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1.

 

Technical data 

 

Recommended power sources 

Perun ETU++ works with any power source that provides a voltage between 7 and 17 volts and can 
deliver  enough  current  to  ensure  smooth  cycling  of  the  replica.  Li-Po  and  Li-Ion  batteries  with  a 
nominal voltage of 7.4, 11.1 or 14.8 volts are recommended. It is also advised to use batteries with 
p

ossibly high „C” parameter and 

capacity. This is safer for the battery, as it should not be working on 

the edge of its capability. In this video, we are showing why: 

https://www.youtube.com/watch?v=s8RKcIy810A

 

Capacity and the 

„C” parameter also influence the rate of fire of the replica:

 

https://www.youtube.com/watch?v=5hO25aPvHcU

 

Compatibility with high-ROF and high-power builds 

Perun ETU++ can work with even the most demanding setups, both regarding rate of fire and muzzle 
velocity. 

Electronic fuse 

Perun ETU++ has an integrated electronic fuse, which will automatically cut the power off in case of a 
short circuit or when a gearbox jam is detected. The fuse does not wear out or need to be replaced. 

Battery connector type 

Perun ETU++ comes with an already soldered T-Plug connector. 

Power consumption when idle 

Don’t  leave  the  battery  connected  to  the  replica,  when  you  are  not  using  it!  When  idle  (battery 

connected, replica not shooting) ETU++ consumes 0,75mA. To put it in context, this would drain a half-
laden 1200mAh battery in around a month. 

2.

 

Features and programming 

To enter the programming mode: 

 

F

or “SEMI”

 

 

keep the selector on “SEMI” for a couple 

of  seconds,  then  go  to  “AUTO”  and  back,  twice

(

“SEMI” →

 

“AUTO” →

 

“SEMI” →

 

“AUTO” →

 

“SEMI”

Successful  entry  into  the  programming  mode 

for  “SEMI”

 

will  be  confirmed  by 

one  sound  signal  and  the  blue  LED 

light. 

 

Fo

r  “AUTO”

 

 

keep  the  selector  on  “AUTO”  for  a 

couple of seconds, then go to “SEMI” and back, twice

(

“AUTO” →

 

“SEMI” →

 

“AUTO” →

 

“SEMI” →

 

“AUTO”

Successful  entry  into  the  programming  mode 

for  “AUTO”

 

will be confirmed by 

three sound signals and the red LED 

light. 

Switching  the  selector 

between  “AUTO”  and  “SEMI”  and 

back allows to move between the modes. Pulling the trigger 
allows to enable, disable, or set levels for the modes.

 

Summary of Contents for ETU++

Page 1: ...rent battery types Reading this manual will help you fully exploit this unit s potential and in case of encountering any problems you can look here for solutions Manufacturer Perun Barwicka 8 St 60 192 Poznań Poland e mail info perunairsoft pl Table of contents 1 Technical data 2 2 Features and programming 2 3 Factory settings 4 4 Diagnostic system 5 5 Switch check 7 6 Custom DIY projects 7 ...

Page 2: ...e of a short circuit or when a gearbox jam is detected The fuse does not wear out or need to be replaced Battery connector type Perun ETU comes with an already soldered T Plug connector Power consumption when idle Don t leave the battery connected to the replica when you are not using it When idle battery connected replica not shooting ETU consumes 0 75mA To put it in context this would drain a ha...

Page 3: ...cate braking levels from 1 the weakest to 5 the strongest Attention While precocking is on the AB setting becomes irrelevant However any programmed AB setting will be stored in memory and will become effective as soon as precocking is disabled Precocking Yellow When shooting on semi precocking keeps the piston in the rear position ready for the shot This decreases the time between pulling the trig...

Page 4: ...s disabled 1 to 5 signals indicate interval levels from 1 the shortest to 5 the longest Li Po and Li Ion alarm Teal Li Po and Li Ion alarm informs the user that battery voltage has fallen below 3 7V per cell at which the battery should not be further used and must be recharged The unit automatically detects the number of cells in the battery and determines a safe voltage range The need for battery...

Page 5: ...The unit will start functioning normally after the battery is reconnected unless there still is a short circuit that will be detected at the next start up Trigger pull detected during start up Yellow and purple blinking alternately The unit detected that the trigger was being held during start up This can also indicate a short circuit of the signal wiring or mechanical malfunction of the trigger m...

Page 6: ...erably with a T deans socket made by a different manufacturer Battery and or the motor heat up very much The battery has a too low capacity mAh and or the C parameter Use a battery with higher capacity and or the C parameter The motor is too weak Use a stronger motor possibly with neodymium magnets Increased motor load caused by excessive friction for example caused by improper shimming motor posi...

Page 7: ...or gear Green The sector gear switch was closed Checking the trigger and selector sensor can be done by simply pulling the trigger or switching the selector between SEMI and AUTO positions This can be done without any disassembly of the replica In order to check the sector gear switch it s best to open the gearbox and remove everything out of it except for the switches and the sector gear make sur...

Page 8: ...wide variety of models Therefore use any switches that will best suit your project Here is a short description of what does ETU expect from each of the switches Selector When the switch is closed ETU sees it as AUTO and when it s open it sees SEMI This is pretty much irrelevant however as the firing modes in ETU are freely programmable Please note that the safe mode can only be achieved either by ...

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