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Verify field wiring
is correct. See
NO
CTM motor trouble
shooting
Perform "OPEN
VALVE" test at
EVC.
Does suction
pressure rise?
Ohm coil per FIG1
Is ohm reading
Replace coil
NO
correct?
● Brown (common) to Blue or Yellow should measure 46 ohms
● Red (common) to Orange or White should measure 46 ohms
LOW SUPERHEAT
Superheat below 3F at OD unit
Start Here
Is indoor blower
running?
NO
YES
Replace EVC
NO
Replace EEV.
YES
Check operation
Figure 1
4 - Phase Coil Control
4 - BLUE
5 - BROWN (COMMON)
6 - RED (COMMON)
Is filter, coil,
YES
and blower
wheel clean?
YES
Perform sensor
check
Perform "CLOSE
VALVE" test at
EVC.
Does suction
YES
pressure drop?
3 - ORANGE
2 - YELLOW
1 - WHITE
19
Clean or replace
NO
as needed
Replace EVC
AM7A0C36H31-SF-1A
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