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 TM 9-4120-425-14&P
TRANSFORMER UNIT MAINTENANCE - Continued
0036-00
WARNING
Disconnect air conditioner power supply.
REMOVAL
1.
Remove two screws (1) to remove transformer (2) from junction box chassis (3).
2.
Tag and disconnect transformer leads (1/4 in. quick connects).
3.
Lift transformer (3) out of unit.
TEST
1.
Using a multimeter set on lowest OHMS scale check for continuity across primary terminals "COMN" and
"208 V ac". Continuity should be indicated.
2.
Using a multimeter set on lowest OHMS scale check for continuity across secondary terminals (24 volts).
Continuity should be indicated.
3.
Using a multimeter set on lowest OHMS scale check for continuity between primary (208 V ac) and secondary
(24 V ac) coils. Multimeter should read NO continuity.
4.
If transformer fails steps 1, 2, or 3, transformer is defective. Replace transformer.
0036-00-2
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