14
Non-cycling Refrigerated Dryer
MODELS D340IN, D40IN, D510IN, D680IN, D850IN, D100IN, D1190IN, D1360IN
http://air.ingersollrand.com
WARNING
An air dryer always operates under pressure. Any
maintenance procedure that involves disassembly of
pipe fittings, valves or any other components requires
the dryer be isolated from the compressed air stream
and fully depressurized.
WARNING
Prior to working on the unit, make sure that all circuit
breakers or disconnected switches are tagged “Out of
Service.”
10.2 PROBLEM / ACTION GUIDE
PROBLEM
SYMPTOM(S)
POSSIBLE CAUSE
CORRECTIVE ACTION
Moisture down stream
Dryer is properly cooling
air stream (Check Chiller.
Temp on controller)
Condensate drain failure
Replace Drain
Excessive flow
Check inlet and outlet pressure and
system design capacity. Correct cause
of excessive flow.
Dryer by-pass valve not
closed
Close by-pass valve
Inlet and outlet
temperatures are the
same.
No power to the dryer
Check power supply and fuses/circuit
breakers
High suction pressure
Check and clean condenser.
Refrigerant leak
Check suction pressure gauge if
reading is 0 psig, turn dryer off and
contact your distributor
Compressor not running and
fan is running
Check and clean condenser.
Check ambient temperature and
reduce below 113°F
Moisture down stream
Inlet and outlet
temperatures are the
same.
Compressor and fan not
running.
Check Exchanger Temperature
Check MAIN CONTROL fuse.
Compressor and fan not
running. Controller indicates
compressor is ON.
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.
10.0 TROUBLESHOOTING
10.1 INTRODUCTION
Ingersoll Rand dryers are designed for reliable, trouble-free operation. In the event of any dryer malfunction, the guide below
has been developed to facilitate problem identification and corrective actions.
