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Advanced Microprocessor with Graphics Control Setup
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4.8.1 Show 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
4.8.2 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.) 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
4.8.3 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.
!
CAUTION
Do not test a compressor output for more than a few seconds. Compressor
damage could result!