Line Filter (Electromagnetic Compatibility Circuit - Emc) Operations, Checkout And Status / Error Codes - Lennox XC25-024-230-01 Installation And Service Procedure

Line Filter (Electromagnetic Compatibility Circuit - EMC) Operations, Checkout and Status /
Error Codes
OPERATION:
The line filter reduces the unintentional conducted emission from the equipment, to a level sufficient to pass regulatory
limits (such as FCC part 15).
The filter is rated at 208/230 volt, 30 amp maximum, 60 Hertz.
NOTE - The 2- and 3-ton inverters have the EMC built­in. The 4- and 5-ton units have an external device (see illustration
below).
NOTE - A line filter is an electronic filter which is placed between electronic equipment and an external power source in order
to attenuate conducted radio frequency interference (RFI). RFI is also known as electromagnetic interference (EMI).
CHECKOUT:
Voltage IN should read the same value as the Voltage OUT. With filter isolated from system, resistance between L1 and L2
should be the same as resistance between N1 and N2.
STATUS CODES:
None
ERROR CODES:
None
L2
L1
208/240
Voltage OUT
208/240
Voltage IN
N1
N2
Figure 45. XC25 4- and 5-ton filter board (EMC)
XC25
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