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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.
3.4.4
Change 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.
3.5
Main 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.
Advanced Microprocessor Controls Setup
14
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Table of Contents
Troubleshooting
