![background image](http://html1.mh-extra.com/html/daikin/sky-air-b-series-r-410a/sky-air-b-series-r-410a_service-manual_2460071085.webp)
Indoor Unit
Si21-205
74
Function and Control
1. Indoor Unit
1.1
Function Outline
FFQ-B, FHQ-B
Indoor Unit
Suction Sensor(R1T)
Heat Exchanger Sensor
(R2T)
Heat Exchanger Sensor
(R3T)
(Output)
(Input)
Two thermostats used, suction
and remote controller.
Optional for FHQ
Only for FHQ
Float Switch
No. of Fan Turns
Only for FHQ
Wireless units only
Limit Switch for Flap
(Not provided for wireless
remote controller.)
Remote Controller
Sensor
Emergency Operation
Switch
Remote Controller with
Liquid Crystal
ON/OFF
Air flow direction,
Fan speed, etc.
Thermostat Control
Monitoring Function
Cool/Heat Automatic
Function
Program Dry
Fan Operation
Drain Pump Control
Freeze-up Protection
Function
Heating Overload Control
Defrosting
Indoor Unit Fan Control
Phase control
Cold Air Prevention
Function
Flap Control
Operation Mode Guard
Function
Malfunction Detection
Function
Ceiling Soiling Prevention
Function
Fan Motor
Drain Pump
Optional for FHQ
Wireless units only
Flap Motor
LED Display
Buzzer, LED
(S2540)
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...