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SYMPTOMS PROBABLE CAUSE REMEDY
g. Defective refrigerant g. Repair or replace
compressor valves. compressor.
h. Suction pressure too high. h. Adjust hot gas bypass
valve.
Dryer running.
a. Leaky refrigerant circuitry. a. Locate and repair.
High temperature light on,
analyzer gauge pressure low. b. Suction pressure too low b. Adjust hot gas
Check refrigerant charge. bypass valve.
Dryer running.
a. Defective hot gas bypass a. Replace.
High temperature light off, valve.
analyzer gauge pressure low.
b. Defective fan control b. Replace.
(low ambient control).
c. Low ambient temperature. c. Heat ambient or relocate
dryer.
d. Low refrigerant charge. d. Repair leak and add
refrigerant.
Dryer not running.
a. Low pressure switch open. a. Check for leak and repair.
High temperature light on,
analyzer gauge pressure low. b. Service valves closed. b. Open valves.
c. High suction gas c. Check for leak.
temperature.
Water downstream of
a. Trap not functioning. a. Clean or repair trap.
the dryer.
b. High inlet temperature. b. Check aftercooler.
c. Excess flow. c. Dryer undersized.
Replace with larger dryer.
d. Low air pressure. d. Dryer undersized.
Replace with larger dryer.
e. Bypass valve open. e. Close valve.
TROUBLESHOOTING GUIDE continued
SYMPTOMS PROBABLE CAUSE REMEDY