Before a new flight you have to set WAITING mode.
Initially the timer is in SLEEP OFF mode with the tow hook open and in the rearward position (LS is OFF, HS is OFF). Closing the latch with the hook back (LS is ON, HS is OFF) wakes the timer up and sets it to WAITING mode. In WAITING mode it gives a double beep every 2 seconds. The servo moves to the first position defined in the start section of the FLIGHT program before starting to make the WAITING mode double beeps. If the volt option is present in the more section and the voltage is less than the specified value, the "voltage low warning" signal (long beeps for 10 seconds) is made after the servo movement and before the WAITING double beeps start.
When the hook is latched and the timer is in WAITING mode moving the hook forward will set the timer to FAILSAFE mode. This will happen automatically when you start towing.
When the timer is in WAITING mode the ring must be put on the hook and latched without pulling it forward or the timer will go to WORK mode, run the bunt sequence and go to the first glide setting. If this happens, the timer should be stopped by opening the latch and pulling the hook forward three times within three seconds or waiting until the d/t time expires. All pre-flight preparations must then be repeated from the first step.
Alternatively, the hook can be pulled forward and latched without letting it move back. This will set the servo position as described above but the timer will be in the FAILSAFE mode. Its actions at this point are described in the Towing section below. The tow hook must be held forward before starting to tow.
After 2 minutes of inactivity in WAITING mode, the timer will reset itself to SLEEP mode (LS ON, hook latched) or to SLEEP OFF mode (LS OFF, hook open). Moving the tow hook forward in SLEEP mode puts the timer back into WAITING mode because the hook will still be latched. If the timer goes to SLEEP OFF mode (latch open) it must be restarted as described above.
During normal operation the red LED flashes when the timer beeps. If the LED stays on continuously during WAITING, FAILSAFE or SLEEP modes the supply voltage is too low. Check the battery and either charge it or discard it if it has failed.
NOTE: SLEEP mode does not wake up when the hook is pulled forward. If the hook is opened in this mode the timer goes immediately to SLEEP OFF mode.
During towing the timer is in FAILSAFE mode to protect the model against a line break or accidental release with the line still on the model.
When the tow hook is forward (LS is ON, HS is ON) the timer is set to zero and does not beep. When the hook is back (LS is ON, HS is OFF), the timer beeps every second. If the tow hook stays back for longer than the configurable "failsafe time", the timer executes the programmed dethermalisation actions. Each time the hook moves forward (HS is ON) during the "failsafe time", the timer is reset back to zero.
When the tow hook is open and in the forward position during acceleration (LS is OFF, HS is ON) the timer is in READY mode. The red LED light is on and the timer buzzes. The servo movements commanded by the olat and kola options take place at the specified times after the latch opens and the timer enters READY mode. See the OLA section of the manual for more details.
After releasing the model from the towline, the hook moves back (HS is OFF) and the FLIGHT program starts to run in WORK mode. It executes the second and subsequent programmed steps in the start section of the program. When this is completed it executes the glide section.
If the hook remains forward for longer than the configurable "bailout time" the launch is abandoned and the FLIGHT program starts to run in WORK mode, starting from the glide or dt section of the program. The hook option sets the "bailout time" and starting section.
After releasing the tow line the model pitches up. At this moment it's vertical acceleration opens the inertial tow hook latch (LS is off) and starts the FLIGHT program running in WORK mode. It executes the second and subsequent programmed steps in the start section of the program. When this is completed it executes the glide section.
The servo movements commanded by the olat and kola options take place at the specified times after the the hook is extended (OLA ON). See the OLA section of the manual for more details.
The hook option and "bailout time" are ignored when the inertial tow hook is used.
The timer is in WORK mode.
The timer will beep every second. The programmed steps, if any, in the glide section of the FLIGHT program take place at the programmed time.
Dethermalisation takes place when:
In addition, the dethermalisation action can be forced by moving the tow hook forward, with the latch open, three or more times within three seconds.
During the dethermalisation action the servo movement commands in the dt section of the FLIGHT program are executed. Following this the timer waits two seconds for the servo to settle before setting itself to SLEEP OFF mode. In this state it uses the minimum possible power.
The timer modes and the permitted transitions between them are shown in a separate state diagram. You may find it helpful to refer to this while you are learning how the timer operates.
The power consumption in the different modes is:
| WAITING | 6 | mA |
| FAILSAFE | 10 | mA |
| READY | 10 | mA |
| WORK | 10 | mA for 1 installed servo (the servo doesn't move) |
| 150 | mA for 1 installed servo (the servo is turning) | |
| SLEEP | 1 | mA |
| SLEEP OFF | 5 | microamperes |
See Batteries for details of suitable batteries and charging regimes.