1731DD - Light dimmer JUNG - Free user manual and instructions

Product Type	Universal Rotary Dimmer LED
Brand	JUNG
Model	1731DD
Rated Voltage	AC 230 V ~
Mains Frequency	50 / 60 Hz
Standby Power	Approx. 0.35 W
Power Loss	Approx. 4 W
Ambient Temperature	-5 ... +45 °C
Connected Load (LED)	20 - 420 W (typ. 3 - 400 W for LED lamps)
Operating Modes	Universal (R,L,C,LED), LED trailing edge, LED leading edge
Dimming Principle	Leading edge or trailing edge phase control, auto or manual
Protection Features	Short-circuit (automatic reset), over-temperature, overvoltage
Mounting	Appliance box according to DIN 49073
Connection Type	Screw terminals, clampable conductors: 1x0.5-4 mm², 2x0.5-2.5 mm²
Extension Compatibility	Rotary extension (max 10), 2-wire push-button (unlimited), 3-wire extension
Switch-On Brightness Memory	Yes, can be saved permanently
Minimum Brightness Setting	Adjustable, can be saved permanently
Soft Start	Yes, bulb-preserving
Hotel Card Function	Yes, switch on/off via mains voltage control
Power Boosters	Supported for power extension
Compensation Module	Art. no. KMLED230U (optional accessory)
Warranty	Statutory warranty via specialist trade
Maintenance	Keep dry, clean with dry cloth only
Safety Notes	Installation by skilled electrician only; disconnect circuit breakers before work

Frequently Asked Questions - 1731DD JUNG

What types of loads can this dimmer control?

The JUNG 1731DD dimmer can control dimmable LED lamps, compact fluorescent lamps, incandescent lamps, and halogen lamps (with electronic or inductive transformers). It works with both leading edge and trailing edge phase control, and can automatically adapt to the load in universal mode.

How do I set the minimum brightness?

Ensure the load is off. Press and hold the Dimm-Mode button until the LED lights up, then briefly press repeatedly to select the operating mode. Once the mode is set, press and hold the Dimm-Mode button for more than 1 second. The light turns on at lowest brightness and slowly increases. Release the button when the desired minimum brightness is reached. Save by pressing briefly or waiting 30 seconds.

Can I use this dimmer without a neutral conductor?

Yes, the dimmer can operate without a neutral conductor. However, the minimum load must be at least 50 W (except for HV-LED and compact fluorescent lamps). For optimal performance, connecting a neutral conductor is recommended if available.

How do I save the switch-on brightness?

Adjust the brightness to the desired level, then press the setting knob for longer than 4 seconds. The light will briefly switch off and on again to confirm. To delete the saved brightness, press the knob again for longer than 4 seconds while the light is on at the saved brightness; the next switch-on will use the last set brightness.

What does the hotel card function do?

The hotel card function allows the dimmer to automatically turn on the light with the saved switch-on brightness when mains voltage is restored (e.g., when a hotel card is inserted). It is available only in LED trailing edge or LED leading edge modes. To enable or disable, press and hold the rotary axle, then press the Dimm-Mode button for more than 4 seconds; the LED flashes red (on) or green (off).

Why do my LED lamps flicker or buzz?

Flickering or buzzing can be due to incompatible lamps, incorrect operating mode, or the dimmer being used without a neutral conductor. Try the following: 1) Ensure lamps are dimmable. 2) Change the operating mode (e.g., from universal to LED trailing edge). 3) Reduce the connected load. 4) If possible, connect a neutral conductor. 5) Replace lamps with a different type.

How do I reset the dimmer after short-circuit or over-temperature protection?

First, disconnect the dimmer from the mains by switching off the associated circuit breaker. Eliminate any short-circuit or reduce the connected load if over-temperature. Let the dimmer cool for at least 15 minutes. Then switch the circuit breaker back on and test the dimmer. If the problem persists, check the load or contact a skilled electrician.

Can I use multiple dimmers or extensions together?

Yes, you can connect up to 10 rotary extensions or 3-wire extensions, and an unlimited number of 2-wire push-buttons. The total line length for extensions should not exceed 100 m. For higher power loads, use power boosters as described in their instructions.

What is the maximum connected load for LED lamps?

The maximum connected load for LED lamps is typically 20-420 W, with a typical range of 3-400 W for LED lamps. For electronic transformers with LV-LED, it is 20-200 W. The exact values depend on the operating mode and ambient temperature. At 25°C, the rated load is 20-420 W for ohmic-capacitive loads.

How do I clean the dimmer?

Use only a dry or slightly damp cloth to clean the surface. Do not use any cleaning agents or abrasives as they may damage the device. Ensure the dimmer is switched off and disconnected from power before cleaning.

USER MANUAL 1731DD JUNG

Operating instructions

Universal rotary dimmer LED

Art. no. 1731DD

ALBRECHT JUNG GMBH & CO. KG

Vollmestraße 1

58579 Schalksmühle

GERMANY

Telefon: [phone]

Telefax: [phone]

[e-mail]

www.jung.de

Table of Contents

1 Safety instructions.... 3
2 Intended use 3
3 Product characteristics.... 3
4 Operation 4
5 Information for electrically skilled persons 5
5.1 Mounting and electrical connection.... 5
5.2 Commissioning 7
6 Technical data....9
7 Troubleshooting 10
8 Accessories.... 11
9 Warranty.... 12

1 Safety instructions

Electrical devices may only be mounted and connected by electrically skilled persons.

Serious injuries, fire or property damage possible. Please read and follow manual fully.

Danger of electric shock. Device is not suitable for disconnection from supply voltage because mains potential even is applied on the load when the device is switched off. Before carrying out work on the device or load, switch off all associated circuit breakers.

Risk of destruction of the dimmer and load if the set operating mode and load type do not match. Set the correct dimming principle before connecting or exchanging the load.

Fire hazard. For operation with inductive transformers, each transformer must be fused on the primary side in accordance with the manufacturer's instructions. Only safety transformers according to EN 61558-2-6 may be used.

This manual is an integral part of the product, and must remain with the end customer.

2 Intended use

• Switching and dimming of lighting
  – Operation with suitable cover
• Mounting in appliance box with dimensions according to DIN 49073

3 Product characteristics

Product characteristics

– Device works according to the leading edge phase control or trailing edge phase control principle
- Automatic or manual setting of the dimming principle suitable for the load
– Indication of the set operating mode by means LED
– Operation without neutral conductor possible
- Switch-on via bulb-preserving soft start
- Switch on with last saved brightness or saved switch-on brightness
- Switch-on brightness can be saved permanently
– Minimum brightness can be saved permanently
– Connection of extensions possible
- Electronic short-circuit protection with permanent switch-off after 7 seconds at the latest
– Electronic over-temperature protection
- Hotel card function

i Power extension possible by means of power boosters.

4 Operation

Switching light or adjusting brightness

Operation on the main device or a rotary extension is identical.

graph TD
    A["Start"] --> B{Decision}
    B -->|Yes| C["Process Step 1"]
    B -->|No| D["Process Step 2"]
    C --> E["Output"]
    D --> F["Output"]

Image 1: Switching light or adjusting brightness

■ Press the setting knob briefly: Light switches on or off (see figure 1).
■ Turn the setting knob quickly: Brightness is changed quickly (see figure 1).
■ Turn the setting knob slowly: Brightness is changed slowly (see figure 1).

Switching the light on at minimum or maximum brightness

graph TD
    A["1."] --> B["2."]
    B --> C["min."]
    C --> D["△"]
    D --> E["△"]
    E --> F["△"]
    F --> G["△"]
    G --> H["△"]
    H --> I["△"]
    I --> J["△"]
    J --> K["△"]
    K --> L["△"]
    L --> M["△"]
    M --> N["△"]
    N --> O["△"]
    O --> P["△"]
    P --> Q["△"]
    Q --> R["△"]
    R --> S["△"]
    S --> T["△"]
    T --> U["△"]
    U --> V["△"]
    V --> W["△"]
    W --> X["△"]
    X --> Y["△"]
    Y --> Z["△"]

Image 2: Switching on the light at minimum or maximum brightness

■ Turn the setting knob by a quarter turn, then press the setting knob briefly: Light switches on at minimum brightness or maximum brightness (see figure 2).

Saving the switch-on brightness

■ Adjust the brightness.
■ Press the setting knob for longer than 4 seconds.
Switch-on brightness is saved. The lighting switches briefly off and on again as confirmation.

Deleting the switch-on brightness

■ Press the setting knob briefly: Light switches on at the saved switch-on brightness.
■ Press the setting knob for longer than 4 seconds.

The switch-on brightness is deleted. Switching on takes place at the last brightness value set. For confirmation, the light is switched off briefly and switched on again.

