The Temperzone SAT-2 Thermostat is a sophisticated microprocessor-controlled wall thermostat designed to maintain a high level of comfort in rooms. It offers a user-friendly interface with advanced features, including programmable timers and various operating modes, allowing users to "set it and forget it."
Function Description:
The SAT-2 Thermostat controls an air conditioning system, offering Cool, Fan, Heat (for reverse cycle systems only), and Auto modes. It allows for precise temperature adjustment within a range of 16°C to 30°C and provides options for Auto, High, Medium, and Low fan speeds. The thermostat features a 7-day programmable timer, enabling users to set two start/stop sessions per day, as well as one regular session per week. A bypass function allows immediate operation of the air conditioner, overriding programmed times or the on/off button. The Sleep function is designed to save energy by automatically adjusting the set temperature over a two-hour period, compensating for changes in metabolism during sleep. This function is available in Cool, Heat, and Auto modes. For systems with underceiling indoor units, an Air Swing function is available to control the air louvre sweep. The thermostat also supports optional Zone Control for installations with dampers, allowing individual zones to be turned on or off, with Zone 1 always acting as the master zone. A Key Lock function is included to prevent unauthorized changes to settings. The device provides visual feedback through a backlighting display, which changes color to indicate different operating modes and system faults. Audible feedback is provided by a buzzer, which beeps to acknowledge valid key entries or wireless remote handset reception.
Important Technical Specifications:
- Temperature Setting Range: 16°C to 30°C
- Programmable Timer: 7 days, two start/stop sessions per day, one regular session per week.
- Fan Speeds: Auto, High, Medium, Low.
- Backlight Colors: Blue (Cool), Yellow (Fan), Reddish orange (Heat), Light violet (Auto), Red (System fault).
- Battery Backup: Maintains real-time clock and control data during power failures using a lithium CR2032 cell battery.
- Remote Control (Option): Infra-red remote controller.
Usage Features:
- On/Off Operation: A dedicated button to start and stop the air conditioner. The backlight and system turn on when activated.
- Room Temperature Adjustment: Buttons to increase or decrease the preset temperature by 1°C increments. The display shows the current room temperature.
- Mode Selection: A "MODE" button cycles through Cool, Fan, Heat, and Auto operation modes.
- Cool: Cools the room to the set temperature if too warm.
- Heat: Warms the room to the set temperature if too cool (reverse cycle systems only).
- Auto: Automatically cools or heats the room to the set temperature.
- Fan: Circulates air without changing room temperature.
- Fan Speed Selection: A "FAN" button selects Auto, High, Medium, or Low fan speeds.
- Swing Activation: A "SWING" button activates or deactivates the air louvre sweep function.
- Time Functions:
- Setting Clock: Buttons to enter clock set mode, adjust time in 1-minute increments, and change the set day.
- Setting 7 Day Timer: "TIMER" button selects on or off timer. Users can select between two sessions (P1 or P2) and set the day for the timer. Timer settings can be adjusted in 1-minute increments. The system saves settings 6 seconds after the last key press. All timer settings can be canceled by holding the "CANCEL" key for 5 seconds in non-timer set mode.
- Bypass Function: Holding the "+" button for 3 seconds activates bypass mode, indicated by "-H" on the display. Subsequent presses of the "+" button cycle through 1, 2, or 4 hours of operation. The "CANCEL" button cancels the bypass timer. The display alternates between temperature and countdown hours during bypass.
- Key Lock Function: Activated by holding "TIME" and "MODE" buttons for 3 seconds. The key lock symbol lights up. When active, only the On/Off button, Bypass timer programming, and Bypass timer cancellation are functional; other buttons are ignored. To cancel, hold "TIME" and "MODE" buttons for 3 seconds again.
- Infra Red Reception: A dedicated area to receive signals from the wireless remote handset.
- Error Code Display: Displays relevant error codes and an "ERR" symbol when a fault occurs. Multiple faults are shown sequentially.
Maintenance Features:
- Troubleshooting Guide: Provides solutions for common issues such as the air conditioner not operating, reduced cooling/heating, incorrect triggering, and loss of settings.
- Battery Replacement: Instructions for replacing the CR2032 backup battery, located at the rear of the SAT-2. This involves removing a locking screw, separating the thermostat body from the wall mounting plate, and replacing the battery in the holder.
- Air Filter Check: Suggests checking and cleaning the air filter as part of troubleshooting reduced cooling or heating.
- Outdoor Unit Obstruction Check: Advises checking for obstacles in front of the outdoor unit if cooling or heating is reduced.
- Remote Control Battery Check: Recommends checking remote control batteries if the remote is not operating.
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