 sec Delay / 2 sec DelayStaggers compressor starts.
Cooling/Heating Capacity ShiftNormal / Save Mode / High PowerAdjusts capacity performance.
Heating Capacity ShiftNormal / Save Mode / High PowerSame as above, heating only.
Switching Batch/Emergency StopBatch Stop / Emergency StopSelect external control type.
Snow Falling ProtectionEnable / DisablePrevents coil icing during snow conditions.
Energy Saving LevelLevel 1–4Controls system capacity for efficiency.
Low Noise ModeNormal / Low Noise 1 / Low Noise 2Reduces outdoor noise output.
Electricity Meter Address0001–9999Assigns Modbus or pulse meter ID.

2.2 V-III Series

Reference: Pages 9–13 of source document

VRF Outdoor Funtion settings D_…

Setting FunctionOptionsNotes
Pipe Length0–3 (up to 150m)Based on piping distance.
Sequential Start ShiftNormal / DelayStaggers compressor sequence.
Capacity ShiftNormal / Save Mode / High PowerAdjusts total output.
Operation PriorityIndoor / OutdoorDefines which command takes control.
Snow Protection ModeNormal / Enable / DisableEnables outdoor fan defrost control.
Low Noise OperationNormal / Low Noise 1 / Low Noise 2Used for noise-restricted sites.
Energy Saving ModeLevel 1–3Reduces load for energy optimization.
Height DifferenceStandard / HighUse when vertical distance between indoor and outdoor >10m.

2.3 V-II Series

Reference: Pages 14–17 of source document

VRF Outdoor Funtion settings D_…

Setting FunctionOptionsNotes
Pipe Length0–3Based on system layout.
Sequential Start ShiftNormal / DelayAvoids inrush current by staggering.
Cooling CapacityNormal / Save / High PowerControls cooling output.
Operation PriorityIndoor / OutdoorDetermines control source.
Snow Fan ModeStandard / Short / LongAdjust fan run time for coil defrost.
Static PressureStandard / HighAdjusts discharge fan curve for ducted applications.
Low Noise ModeNormal / Low NoiseReduces outdoor unit operation sound.
Energy SavingLevel 1–3Load reduction to optimize energy use.

2.4 J-IIIL, J-III, J-II Series

Reference: Pages 18–21 of source document

VRF Outdoor Funtion settings D_…

Setting FunctionOptionsNotes
Pipe LengthStandard / Short / Medium / LongFactory set to “Standard”.
Capacity ShiftNormal / Save / High PowerAdjusts total performance.
Operation PriorityFirst Command / IndoorControl logic selection.
Outdoor Unit Capacity SaveLevel 1–5Reduces compressor load for efficiency.
Low Noise OperationNormal / Low Noise 1Reduces sound by up to 5 dB(A).
Electricity MeterAddress 0001–9999Assigns monitoring address to CN135.
Demand Control KitPower Limit ValuesAvailable for J-IIIL only; used to cap current draw.

2.5 J-IIS Series

Reference: Pages 23–27 of source document

VRF Outdoor Funtion settings D_…

Setting FunctionOptionsNotes
Pipe Length0–3Based on actual piping distance.
Capacity ShiftNormal / Save / High PowerAdjusts unit performance.
Height DifferenceStandard / HighUsed when indoor and outdoor are on different levels.
Operation ModeBatch Stop / Emergency StopDefines external stop signal type.
Low NoiseNormal / Low NoiseReduces fan speed for acoustic compliance.
Capacity SaveLevel 1–3Reduces output for energy management.

3. Notes and Recommendations

  1. Slave Units
    Function settings must not be changed on outdoor units configured as Slave. Adjust settings only on the Master outdoor unit.

  2. System Power
    Always disconnect power before removing PCB covers or touching terminal connections.

  3. Commissioning
    After completing adjustments, record all function settings in the commissioning sheet for future reference.

  4. Electrical Metering
    When using an external energy meter connected to CN135, ensure correct pulse settings (factory default = x01).

Summary

SeriesKey Adjustable ParametersSpecial Notes
VR-IIPipe length, energy save, noise levelUp to 4-step energy saving
V-IIISnow protection, static pressureDesigned for large systems
V-IISequential start, capacity modeSupports 3-step energy save
J-IIIL / J-III / J-IIPower limit and low noiseJ-IIIL includes demand control kit support
J-IISPipe length, height differenceCompact VRF for small installations



Support

For configuration help: