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 communicates the specific condition through its ALERT and TRIP lights. The module is capable of detecting both mechanical and electrical system problems. See figure 15 for the system operation monitor.
System Operation Monitor (A132)
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 corresponds with a particular abnormal condition.
Trip LED (red) −− Indicates a demand signal from the thermostat; 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
POWER LED |
DATA OUTPUT |
Y |
C |
ALERT LED |
TRIP LED |
DATA OUTPUT |
CONNECTOR |
.25" SPADE |
CONNECTOR |
the control circuit voltage is too low for operation.
The monitor has an automatic reset function which is based on the number of normal run cycles. See table 9.
LSOM codes are given in table 10.
Table 9
Comfort Alert Code Auto−Reset Function
Figure 15
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 connection.
Code Number | Normal Run Cycles Required | |
for Automatic Reset | ||
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|
| |
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| |
1 | 30 | |
|
| |
2, 3, 4 | 4 | |
|
| |
5, 6, 7, 9 | 1 |
Condenser Fan Clearances
The top of the condenser fan should be 1−1/2 inches from the bottom of the top grille. This dimension should be checked and the fan should be adjusted accordingly any time servicing of the outdoor fan system is required.
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