Macurco DVP-120 No Power, LCD Display unreadable, Keypad does not respond LCD shows Keys Locked

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4.3No Power

WARNING

120/240 VAC terminals are located within the DVP-120, presenting a hazard to service technicians. Only qualified technicians should open the DVP-120 case and service the internal circuits. Ensure power is removed from the DVP-120 prior to servicing the unit.

The DVP-120 starts up as soon as power is applied to the microcontroller, and the DVP-120 is designed to have power continuously applied to the unit. An external indication of successful power application to the unit is the immediate operation of the Status Lamps grouped around the LCD. If the operator does not see immediate response from the status lamps, power should be checked at J4 (refer to Figure 1-2 for connector locations).

If the correct voltage is noted at J4, then the internal fuse of the DVP-120 should be investigated. The DVP-120 is protected from over-current and transient situations by the fuse at F3. AFTER removing power from the DVP-120, F3 can be checked by removing the safety cover. If necessary, replace F3 with a 5x20 mm SLO-BLO fuse with a rating of 1 Amp 250V, e.g. Littlefuse P/N 218001. Be sure to REPLACE THE SAFETY COVER on F3 before re-applying power to the DVP-120.

4.4LCD Display unreadable

It is possible that the LCD is unreadable due to temperature or aging of the control panel. If this is the case the following steps should rectify the problem:

4.4.1 Hold the MENU key for three (3) seconds.

After three seconds, the power led will turn red. After a further two seconds, the LCD backlight will also be turned off.

4.4.2 Press the UP and DOWN cursor keys to change the LCD contrast.

Each press of the UP or DOWN cursor key will change the contrast by a step in that direction. Adjust the contrast for best viewing.

4.4.3Press any other key to exit the contrast-setting mode.

4.5The Keypad does not respond (LCD shows KEYS LOCKED)

The keypad can be unlocked by holding the zero (0) key for three seconds. At which time the backlight will turn on and the display will return to normal mode..

The keypad can again be locked by holding the zero key for three seconds, until the display shows KEYS LOCKED.

4.6After a power failure

After any power failure, the user should check the system clock. While system parameters are maintained in non-volatile memory, the system clock is backed-up by a limited-capacity button cell battery. Even though the button cell can run the clock for several years, it will eventually wear out.

Revision 0.07

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Contents DVP-120 Installation & Operating Instructions List of Figures Normal System Display List of Tables General Information FeaturesCompatible Macurco Transducers System Wiring Diagram DVP-120 Internal View Warranty Specifications1Return Instructions Mounting the DVP-120 General Wiring InformationRemote Sensor Connection Main power ConnectionSensor Connectors Channel and Pin Assignments Relay Connection Relay ConnectorHorn & Strobe Connection Horn & Strobe signals and Connector AssignmentsInterfacing Macurco Sensors DVP 1 2 0 V e r 1 Initial Operating ModeP 1 2 R m u p Status Light DisplayKeypad layout User InterfaceMO N 1 0 2 3 R 1 C O Alarm Status DisplayO w S e n s o r S E N S O R 0WA R N I N G F O R 1 R 5 M I N U T E STrouble Status Display R 8 H O U R S Zone Signal DisplayR 1 5 M I N U T E S Ventilation controlV e C o n f i g . ? 0 = N O , 1 = Y E S Setting the System ConfigurationM e 2 2 5 Y T u e s d a y Configure System SubmenuM e 0 1 5 Y T u e s d a y M e 1 6 5 Y T u e s d a yM e 2 2 5 Y 2 T u e s d a y O a d D e Fault C o n f i g u r a t i o nO n g P a s s w o r d S s w o r dConfigure Sensors Submenu N s o r Alarm 0 p p mN s o N s P eN s o r N g e 0 p p m N s o r 0 R n i n g 5 0 p p mL a y O r m . O f f M i n . O n Configure Relays, Horn & Strobe SubmenuL a y 1 N o r m . O f f D e L a y 1 D e l a y S s 0 1 0R n R m . O f f L a Configure Horn SubmenuR n R m . O f f D e R n L a y S sR o b e 5 N o r m . O f f L a y O n Configure Strobe SubmenuR o b e R m . O f f D e R o b e S sN e 1 C o n t r o l s R 2 R 3 H 4 S Configure Zones SubmenuO u p N s o r T y p e R o u p M e d A r t T i m e R o u p D a y s I m e d W e e k d a y sR o u p 1 T i m e d O p T i m e 1 8 0 R o u p 1 N O N s o r s 0 2 , 0 4 , 1R o u p L l i n g P m R o u p S i n g P mO u p D e 2 V o t i n g O u p U mAlarm S i g n a l s Z z 2 I n t e r m i t Alarm S i g n a l s Z z , H o r n , S t r o b eAlarm S i g n a l s R n 2 I n t e r m i t Configure Signals SubmenuB e 1 C o n t i n M S i g n a l sR n G S i g n a l s Z z R n S i g n a l s Z zO u b l e S i g n a l s Z z R o b eO u b l e B u z z G n a l s T r i p l e O u b l e S i g n a l s R nO u b S i g n a l s R o b e 63 Strobe Trouble SignalSystem Status Light Flashing Timed ventilation problemInput Channel Trouble Internal Controller Board TroubleAfter a power failure No PowerLCD Display unreadable Keypad does not respond LCD shows Keys Locked

DVP-120 specifications

The Macurco DVP-120 is an advanced gas detection sensor that is designed for various commercial and industrial applications. It provides real-time monitoring of hazardous gases, ensuring safety in environments where gas leaks can pose significant risks. The device is built with high-precision technology, allowing for accurate detection of gases such as carbon monoxide, methane, propane, and others.

One of the standout features of the DVP-120 is its dual-channel sensing capabilities. This allows the unit to simultaneously monitor two different gas types, which significantly enhances its versatility in diverse settings. Users can customize the device to target specific gases relevant to their operations, making it a highly adaptable tool for a variety of workplaces.

The DVP-120 utilizes state-of-the-art electrochemical sensors that deliver reliable and fast response times, allowing businesses to act quickly in the event of a gas leak. These sensors are known for their long lifespan and low maintenance requirements, thus reducing the total cost of ownership over time. Additionally, the sensor head is designed for easy replacement, further simplifying maintenance for users.

Another notable characteristic of the DVP-120 is its user-friendly interface. The device features an intuitive LCD display that provides clear readings, making it easy for operators to monitor gas levels at a glance. The display also includes alarm indicators, ensuring that users are alerted promptly in an emergency situation. The alarms can be configured with different sound levels and visual alerts to suit the needs of the environment.

Moreover, the Macurco DVP-120 is equipped with advanced connectivity options, including wired and wireless communication capabilities. This allows the device to be integrated into existing monitoring systems or networks, ensuring seamless operation alongside other safety equipment.

In terms of durability, the DVP-120 is built to withstand harsh environmental conditions. Its rugged housing is resistant to dust and moisture, making it suitable for use in industrial settings where exposure to various elements is a concern.

Overall, the Macurco DVP-120 is a comprehensive solution for gas detection and monitoring. With its combination of advanced sensing technology, user-friendly design, and robust construction, it stands out as an essential tool for ensuring the safety and efficiency of operations across various industries.
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