Operation using 2-wire or 3-wire extension with LB Management push-button 1-gang or push-button

■ Press briefly: Light switches on or off.
■ Press long with the light switched off: Switch on at minimum brightness.
■ Press long with the light switched on: Set brightness. The dimming operation stops at the appropriate end value.

i Push-button: The dimming direction is changed with each new long actuation.

■ Press the operating cover over its entire surface for longer than 4 seconds with the light switched on:

Save switch-on brightness. The lighting switches briefly off and on again as confirmation.

On saving the same brightness again, the switch-on brightness is deleted. Switching on takes place at the last brightness value set. For confirmation, the light is switched off briefly and switched on again.
i Push-button: Switch-on brightness cannot be saved or deleted.

5 Information for electrically skilled persons

5.1 Mounting and electrical connection

DANGER!

Mortal danger of electric shock.

Disconnect the device. Cover up live parts.

Mounting and electrical connection

Image 3: Connection diagram with optional extensions

(1) Button Dimm-Mode
(2) Display LED of the dimming principle
(3) Rotary axle
(4) Rotary extension, 3-wire extension
(5) 2-wire extension
(6) Push-button, NO contact

Connect 600 Watt LED lamps or compact fluorescent lamps at most per 16 ampere circuit breaker. When connecting transformers, observe the data of the transformer manufacturer.

The dimmer takes into account the different electronic characteristics of most dimmable LED lamps on the market. However, it cannot be guaranteed that in individual cases the desired results may not be achieved.

Operation without neutral conductor possible.

Only connect illuminated push-buttons if they have a separate N terminal.

Image 4: Clampable conductor cross-section

The light can be switched by briefly pressing the Dimm-Mode button (1).

Reset the overheating protection / short-circuit protection

If the electronic overheating or short-circuit protection has been activated, separate the dimmer from the grid.

5.2 Commissioning

Operating mode: Universal, R,L,C,LED (factory setting)

- Automatic calibration to the load, dimming principle, trailing edge phase control, leading edge phase control or LED leading edge phase control

Operating mode: LED trailing edge phase control, LED

- Loads can be dimmed according to the trailing edge phase control principle.

i The connection of inductive transformers is not permitted.

Operating mode: LED leading edge phase control, LED

- Loads can be dimmed according to the leading edge phase control principle.

i The connection of inductive transformers is not permitted.

Setting operating mode and minimum brightness

Precondition: Load is switched off.

■ Press the button Dimm-Mode (1) until LED (2) lights up.

LED	Dimm-Mode
GN (grün, green)	R,L,C,LED
RD (rot, red)	LED
BU (blau, blue)	LED

Image 5: Assignment of LED colour to dimming principle

- Keep briefly pressing button mode is selected. Dimm-Mode (1) until the necessary operating

The LED (2) lights up in the colour of the selected operating mode (see figure 5).

■ Press the button pressed. Dimm-Mode (1) for longer than 1 second and keep it

LED (2) flashes. Light switches on at the lowest brightness and slowly becomes brighter.

When changing the operating mode to universal, the calibration to the load is first performed. Keep the Dimm-Mode button (1) pressed.

i In the lowest dimming position, a lamp light must be visible.

■ Once the desired minimum brightness is reached, release the button Dimm-Mode (1).

LED (2) lights up, operating mode and minimum brightness are set.

■ Optionally change the minimum brightness again: Press the button Dimm-Mode (1) for longer than 1 second. Light switches again to the lowest brightness and slowly becomes brighter.

■ Save the settings: Press the button Dimm-Mode (1) for less than 1 second or do not press for 30 seconds. The LED (2) goes out.

Switching the hotel card function on or off

If a hotel card is used, removing the card switches off the mains voltage, inserting the card switches it on. The hotel card function means that no separate operation of the dimmer is required. After mains voltage return the dimmer switches on the light with the saved switch-on brightness. Only the operating modes LED trailing edge phase control or LED leading edge phase control are available.

Precondition: Load is switched off.

■ Press and hold down the rotary axle (3) until the setting was made.

■ Press the Dimm-Mode button (1) for more than 4 seconds.

LED (2) flashes green or red.

■ Press button Dimm-Mode (1) briefly.

LED (2) flashes red. The hotel card function is switched on. LED (2) flashes green. The hotel card function is switched off.

■ Release the rotary axle (3).

The setting is saved. For confirmation, the light is briefly switched on and switched off again.

If the Universal operating mode was set before the hotel card function was switched on, the system automatically switches to LED trailing edge phase control or LED leading edge phase control. If the LED trailing edge phase control or LED leading edge phase control operating mode was set, it is retained. If the hotel card function is switched off, the last set operating mode is retained.

