Daikin SM-12-012, Service Manual

Page: 5 / 54

Service Manual SM-Inverter_(i) 5
Heat Mode:
- When Ts > Tr - 1.0°C
• Comp, ID Fan and OD Fan ON.
- When Tr
≥
Ts + 1.5°C
• Compressor and Outdoor Fan OFF.
• Indoor Fan off if indoor coil
≤
20°C.
Tr = Room Temperature
Ts = Set Temperature
When heating load is too small, and the room temperature still rising above compressor cut off point, compressor
will stop.
FAN MODE
- Only High, Medium and Low fan speeds are allowed.
- When changing cool mode to fan mode, the compressor will stop and OD fan stops based on fan OFF
control.
- Compressor only ON if the minimum stop time is > 3 minutes and the user change back to cool mode.
- Fan speed will maintain same as during fan mode.
AUTO MODE
- For heat pump only
- Mode switching point:
• Heating Cooling
Tr
≥
Ts + 2.5
• Cooling Heating
Tr
≤
Ts – 2.5
- During initial operation
• Cooling operation: Tr > Ts