Advanced Microprocessor with Graphics Control Setup

4.8.1Show Inputs

With the unit on and the fan running, the input state for the following devices may be displayed:

•Air Sail Switch: normally off unless Loss of Air Alarm is active

•Custom Alarm #1: Normally off unless this alarm is active

•Custom Alarm #2: Normally off unless this alarm is active

•Custom Alarm #3: Normally off unless this alarm is active

•Custom Alarm #4: Normally off unless this alarm is active

•Humidifier Problem: Normally on unless this alarm is active

•Filter Clog Switch: Normally off unless Change Filters Alarm is active

•High Head Compressor 2: Normally off unless High Head Pressure Alarm Compressor 2 is active

•Compressor 2 Overload: Normally off unless Compressor 2 Overload Alarm is active

•Shutdown Device: Normally on unless unit is off through the Fire Stat or Remote Shutdown Device

•Low Pressure Switch 2: Normally on if compressor circuit 2 is in operation

•Low Pressure Switch 1: Normally on if compressor circuit 1 is in operation

•Compressor 1 Overload: Normally on unless Compressor 1 Overload Alarm is active

•High Head Compressor 1: Normally off unless High Head Pressure Alarm Compressor 1 is active

4.8.2Test Outputs

When this feature is selected, the unit is effectively turned off. When stepping from one load to the next, the previous load, if on, is turned off automatically. The loads can also be toggled on/off by selecting “ENTER”. Once turned on, the output will remain on for 5 minutes unless toggled off or the test outputs function is exited by selecting “MENU/ESC” (Compressor is limited to 15 seconds on to prevent damage.) DO NOT leave the unit in the test outputs mode any longer than is necessary for troubleshooting. The outputs are as follows:

•Main Fan: Main fan contactor

•Compressor 1: Compressor 1 contactor

•LLSV1: Liquid line solenoid valve 1

•HGBP/CUV1: Hot gas bypass or compressor 1 unloader valve (on certain units)

•Compressor 2: Compressor 2 contactor

•LLSV2: Liquid line solenoid valve 2

•HGBP/CUV2: Hot gas bypass or compressor 2 unloader valve (on certain units)

•CWV/CGV: Chilled water or GLYCOOL valve

•R5 Relay: Relay 5 (heat rejection)

•Reheat 1: Reheat 1 contactor (also energizes fan for safety)

•Reheat 2: Reheat 2 contactor (also energizes fan for safety)

•Reheat 3: Reheat 3 contactor (also energizes fan for safety)

•HWR/Steam: Hot water or steam valve

•Humidifier: Humidifier contactor (also energizes humidifier makeup valve and fan for safety)

•HMV: Humidifier makeup valve

•Common alarm: Common alarm relay

! CAUTION

Do not test a compressor output for more than a few seconds. Compressor damage could result!

4.8.3Test Control Board

By selecting this function, the microcontroller will perform a self test lasting approximately 10 sec- onds. At the end of the test, the ROM checksum, ROM part number and version number will be dis- played.

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Emerson DH, VH, DE, VE manual Show Inputs
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VE, DH, VH, DE specifications

Emerson is a well-known brand in the field of automation solutions, offering a range of products that cater to various industries. Among its diverse portfolio, Emerson’s products like DE (Digital Electronics), VH (Variable Frequency Drives), DH (Distributed Control Systems), and VE (Valve Positioners) stand out for their advanced features, cutting-edge technologies, and unique characteristics.

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In summary, Emerson's DE, VH, DH, and VE offerings embody the latest innovations in automation technology. Their main features, including digital communication, energy efficiency, scalability, and precision control, cater to the diverse demands of modern industries. With these products, Emerson not only enhances operational efficiency but also paves the way for intelligent automation solutions that are crucial for the future of industrial processes.
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