Lennox MS8 SERIES

Page 78
MS8C / MS8H (208-230V)
Resistances between the blue wire
terminal and all other wire terminals
should be within +
5 of each other.
Replace
Outdoor
control
Replace electronic
expansion valve
Is fault
corrected?
Is fault
corrected?
Check for refrigerant
leak, correct leak and
correct charge
Is wired
correctly?
Is the electronic
expansion valve terminal
FA connected correctly.
N
N
Y
N
Y
Y
End
N
N
OUTDOOR UNIT OVERLOAD AND DISCHARGE LINE SENSOR MALFUNCTION
APPLICABLE UNIT SIZE(S): All
APPLICABLE ERROR CODE(S): E4, H4
FIGURE 87