Outdoor Fan Control; Rotation Regulating Functions - Daikin FTXB50BV1B Service Manual

Function & Control

2.13 Outdoor Fan Control

Determine from
• Compressor target rotation: higher fan speed with higher rotation.
• Outdoor air temperature.
Cool mode: Higher fan speed with higher outdoor air temperature.
Heat mode: Higher fan speed with lower outdoor air temperature.
When compressor stops, fan OFF delay 30 seconds is carried out

2.14 Rotation Regulating Functions

Command rotation
Starting rotation
∆T
Defrost*
* Defrost control for heat pump model only
2.14.1 Starting Rotation
Starting Control
To avoid excessive oil discharge from compressor or to promote oil lubrication during startup.
To prevent liquid fl ood back to the compressor.
To limit starting current.
When compressor starts to rotate from OFF to ON, compressor rotation is set to run gradually to each upper
limit at a specifi c timer setting.
Compressor
rotation, f
d
c
b
a
1
Model
ARXN/RXN25/35L/M
ARXN/RXN50/60_L
RX50/60CG
ARXN/RXN50/60M
RXB50/60B
Upper limit rotation
Limit rotation
Lower limit rotation
2
a Hz b Hz
(Time, s) (Time, s)
38 (60) 52 (120)
35 (60) 55 (120)
38 (60) 52 (120)
Target rotation
Time (min)
c Hz d Hz
(Time, s) (Time, s)
66 (120) 80 (120)
75 (360) -
66 (120) 80 (120)
Max Hz
(Time, s)
94 (120)
-
94 (120)
18