¢ Functions
Function Remarks
Air conditioning
control function
Operation mode setting Cooling, Heating, Fan
Fan speed setting HIGH, MED, LOW, AUTO
Temperature setting
Stage 1 (Cooling), Stage 1 (Heating)
Stage 2 (Cooling), Stage 2 (Heating)
Maintenance
function
Indoor unit error monitoring
Communication error detection
Control target error indication
Convertor error monitoring
Others
Two-stage cooling and heating
thermostat operation
Delay off
¢
L
imitation
• Automatic prohibition of remote controller operation
Thermostat operates the indoor units according to the setting temperature by built-in temperature
sensor. Since setting temperature of the remote controller may be different from the setting tem-
perature of the thermostat, remote controller operation prohibition is automatically enabled.
• Air direction adjustment by thermostat
• No fan mode is available in heat pump system.
Do not connect between fan signal terminals (G, G1, G2, or G3) on the convertor and the thermo-
stat by using wire.
• Error code will be displayed on the built-in LED display.
For indoor unit without error code indicator, confirm the LED display inside the thermostat conver-
tor. For details of indoor unit error, refer to the "Error status (External output 2)" in Chapter 8. EX-
TERNAL INPUT AND OUTPUT on page 08-35
.
• For following items, use remote controller.
– Filter sign cancellation
– Indoor unit function settings
– Test run
After all settings are completed, disconnect the remote controller, and connect the Thermostat
convertor.
3-5. Thermostat convertor (UTY-TTRX) - (05-139) - 3. Adaptor/Convertor units
CONTROL
SYSTEM
CONTROL
SYSTEM
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