General Assist Technical Reference
VII Outdoor Unit Function Settings
F1 monitor mode and F2 field-setting reference
Use this reference when checking operating data or configuring supported field settings from the outdoor unit PCB. F1 is used to display monitor values. F2 is used for field settings.
Important: Change settings only when the applicable system design, installation requirements and service documentation confirm that a change is required. Record original settings before making any adjustment.
F1 — Monitor Mode
Push-switch monitor mode on the outdoor unit PCB displays system, component and refrigerant-cycle information using the following item codes.
| Classification | Item Code | Monitor Item | Displayed Information |
|---|---|---|---|
| Device and system | 00 | Connected number of indoor unit | Number of communicating indoor units |
| 01 | Software version of outdoor unit | Outdoor-unit software version | |
| 02 | Software version of INV PCB | INV PCB software version; displayed by five items | |
| 03 | Software version of communication PCB | Communication PCB software version | |
| Operation of each part | 10 | Rotational speed of outdoor unit fan motor | Fan speed [rpm] |
| 11 | Rotational speed of INV compressor | Compressor speed [rps] | |
| 12 | Current value of INV compressor | Current [A] | |
| 13 | Current value of CONST speed compressor | Current [A] | |
| 14 | Pulse of EEV1 | Pulse [pls] | |
| 15 | Pulse of EEV2 | Pulse [pls] | |
| Time guard | 20 | Accumulated current time | Accumulated current time [×10 hour] |
| 21 | INV compressor accumulated time — Cooling | Cooling accumulated operating time [×10 hour] | |
| 22 | INV compressor accumulated time — Heating | Heating accumulated operating time [×10 hour] | |
| 23 | CONST speed compressor accumulated time | Accumulated operating time [×10 hour] | |
| Refrigerant cycle data 1 | 30 | Thermistor 1 — INV compressor discharge temperature | Temperature [°C or °F] |
| 31 | Thermistor 2 — CONST speed compressor discharge temperature | Temperature [°C or °F] | |
| 32 | Thermistor 3 — Outdoor temperature | Temperature [°C or °F] | |
| 33 | Thermistor 4 — Suction temperature | Temperature [°C or °F] | |
| 34 | Thermistor 5 — Heat-exchanger temperature | Temperature [°C or °F] | |
| 35 | Thermistor 6 — Liquid temperature 1 | Temperature [°C or °F] | |
| 36 | Thermistor 7 — Liquid temperature 2 | Temperature [°C or °F] | |
| 37 | Thermistor 8 — Sub-cool heat-exchanger inlet temperature | Temperature [°C or °F] | |
| 38 | Thermistor 9 — Sub-cool heat-exchanger outlet temperature | Temperature [°C or °F] | |
| 39 | Thermistor 10 — INV compressor temperature | Temperature [°C or °F] | |
| Refrigerant cycle data 2 | 40 | Thermistor 11 — CONST speed compressor temperature | Temperature [°C or °F] |
| Refrigerant cycle data 3 | 50 | Pressure sensor 1 — High pressure sensor | Pressure [MPa or psi] |
| 51 | Pressure sensor 2 — Low pressure sensor | Pressure [MPa or psi] |
F2 — Setting Mode
The following table reproduces the field-setting items and available setting codes shown in the supplied VII reference. Default identifies the setting marked as standard in the source.
| Classification | Item | Setting Mode | Setting Codes / Functions |
|---|---|---|---|
| Install | 00 | Pipe length setting | 00 — 40–65 m (Default) 01 — 0–40 m 02 — 65–90 m 03 — 90–120 m 04 — 120–150 m |
| Correction | 10 | Sequential start shift | 00 — Normal (Default) 01 — 21 sec delay 02 — 42 sec delay 03 — 63 sec delay |
| 11 | Cooling capacity shift | 00 — Normal mode (Default) 01 — Save energy mode 1 (+2°C) 02 — High power mode 1 (−2°C) 03 — High power mode 2 (−4°C) | |
| 12 | Heating capacity shift | 00 — Normal mode (Default) 01 — Save energy mode (+2°C) 02 — High power mode 1 (+2°C) 03 — High power mode 2 (+4°C) | |
| 13 | Defrost setting shift | 00 — End temperature: Normal (Default) 01 — End temperature: Higher | |
| Change of function 1 | 20 | Switching between forced stop or emergency stop | 00 — Forced stop (Default) 01 — Emergency stop |
| 21 | Operation mode selecting method | 00 — Priority given to the first command (Default) 01 — Priority given to external input of outdoor unit 02 — Priority given to master indoor unit | |
| 22 | Snow falling protection fan mode | 00 — Normal operation (Default) 01 — Snow falling protection fan mode | |
| 23 | Interval setting for snow falling protection fan mode | 00 — Standard (30 min) (Default) 01 — Short 1 (5 min) 02 — Short 2 (10 min) 03 — Short 3 (20 min) | |
| 24 | High static pressure mode | 00 — Standard (Default) 01 — High static pressure 1 (equivalent to 30 Pa) 02 — High static pressure 2 (equivalent to 80 Pa) | |
| 28 | Change of unit — Temperature | 00 — Celsius (°C) (Default) 01 — Fahrenheit (°F) | |
| 29 | Change of unit — Pressure | 00 — MPa (Default) 01 — psi | |
| Change of function 2 | 30 | Energy saving level setting | 00 — Level 1 (stop) (Default) 01 — Level 2 (operated at 40% capacity) 02 — Level 3 (operated at 60% capacity) 03 — Level 4 (operated at 80% capacity) 04 — Level 5 (operated at 100% capacity) |
| Low noise setting 1 | 40 | Capacity priority setting — in low noise mode | 00 — Off (quiet priority) (Default) 01 — On (capacity priority) |
| 41 | Low noise mode setting | 00 — Off (Normal) (Default) 01 — On (Low noise mode operation is always done) | |
| 42 | Low noise mode operation level setting | 00 — Level 1 (55 dB) (Default) 01 — Level 2 (50 dB) | |
| Change of function 3 | 60 | Back up operation | 00*1 — On (Default) 01*2 — Off |
| Change of function 4 | 70 | Electricity meter No. setting 1 | Setting code 00–99; setting number x00–x99. Default: 00. Refer to Design & Technical Manual for details. |
| 71 | Electricity meter No. setting 2 | Setting code 00–02; setting number 0xx–2xx. Default: 00. Refer to Design & Technical Manual for details. | |
| 72 | Electricity meter pulse setting 1 | Setting code 00–99; setting number xx00–xx99. Default: 00. Refer to Design & Technical Manual for details. | |
| 73 | Electricity meter pulse setting 2 | Setting code 00–99; setting number 00xx–99xx. Default: 00. Refer to Design & Technical Manual for details. |
Setting Notes
- *1 Backup operation ON: if one compressor fails, backup operation will be performed by the remaining compressor.
- *2 Backup operation OFF: if one compressor fails, all units will abnormal stop.
- *3 Electricity meter number: when the electricity meter number is set to 000 or 201–299, pulse input to CN135 becomes ineffective. Available setting numbers are 001–200.
- *4 Electricity meter pulse setting: when set to 0000, pulse input to CN135 becomes ineffective. Available setting numbers are 0001–9999.
Technician tip: Use F1 to capture live values before changing F2 settings. This provides a useful baseline when diagnosing capacity, pressure, temperature, EEV or compressor-operation concerns.