Daikin VRV EMERION RXYQ-AATJA, Service Manual

Page: 152 / 429

Outline of Control (Indoor Unit) SiUS342303E
145 Part 4 Functions and Control
Note(s)
9.14 3-Step Thermostat Processing (FXTQ-TA Models)
Outline
The thermostat ON/OFF for the indoor unit is controlled in accordance with Thermostat step 1.
The heater ON/OFF operation during heating is controlled as follows.
Thermostat step 2, 3: Auxiliary electric heater control
Thermostat step 1, 2: Heat pump lockout control
For more details of the heater, refer to
Heater Control (FXTQ-TA Models) on page 141.
Detail

1. S value varies automatically based on the room temperature trend.

2. Ton + S > – B (°C), Toff + S < A (°C)

3. For parameters, refer to page 164.

4. A and B values vary automatically based on the field setting 12 (22)-2.

5. If, directly after a change in conditions, it is such that the thermostat could be either ON or OFF
(controlled temperature is within ranges A and B ), the thermostat will be switched to ON.
&
•
No errors (except errors in which the system keeps operating)
has occ u rred.
•
Remote controller ON
• Thermostat step 1: OFF
• Thermostat step 2: OFF
• Thermostat step 3: OFF
Other conditions
Perform the processing in
the following chart. (
∗
5)
(1) Cooling (2) Heating
Thermostat step 2
Thermostat step 1
ON
OFF
ON
OFF
2+ S (
∗
1)
4+ S (
∗
1)
A (
∗
4) B (
∗
4)
Controlled temperat u re
(Tcon)(°C)
Set temperat u re (Ts’)
Thermostat step 3
Thermostat step 2
Thermostat step 1
ON
OFF
ON
OFF
ON
OFF
1.5 1.5
Toff+ S (
∗
1,2,3) Ton+ S
(
∗
1,2,3)
A (
∗
4) B (
∗
4)
Set temperat u re (Ts’)
Controlled
temperat u re
(Tcon)(°C)