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11.2 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
Service 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 Chiller Temperature
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.
Compressor and fan are
running, exchanger temp
high, pump not running.
Defective Pump
Contact your local distributor for
further assistance.
11.0 TROUBLESHOOTINg
11.1 INTRODUCTION
Ingersoll Rand
Nirvana™ Cycling 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.
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.”
120.26A D4290NCHPW400F Installation Operation and Maintenance Manual
