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H-28 Specification

1Basic parameters



 Operating Voltage

Operating voltage switch board main chip: +3.3 V - +5.5 V, +5 V DC voltage generally used as the standard operating voltage, error 5%

Power board voltage: Input voltage AC 220V, output DC voltage +12 V and +5 V;

+12 V DC voltage for the relay; +5 V DC voltage supply switch board controller chips work, the error is 5%

Lighting voltage is AC220V

 Operating Current

 Switch board working current I Q 200mA
  Power board working current I Q 500mA


 See photos

2Function Description

1, Power key: enters the standby state .

2 , fan + keys : power status, press the + key a second fan , then the fan a file has been opened , the power turned on simultaneously. 2nd press fan + key, then turn the fan 2 files , 3rd press fan + key, then turn the fan 3 files , then invalid.

3, the fan - key : power state to 3-2-1-0-3 stalls in cycles .

4 illuminated buttons : independent power button, can be individually turned on and off lighting.

5 , smoke keys : power state, can be turned on and off smoke, smoke is sensed , the fan starts 80 seconds after the mid-range , delay start countdown one minute can be turned off midway smoke .

Thermistor sensing temperature , the temperature reached 37.5 ( currently tentative ) for 10 seconds , the fan starts above ( smoke ) .

Delay function: when the fan is running , press the power button to enter the delay state , the default delay time is 3:00 , the time delay, press the power button to end the delay , turn off the fan .

Set delay time: delay time before normal operation , press the fan + - keys to add and subtract the number of minutes ( 1-30 minute cycle ) , long press the fan + - buttons to quickly add and subtract the number of minutes .

Set YORK : In standby mode , press and hold the power button for 3 seconds , the buzzer sounds a tone , press fan + - keys to set the hour , press and quickly add and subtract . Press the power button , the right 88 blinking and the setting above, no operation 5 seconds or press the power button to exit.

Remote control function

ON / OFF: power button and delay function

SPEED : fan +

SPEED : Fan -

TIMER: ( in fact, should be AUTO: Smoke key )

LIGHT: Lighting

3Dimension Data

Switch display panel
Physical map

Key Description Figure

PCB Layout

Switch top view Dimensions

Switch back top view

Power board

Power Board physical map

PCB Layout



Physical map



Physical map

PCB layout


4All kinds of cable

Power strip with switch cable between the display panel

Lighting cable

Fan cable

Smoke cable

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