2-Step Thermostat Processing (Cxtq-Ta Models) - Daikin RXSQ24TAVJU Service Manual

SiUS331708EA

6.15 2-Step Thermostat Processing (CXTQ-TA Models)

Outline The thermostat ON/OFF of the indoor unit is controlled in accordance with Thermostat step 1. The
gas furnace ON/OFF is controlled in accordance with Thermostat step 2.
When gas furnace operation requiring ON signal or water heater ON signal is sent from the outdoor
unit, gas furnace ON/OFF is controlled in accordance with Thermostat step 1.
Detail
• Thermostat step 1: OFF
• Thermostat step 2: OFF
(1) Cooling
ON
Thermostat step 2
OFF
Thermostat step 1
ON
OFF
A (∗4)
Set temperature (Ts')
∗1. S value varies automatically based on the room temperature trend.
Notes:
∗2. Ton + S > –B (°C), Toff + S < A (°C)
∗3. For parameters, refer to page 97.
∗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
Functions and Control
• No errors (except errors in which the system keeps operating)
has occurred.
&
• Remote controller ON
• Initial setting for communication completed
Other conditions
2+S (∗1)
4+S (∗1)
B (∗4)
Controlled temperature
(Tcon)(˚C)
(controlled temperature is within ranges A and B), the thermostat will be switched to ON.
Perform the processing in
the following chart. (∗5)
(2) Heating
Thermostat step 2
ON
Ton+S
OFF
(∗1,2,3)
ON
Thermostat step 1
OFF
Outline of Control (Indoor Unit)
Toff+S (∗1,2,3)
B (∗4) A (∗4)
Controlled
temperature
Set temperature (Ts')
(Tcon)(˚C)
84