6 Technical data

Rated voltage AC 230 V \~

Mains frequency 50 / 60 Hz

Standby power approx. 0.35 W

Power loss approx. 4 W

Ambient temperature -5 ... +45 °C

Connected load at 25°C (see figure)

W20...420	W/VA20...420	W3...100	W/VA20...100

Operating mode LED △: max. connected load for LED lamps typ. 3 ... 400 W, electronic transformers with LV-LED typ. 20 ... 200 W.

Mixed load

ohmic-capacitive 20 ... 420 W

capacitive-inductive not permitted

ohmic-inductive 20 ... 420 VA

ohmic and HV LED typ. 3 ... 100 W

ohmic and compact fl lamp. typ. 3 ... 100 W

i Power specifications including transformer dissipation.

i Operate inductive transformers with at least 85% nominal load in the Universal operating mode.

☐ Ohmic-inductive mixed load: max. 50% proportion of ohmic load. Otherwise, an incorrect measurement is possible.

Operation without neutral conductor: Minimum load 50 W. Does not apply to loads with HV-LED and compact fluorescent lamps.

Power reduction

per 5 °C in excess of 25 °C -10%

when installed in wooden or dry construction walls -15%

when installed in multiple combinations -20%

Power boosters see power booster instructions

Number of extension units

3-wire extension, rotary extension 10

2-wire, push-button unlimited

Total line length

Power cable max. 100 m

Extension max. 100 m

7 Troubleshooting

Connected LED lamps or compact fluorescent lamps switch off in the lowest dimming position or flicker

Cause: The set minimum brightness is too low.

Increase minimum brightness.

Connected lamps do not switch on in the lowest dimming position or only after a delay

Cause: The set minimum brightness is too low.

Increase minimum brightness.

Connected LED lamps or compact fluorescent lamps flicker or buzz, no correct dimming possible, device buzzes

Cause 1: Lamps are not dimmable.

Check manufacturer's instructions.

Exchange lamps for another type.

Cause 2: Operating mode (dimming principle) and lamps do not optimally match.

Check operation in another operating mode, reduce connected load as well if necessary.

Set the operating mode manually.

Exchange lamps for another type.

Cause 3: Dimmer is connected without neutral conductor.

Connect neutral conductor if possible, otherwise exchange lamp for another type.

Connected LED lamps or compact fluorescent lamps in the lowest dimming position are too bright; dimming range is too small

Cause 1: The set minimum brightness is too high.

Reduce minimum brightness.

Cause 2: Operating mode (dimming principle) does not optimally match the connected HV-LED lamps.

Check operation in another operating mode, reduce connected load as well if necessary.

Set the operating mode manually.

Exchange HV-LED lamps for another type.

The dimmer switches the load off briefly and then on again.

Cause: Short-circuit protection has tripped but now there is no longer a fault.

The dimmer has switched off and the load cannot be switched on again

Cause 1: Overheating protection has tripped.

Disconnect dimmer from mains by switching off circuit breaker.

LED trailing edge phase control: Reduce the connected load. Exchange lamps for another type.

LED leading edge phase control: Reduce the connected load. Check operation in the LED trailing edge phase control setting. Exchange lamps for another type.

Let dimmer cool down for at least 15 minutes.

Switch circuit breakers and dimmer on again.

Cause 2: Overvoltage protection has tripped.

LED trailing edge phase control: Check operation in the LED leading edge phase control setting, reduce connected load as well if necessary.

Exchange lamps for another type.

Cause 3: Short-circuit protection has tripped.

Disconnect dimmer from mains by switching off circuit breaker.

Eliminate short-circuit.

Switch circuit breakers and dimmer on again.

i Short-circuit protection is not based on a conventional fuse, no metallic separation of the operational current.

Cause 4: load failure.

Check load, replace lamp. For inductive transformers, check primary fuse.

LED lamp is dimly lit when dimmer is switched off

Cause: LED lamp is not suitable for this dimmer.

Use a compensation module, see accessories.

Use another type of LED lamp or an LED lamp of another manufacturer.

8 Accessories

Compensation module LED Art. no. KMLED230U

9 Warranty

The warranty is provided in accordance with statutory requirements via the specialist trade.

ALBRECHT JUNG GMBH & CO. KG

Volmestraße 1

58579 Schalksmühle

GERMANY

Telefon: [phone]

Telefax: [phone]

[e-mail]

www.jung.de