SiUS281117
Outline of Control (Indoor Unit)
62
Function and Control
Note:
1: Fixing of the fan H tap.
2: The heater backup prohibiting conditions are prioritized. Even when the heater ON
conditions are met, the heater is turned OFF when the prohibiting conditions are met.
3: The operation must continue for a certain period of time after the heater turns OFF.
4: The thermostat steps for this control comply with the “6.9 4 Step Thermostat Processing
6.9
4 Step Thermostat Processing (FTQ)
[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 in accordance with [Thermostat Step
2, 3, or 4] or [Thermostat Step 1, 2, or 3].
For more details of the heater, see 6.8 Heater control.
[Detail]
&
&
OR
Condition A
•
Hot-water heater = "1" (ON)
OR
Condition B
•
Heating mode
•
Thermostat step 1 = "ON"
•
Not during fan residual operation
•
[Electrical heater setting] = "01"
•
[Electrical heater setting] = "03"
•
Elimination of Condition A
•
Indoor unit error [Stop due to error]
•
Indoor unit error [Abnormal stop]
•
Indoor unit error [Remote control thermistor error]
•
Indoor unit error [Suction air thermistor error]
•
During defrosting or oil return operation
Heater backup
prohibiting conditions
∗
2
&
OR
•
Drain pump abnormal output = OFF
•
Thermostat OFF error has not occurred.
•
Forced thermostat OFF = "0" (OFF)
•
Normal operation = ON
•
Remote control operation mode = "Heating"
•
Not during anti-freeze operation
• [Thermostat step 1] = "OFF"
• [Thermostat step 2] = "OFF"
• [Thermostat step 3] = "OFF"
• [Thermostat step 4] = "OFF"
Elimination conditions of the above
Perform the processing
in the following chart.
(1) Cooling
(2) Heating
1
∗
1
1
∗
1
Set temperature
Controlled temperature (˚F)
[Thermostat step 1]
ON
OFF
7.2
3.6
[Thermostat step 2]
ON
OFF
∗
1: This value varies according to the field setting
Set temperature
[Thermostat step 1]
ON
OFF
[Thermostat step 4]
1
∗
1
1
∗
1
<Ttson>
<Ttsoff>
[Thermostat step 2]
ON
OFF
2.7
2.7
[Thermostat step 3]
2.7
2.7
ON
OFF
ON
OFF
∗
1: This value varies according to the field setting
Controlled
temperature (˚F)
