Emerson VE, VH, DE Main Menu AM-Date and Time, Test Outputs, Test Control Board, Change Passwords

Advanced Microprocessor Controls Setup

Test 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.) The outputs are as follows:

• Main fan: main fan contactor

• Comp 1: compressor 1 contactor

• LLSV1: liquid line solenoid valve 1

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

• Comp 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)

• RH 3/ Dehum Damper: Reheat 3/ dehum damper 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

• Comm alarm: common alarm relay

! CAUTION

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

Test 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.

3.4.4Change Passwords

This function prompts you to enter a three-digit password when making changes. The system includes two (2) passwords, one for setpoints and one for setup. The system allows the passwords to be changed by first entering the present password, factory set as “123” for setpoints and “321” for setup. The password function provides system security, so only personnel authorized to make changes should know the passwords. If unauthorized changes are being made, the passwords may be compro- mised and new ones should be selected. The password function can be disabled by setting DIP switch 8 to OFF.

3.5Main Menu (AM)—Date and Time

The current date and time is available through the display. This feature allows the date and time to be read or changed and is accessed by selecting Date and Time from the Main Menu.

The Date and Time is used by the control only for recording the Alarm History.

NOTE

The clock uses the 24 hour system. For example, 17:00 is 5:00 PM. The date and time are protected by a battery backup.

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