Trane IntelliPak CGAF Series - Failure Modes and Types

46
System Testing & Troubleshooting
Used on Units:
All Units
The word MORE will only appear if more than one failure has
occured.
If additional active diagnostics are present, pressing the NEXT key will display them.
Possible Values:
CGM ICS Temperature Sensor Fail Sat Liquid Temp Sensor Fail Ckt 1
CGM Module Data Storage Error Sat Liquid Temp Sensor Fail Ckt 2
EST/LST Low Temperature Indication Suction Pressure Sensor Fail Ckt 1
Hot Start Load Limit (Info) Suction Pressure Sensor Fail Ckt 2
Liquid Pressure Sensor Fail Ckt 1 Suction Temp Sensor Fail Ckt 1
Liquid Pressure Sensor Fail Ckt 2 Suction Temp Sensor Fail Ckt 2
Pumpdown Terminated By Time Ckt 1 Superheat/Subcool Module Fail
Pumpdown Terminated By Time Ckt 2
After viewing all active diagnostics, pressing the NEXT key will display the following screen
Used on Units:
All Units
Possible Values:
Log Number 1-20, Viewed or
Not Viewed, Active or History, Manual, Auto,
or Info., Any diagnostic listed under the previous
Pressing the NEXT key will display each successive log entry. screens associated with the type of diagnostic.
1. Pressing the "CANCEL" key to clear the diagnostics log will
display the following screen.
Used on Units:
All Units
Possible Values:
+ (Plus) and - (Minus)
1. Press the + (Plus) or - (Minus) keys to enter the password
2. Press the ENTER key to confirm this choice. When the
correct password is entered, the following screen will be
displayed.
Used on Units:
All Units
Possible Values:
Manual, Auto, or Info
If the "DIAGNOSTIC LOG" is empty when the "CANCEL" key is
pressed, the following screen will be displayed.
Used on Units:
All Units
Possible Values:
Manual, Auto, or Info
Press the AUTO or STOP key to return to the top level status screen.
Active Diagnostic ---- Info
More
Log 1 __________
Diagnostic Log Is Password Protected
Please Enter Password:
Active Diagnostics ____________________
"Please Wait . . . Updating Diagnostic Log"
Active Diagnostics ---- Info
"Diagnostic Buffer Is Already Empty !"
Failure Modes
When any condition results in the unit's unability to perform
a normal function, it is said to have entered a failure mode.
There are two types of failure modes.
1. An "Analog input out of range" failure mode.
This failure mode occurs when a sensing device such as a
temperature sensor begins to transmit information that is
outside its allowable range.
2. A "Fault recognition by input logic" failure mode.
This failure mode occurs when the UCM receives informa-
tion that does not "make sense" or does not conform to its
predefined logic.