Lennox MS8 SERIES

Page 80
MS8C / MS8H (208-230V)
Y
N
Y
N
N
Y
N
N
Y
N
Y
N
Y
Y
Start
Did the system
operate normally
before the failure
occurred?
Check inter-unit
wiring
Is cable
(wires)
damaged?
The control
voltage
detection circuit
is at fault.
Check communication circuit
of outdoor unit
Is fault corrected?
Is connection
correct?
Is there a
communication
circuit error?
Replace outdoor
control
Replace indoor or
outdoor control
End
Correct inter-unit
using unit wiring
diagram.
Verify inter-unit wiring using
the unit wiring diagram
Is fault corrected?
Is fault corrected?
See page 87 for procedure for testing
communication line.
INTER-UNIT COMMUNICATION ERROR
APPLICABLE UNIT SIZE(S): All
APPLICABLE ERROR CODE(S): E6
FIGURE 89