SiUS042113E
Control Specification
Part 4 Functions and Control
61
Note(s)
3. Control Specification
3.1 Mode Hierarchy
Outline
The air conditioner control has normal operation mode, forced operation mode, and power
transistor test mode for installation and servicing.
Details
Unless specified otherwise, dry operation command is regarded as cooling operation.
3.2 Frequency Control
Outline
The compressor frequency is determined according to the difference between the room thermistor
temperature and the target temperature.
Air conditioner control mode
Forced operation mode
Forced cooling operation (for p
u
mp down operation)
Power transistor test mode
Normal operation mode
Fan
Cooling (incl
u
des drying)
Heating
Heating
Defrosting
Stop (indoor
u
nit: OFF)
Preheating control
Discharging from capacitor
Stop
(R22375)
Command freq
u
ency
Limit frequency
Skip control
Upper limit f
u
nction
Compressor protection f
u
nction
Lower limit f
u
nction
Fo
u
r way valve operation compensation, etc.
Target frequency
(R18023)
When the shift of the freq
u
ency is less than zero (
Δ
F<0) by PI control,
the target freq
u
ency is
u
sed as the command freq
u
ency.
Dropping f
u
nction
Inp
u
t c
u
rrent control, etc.
Upper limit frequency
FMAX
Lower limit frequency
FMIN
Initial freq
u
ency
PI control
Defrost control
Summary of Contents for FTXM-V Series
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