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Function and 

LED color

 

Description 

ROF reduction

 

 

White 

This  function  allows  to  lower  the  rate  of  automatic  fire.  5  reduction  levels  are 
available: 

 6% ROF reduction 

 12% ROF reduction 

 18% ROF reduction 

 24% ROF reduction 

 30% ROF reduction 

Attention! 

Those  are  approximate  values  and  may  vary  depending  on  replica 

configuration.

 

 
No sound signal while LED glows white means, that the ROF reduction is disabled. 1 
to 5 signals indicate reduction levels from 1 (the smallest) to 5 (the greatest). 

 

Attention! 

Semi-automatic shots and the first shot in burst are always fired without 

any power reduction to retain good trigger response. 

DMR mode

 

 

Purple 

DMR Mode allows only semiautomatic shots and limits their frequency. Its main use 
is for high power, DMR-styled replicas on fields, which demand such limitations. 0.25s, 
0.5s, 1s, 2s and 3s intervals are available. 
 
No sound signal while LED glows purple means, that the DMR mode is 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 replacement is signaled by short sound signals every one minute. 
 
Disable this function if you are using batteries other than Li-Po or Li-Ion. 
 
No  sound  signal  while  LED  glows  white  means,  that the  alarm  is  disabled.  1 signal 
indicates activation of the alarm. 

Master reset

 

 

Red 

Master reset returns the unit to the factory settings. 
 
To reset, pull and hold the trigger for 2 seconds. A long sound signal confirms return 
to factory settings. 

 

3.

 

Factory settings 

 

New units and units, where master reset was activated, will have modes set in a following way: 

 

Firing mode 

 

semi on “SEMI” and auto on “AUTO”

 

 

AB 

 level 3 

 

Precocking 

 disabled 

 

Binary trigger - disabled 

 

ROF reduction 

 disabled 

 

DMR Mode 

 disabled 

 

Li-Po and Li-Ion alarm 

 enabled 

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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