Run Diagnostics (Available On Rev 1.001.0 And Higher) - Liebert Mini-Mate2 MMD24E User Manual

6.17

Run Diagnostics (Available On Rev 1.001.0 and Higher)

By selecting Run Diagnostics, maintenance personnel can check system inputs, outputs and conduct a
test of the microcontroller circuit board from the wall box control. A review of the system inputs and
the microcontroller test can be done without interrupting normal operation.
Show Inputs
With the unit on and the fan running, the input states may be displayed for the following devices:
High Water Alarm: Normally off unless High Water Alarm is active.
• High Head Pressure Alarm: Normally Off unless High head Pressure alarm is active.
• Custom alarm #1: Normally Off unless this special customer selectable alarm is active.
• Custom alarm #2: Normally Off unless this special customer selectable alarm is active.
• Power: Normally On unless unit is turned off through the wall box, or any of these optional
devices: high temperature sensor, smoke detector, high water alarm or remote shutdown
Test Outputs
When this feature is selected, the unit is effectively turned Off. When stepping from one load to the
next, the previous load is automatically turned Off. The loads can also be toggled on/ off by selecting
"ENTER". Once turned on, the output will remain on for five 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.)
NOTICE
Risk of overheating the compressor during the Test Outputs mode. Can cause compressor
damage.
Testing the compressor output for more than a few seconds can damage the compressor. Do
not operate the unit in the Test Outputs mode any longer than is necessary for
troubleshooting.
NOTICE
Risk of extended unit operation in the Test Outputs mode for troubleshooting. Can cause
damage to unit.
DO NOT operate unit in the Test Outputs mode any longer than is necessary for
troubleshooting
The outputs are:
• Normal Fan: Normal speed fan contactor
• Low Speed Fan: Low speed fan contactor
• Humidifier: Humidifier contactor
• Cool: Compressor contactor
• HGBP: Hot gas bypass valve
• Reheat: Reheat contactor
• Common Alarm: Common alarm relay
NOTE
Fan turned on with all loads.
Test Control Board
By selecting this function, the microcontroller will perform a self test lasting approximately 10
seconds. When the test is complete, the display will show the ROM checksum, ROM part number and
firmware vision number.
® ™
Liebert Mini-Mate2 50
Microprocessor Control