Emerson DE Refrigerator User Manual


 
Advanced Microprocessor with Graphics Control Setup
27
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!