Heating Operation; Auto Operation - Panasonic S-22KA1E5 Service Manual

15.4 Heating Operation

15.4.1 Thermostat Control
• Thermostat off point (ΔD) is determined using Indoor Intake Temperature - Remote Control Setting Temperature.
Default thermostat off point is shown in table below:
Model
Indoor fan
speed ≥ Me
Thermostat OFF
Point (ΔD)
Indoor fan
speed < Me
Thermostat OFF point
• Thermostat OFF continues for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature >
Thermostat OFF point – 1.0°C
15.4.2 Expansion Valve Control
• During Thermostat OFF, the indoor unit expansion valve operation is controlled by the system.

15.5 Auto Operation

• Operation mode is determined by indoor intake temperature and remote control setting temperature.
Indoor intake temperature < remote control setting temperature, Heat mode is selected.
o
Indoor intake temperature ≥ remote control setting temperature, Cool mode is selected.
o
• Indoor intake temperature (even for the indoor unit is standing by for different operation mode) is judged by
Operate indoor fan at Lo- for 30 seconds, for indoor unit with DC fan motor.
o
Operate indoor fan at Lo for 30 seconds, for indoor unit with AC fan motor.
o
•
Immediate judgment to Heat mode if
Indoor intake temperature < 16°C
o
Deice operation
o
•
The operation mode judgment repeats every 3 hours.
•
For second judgment onwards
Indoor intake temperature ≥ remote control setting temperature + 3°C change from Heat Mode to Cool Mode.
o
Indoor intake temperature < remote control setting temperature - 3°C, change from Cool Mode to Heat Mode.
o
Wall Mounted 60 x 60 Cassette
(KA1-series) (YA1-series)
2.0 3.5
2.0 4.0
Intake air temperature – remote
controller temperature setting
Thermostat
OFF
Heating
Figure 15: Heating thermostat OFF characteristic
95 x 95 Cassette Slim Hide-away
(UA1-series) (NA1-series)
-1.5
-2.0
Thermostat OFF point - 1.0
221
Low Static Hide-away
(MA1-series)
4.5 / 5.6 6.3 / 7.1 / 9.0
kW
2.5 2.5
2.5 2.5
kW
2.5
2.5