Daikin FTXS25K3V1B Service Manual

Control Specification SiBE041134EB
40 Functions and Control
3.3 Controls at Mode Changing / Start-up
3.3.1 Preheating Control
Outline The inverter operation in open phase starts with the conditions of the outdoor temperature, the
discharge pipe temperature, the radiation fin temperature, and the preheating command from
the indoor unit.
Detail Outdoor temperature ≥ A°C → Control I
Outdoor temperature < A°C → Control II
Control I

ON condition
Discharge pipe temperature < B°C
Radiation fin temperature < 85°C

OFF condition
Discharge pipe temperature > C°C
Radiation fin temperature ≥ 90°C
Control II

ON condition
Discharge pipe temperature < D°C
Radiation fin temperature < 85°C

OFF condition
Discharge pipe temperature > E°C
Radiation fin temperature ≥ 90°C
3.3.2 Four Way Valve Switching
Outline The four way valve coil is energized / not energized depending on the operation mode.
(Heating: ON, Cooling / Dry / Defrost: OFF) In order to eliminate the switching sound as the four
way valve coil switches from ON to OFF when the heating is stopped, the OFF delay switch of
the four way valve is carried out.
Detail OFF delay switch of four way valve
The four way valve coil is energized for 160 seconds after the operation is stopped.
A (°C) B (°C) C (°C) D (°C) E (°C)
RXS20/25K2V1B –2.5 10 12 10 12
RXS20/25K3V1B
RXS20/25L2V1B
RXS20/25L3V1B
ARXS25L2V1B
ARXS25L3V1B
–2.5 0 2 10 12

Daikin FTXS25K3V1B Specifications

General

Brand	Daikin
Model	FTXS25K3V1B
Category	Air Conditioner
Language	English