System Operation Monitor (LSOM)
The system operation monitor (A132) detects the most common fault conditions in the air conditioning system. When an abnormal condition is detected, the module com- municates the specific condition through its ALERT and TRIP lights. The module is capable of detecting both me- chanical and electrical system problems. See figure 9 for the system operation monitor.
System Operation Monitor (A132)
POWER LED |
| |
DATA OUTPUT | DATA OUTPUT | |
| ||
Y | CONNECTOR | |
C | .25" SPADE | |
CONNECTOR (5) | ||
| ||
R |
| |
ALERT LED |
| |
TRIP LED |
|
Figure 9
IMPORTANT
This monitor does not provide safety protection. The monitor is a monitoring device only and cannot con- trol or shut down other devices.
LSOM LED Functions
Power LED (green) −− Voltage within the range of 19−28VAC is present at the system monitor power connec- tion.
Alert LED (yellow) −− Communicates an abnormal system condition through a unique flash code. The alert LED flashes a number of times consecutively; then pauses; then repeats the process. This consecutive flashing corre- sponds with a particular abnormal condition.
Trip LED (red) −− Indicates a demand signal from the ther- mostat; but detects no current to the compressor.
Flash code number −− Corresponds to a number of LED flashes, followed by a pause, and then repeated.
Trip & Alert LEDs flashing simultaneously −− Indicates that the control circuit voltage is too low for operation.
Reset ALERT flash code by removing 24VAC power from monitor. Last ALERT flash code will display for 1 minute af- ter monitor is powered on.
LSOM codes are given in table 5.
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