20
PROBLEM
Moisture down
stream
High pressure
drop across dryer
SYMPTOM(S)
Inlet and outlet
temperatures are the
same.
Outlet pressure
substantially lower
than inlet pressure
POSSIBLE CAUSE
Compressor not running
and fan is running
Compressor and fan not
running (Refrig ON light
is off)
Compressor and fan not
running (Refrig ON light
is on)
Inlet and outlet valves
not completely open
Inlet and outlet filters
blocked up
Heat exchanger has
become clogged
System operating
temperature is below
32°F
CORRECTIVE ACTION
Check and clean ambient air filter.
Check ambient temperature and
reduce below 120°F
Controller adjustment required.
Disconnect power source and reinitiate
start up procedures
Compressor relay may be bad, replace
relay
Check for loose wire connections at
contactor or loss of power at control
board
Defective control board - replace as
necessary
Contact your local distributor for further
assistance.
Open valves
Change filter elements
Flush air system as required, check
with your local distributor
Turn dryer off and consult your local
distributor for further assistance