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Y
Start
Is
Contactor
pulled in?
Freeze Stat
opened?
24v
across
X1 & X2
at the
Fan Coil?
Y
230v
into
Contactor?
Supply
230v Power
to Condensor
N
Y
230v
out of
Contactor?
Check
Compressor
Y
N
Replace
Contactor
N
Check for
24v
across
Contactor Coil
24v
across
X1 & C
at the
Fan Coil?
Y
N
Allow
System
to settle and
Freeze Stat
to open
Y
N
Check for open
Safety Controls
on
Outdoor Unit
Ensure System is
properly
Charged
and A
irflow
is correct
Refer to
Troubleshooting - 24v
N
Y
Ensure System is
Properly
Charged
and
Airflow
is correct
N
Y
N
Check for
improper Wiring
or
Damage
between Indoor and
Outdoor Units
Replace
Wiring
Y
Replace
Freeze Stat
Y
-48-
Module HE-Z DIA Diagnostics &
Trouble Shooting (7/8)
Module DIA Diagnostics & Trouble Shooting (7/8)
Troubleshooting - Outdoor Unit - Electrical